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Weex开发之地图篇的具体使用

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在移动应用开发中，地图是一个很重要的工具，基于地图的定位、导航等特点衍生出了很多著名的移动应用。在Weex开发中，如果要使用定位、导航和坐标计算等常见的地图功能，可以使用weex-amap插件。

weex-amap是高德针对Weex开发的一款地图插件，在Eros开发中，Eros对weex-amap进行二次封装，以便让开发者更集成地图功能。和其他的插件一样，集成此插件需要在原生平台中进行集成。

本文介绍的是如何在iOS中集成weex-amap，以及它的一些核心功能。本文将要介绍的内容如下：

1.高德地图开发准备工作

2. weex-iOS地图组件扩展方式介绍

3.weex-android地图组件扩展方式介绍

4.weex-html5地图组件扩展方式介绍

5.获取地图数据（例如骑行路径规划）

在这里插入图片描述

准备工作

1.1 开发流程简绍

1.使用 CocoaPods 安装AMapSearch,AMap3DMap SDK
2.前往高德开放平台控制台申请 iOS Key
3.配置高德Key至AppDelegate.m文件

1.2 android高德地图开发流程简绍

1.使用 CocoaPods 安装AMapSearch,AMap3DMap SDK
2.前往高德开放平台控制台申请 android Key
3.AndroidManifest.xml的application标签中配置Key
4.AndroidManifest.xml中配置权限

1.3 HTML5高德地图开发流程简绍

1.前往高德开放平台控制台申请 jsAPI Key
2.可通过CDN同步加载方式或使用require异步方式来加载key

参考：高德地图开发文档，vue-amap开发文档

weex-iOS地图组件扩展

2.1 weex-amap

地图展示是地图最基本的功能，其常见的效果如下：

在这里插入图片描述

如有要在iOS中自定义weex-amap可以从以下几个步骤完成：

1.新建DMapViewComponent类继承WXComponent；
2.在DMapViewComponent实现文件中实现MAMapViewDelegate代理；
3. 重写DMapViewComponent的loadView方法加载地图视图并设置自身为代理对象；
4.在DMapViewComponent的初始化函数viewDidLoad中做一些准备工作；
5.在DMapViewComponent的initWithRef方法中实现属性绑定；
6.通过fireEvent添加适当时机可以触发的事件；
7.重写insertSubview方法来添加子组建包括覆盖物，线，圆等等。

下面是部分的业务实现代码：

@implementation DMapViewComponent
...
// 属性绑定
- (instancetype)initWithRef:(NSString *)ref
            type:(NSString*)type
           styles:(nullable NSDictionary *)styles
         attributes:(nullable NSDictionary *)attributes
           events:(nullable NSArray *)events
        weexInstance:(WXSDKInstance *)weexInstance
{
  self = [super initWithRef:ref type:type styles:styles attributes:attributes events:events weexInstance:weexInstance];
  if (self) {
    // 中心点
    NSArray *center = [attributes map_safeObjectForKey:@"center"];
    _zoomLevel = [[attributes map_safeObjectForKey:@"zoom"] floatValue];
    // 是否允许显示指南针
    _compass = [[attributes map_safeObjectForKey:@"compass"] boolValue];
    // sdkKey
    if ([attributes map_safeObjectForKey:@"sdkKey"]) {
      [self setAPIKey:[attributes[@"sdkKey"] objectForKey:@"ios"] ? : @""];
    }
...
  }
  return self;
}
// 重写DMapViewComponent的loadView方法加载地图视图并设置自身为代理对象  
- (UIView *) loadView
{
  UIWindow *window = [UIApplication sharedApplication].keyWindow;
  CGSize windowSize = window.rootViewController.view.frame.size;
  self.mapView = [[MAMapView alloc] initWithFrame:CGRectMake(0, 0, windowSize.width, windowSize.height)];
  self.mapView.showsUserLocation = _showGeolocation;
  self.mapView.delegate = self;
  self.mapView.customMapStyleEnabled = YES;
  [self.mapView setCustomMapStyleWithWebData:[self getMapData]];

  return self.mapView;
}
// 设置地图样式
- (NSData *)getMapData
{
  NSString *path = [NSString stringWithFormat:@"%@/gaodeMapStyle.data", [NSBundle mainBundle].bundlePath];
  NSData *data = [NSData dataWithContentsOfFile:path];
  return data;
}

- (void)viewDidLoad
{
  [super viewDidLoad];
  self.mapView.showsScale = _showScale;
  self.mapView.showsCompass = _compass;
  [self.mapView setCenterCoordinate:_centerCoordinate];
  [self.mapView setZoomLevel:_zoomLevel];
}

// 添加覆盖物
- (void)insertSubview:(WXComponent *)subcomponent atIndex:(NSInteger)index
{
  if ([subcomponent isKindOfClass:[DMapRenderer class]]) {
    DMapRenderer *overlayRenderer = (DMapRenderer *)subcomponent;
    [self addOverlay:overlayRenderer];
  }else if ([subcomponent isKindOfClass:[DMapViewMarkerComponent class]]) {
    [self addMarker:(DMapViewMarkerComponent *)subcomponent];
  }
}
// 更新属性
- (void)updateAttributes:(NSDictionary *)attributes
{
...
  if (attributes[@"zoom"]) {
    [self setZoomLevel:[attributes[@"zoom"] floatValue]];
  }
 ...
}
#pragma mark - component interface
- (void)setAPIKey:(NSString *)appKey
{
  [AMapServices sharedServices].apiKey = appKey;
}
- (void)setZoomLevel:(CGFloat)zoom
{
  [self.mapView setZoomLevel:zoom animated:YES];
}
#pragma mark - publish method
- (NSDictionary *)getUserLocation
{
  if(self.mapView.userLocation.updating && self.mapView.userLocation.location) {
    NSArray *coordinate = @[[NSNumber numberWithDouble:self.mapView.userLocation.location.coordinate.longitude],[NSNumber numberWithDouble:self.mapView.userLocation.location.coordinate.latitude]];
    NSDictionary *userDic = @{@"result":@"success",@"data":@{@"position":coordinate,@"title":@""}};
    return userDic;
  }
  return @{@"resuldt":@"false",@"data":@""};
}

#pragma mark - mapview delegate
/*!
 @brief 根据anntation生成对应的View
 */
- (MAAnnotationView*)mapView:(MAMapView *)mapView viewForAnnotation:(id <MAAnnotation>)annotation
{
  if ([annotation isKindOfClass:[MAPointAnnotation class]])
  {
    MAPointAnnotation *pointAnnotation = (MAPointAnnotation *)annotation;
    if ([pointAnnotation.component isKindOfClass:[WXMapInfoWindowComponent class]]) {
      return [self _generateCustomInfoWindow:mapView viewForAnnotation:pointAnnotation];

    }else {
      return [self _generateAnnotationView:mapView viewForAnnotation:pointAnnotation];
    }
  }

  return nil;
}

/**
 * @brief 当选中一个annotation views时，调用此接口
 * @param mapView 地图View
 * @param view 选中的annotation views
 */
- (void)mapView:(MAMapView *)mapView didSelectAnnotationView:(MAAnnotationView *)view
{
  MAPointAnnotation *annotation = view.annotation;
  for (WXComponent *component in self.subcomponents) {
    if ([component isKindOfClass:[WXMapViewMarkerComponent class]] &&
      [component.ref isEqualToString:annotation.component.ref]) {
      WXMapViewMarkerComponent *marker = (WXMapViewMarkerComponent *)component;
      if (marker.clickEvent) {
        [marker fireEvent:marker.clickEvent params:[NSDictionary dictionary]];
      }
    }
  }
}

/**
 * @brief 当取消选中一个annotation views时，调用此接口
 * @param mapView 地图View
 * @param view 取消选中的annotation views
 */
- (void)mapView:(MAMapView *)mapView didDeselectAnnotationView:(MAAnnotationView *)view
{

}

/**
 * @brief 地图移动结束后调用此接口
 * @param mapView    地图view
 * @param wasUserAction 标识是否是用户动作
 */
- (void)mapView:(MAMapView *)mapView mapDidMoveByUser:(BOOL)wasUserAction
{
  if (_isDragend) {
    [self fireEvent:@"dragend" params:[NSDictionary dictionary]];
  }
}

/**设置地图缩放级别 */
- (void)setMapViewRegion:(NSMutableArray *)poiArray animated:(BOOL)animated {
  NSMutableArray *arrays = [NSMutableArray array];
  for (MAPointAnnotation *anot in self.mapView.annotations) {
    CLLocationCoordinate2D coordinate = anot.coordinate;
    NSDictionary *poidic = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:coordinate.latitude * 1000000], @"lat",
                [NSNumber numberWithInt:coordinate.longitude * 1000000], @"lng", nil];
    [arrays addObject:poidic];
  }

  MACoordinateRegion region = [self getCoordinateMapSpan:arrays];
  [self.mapView setRegion:region animated:animated];
}

/**配置地图region */
- (MACoordinateRegion)getCoordinateMapSpan:(NSMutableArray *)knightArray {
  MACoordinateRegion region;
  MACoordinateSpan span;

  CLLocationDegrees maxLat = -90;
  CLLocationDegrees maxLon = -180;
  CLLocationDegrees minLat = 90;
  CLLocationDegrees minLon = 180;

  if (knightArray && knightArray.count > 1) {
    for (int i = 0; i < knightArray.count; i++) {
      NSDictionary *knightDictionary = [knightArray objectAtIndex:i];
      float lat = [[knightDictionary objectForKey:@"lat"] floatValue] / 1000000;
      float lng = [[knightDictionary objectForKey:@"lng"] floatValue] / 1000000;

      if(lat > maxLat)
        maxLat = lat;
      if(lat < minLat)
        minLat = lat;
      if(lng > maxLon)
        maxLon = lng;
      if(lng < minLon)
        minLon = lng;
    }

    span.latitudeDelta = (maxLat - minLat) * 2 + 0.005;
    span.longitudeDelta = (maxLon - minLon) * 2 + 0.005;
    region.center.latitude = (maxLat + minLat) / 2;
    region.center.longitude = (maxLon + minLon) / 2;
    region.span = span;
  } else {
    NSDictionary *knightDictionary = [knightArray objectAtIndex:0];
    span.latitudeDelta = 0.01;
    span.longitudeDelta = 0.01;
    float lat = [[knightDictionary objectForKey:@"lat"] floatValue] / 1000000;
    float lng = [[knightDictionary objectForKey:@"lng"] floatValue] / 1000000;
    if (lat !=0 && lng != 0) {
      region.center.longitude = lng;
      region.center.latitude = lat;
    } else {
      region.center = [[ShopLocateManager shared] getLocationCoordinate];
    }
    region.span = span;
  }

  return region;
}
...
@end

2.2 weex-amap-marker

marker主要用于实现锚点，其效果如下：

在这里插入图片描述

要在Weex中自定义锚点，需要遵循以下几步：

部分实现代码如下：

- (instancetype)initWithRef:(NSString *)ref
            type:(NSString*)type
           styles:(nullable NSDictionary *)styles
         attributes:(nullable NSDictionary *)attributes
           events:(nullable NSArray *)events
        weexInstance:(WXSDKInstance *)weexInstance
{
  self = [super initWithRef:ref type:type styles:styles attributes:attributes events:events weexInstance:weexInstance];
  if (self) {
    if ([events containsObject:@"click"]) {
      _clickEvent = @"click";
    }
    NSArray *offset = attributes[@"offset"];
    if ([WXConvert isValidatedArray:offset]) {
      _offset = CGPointMake([WXConvert CGFloat:offset[0]],
                 [WXConvert CGFloat:offset[1]]);//[WXConvert sizeToWXPixelType:attributes[@"offset"] withInstance:self.weexInstance];
    }
    if (styles[@"zIndex"]) {
      _zIndex = [styles[@"zIndex"] integerValue];
    }
    _hideCallout = [[attributes map_safeObjectForKey:@"hideCallout"] boolValue];
    NSArray *position = [attributes map_safeObjectForKey:@"position"];
    if ([WXConvert isValidatedArray:position]) {
      _location = [attributes map_safeObjectForKey:@"position"];
    }
    _title = [attributes map_safeObjectForKey:@"title"];
    _icon = [attributes map_safeObjectForKey:@"icon"];
  }
  return self;
}

- (void)updateAttributes:(NSDictionary *)attributes
{
  DMapViewComponent *mapComponent = (DMapViewComponent *)self.supercomponent;
  if (attributes[@"title"]) {
    _title = attributes[@"title"];
    [mapComponent updateTitleMarker:self];
  }

  if ([attributes map_safeObjectForKey:@"icon"]) {
    _icon = attributes[@"icon"];
    [mapComponent updateIconMarker:self];
  }

  NSArray *position = [attributes map_safeObjectForKey:@"position"];
  if ([WXConvert isValidatedArray:position]) {
    _location = position;
    [mapComponent updateLocationMarker:self];
  }
}

weex-amap-info-window

weex-amap-info-window组件主要用于显示地图信息，如地图的图片模式，其效果如下：

在这里插入图片描述

要自定义窗体组件，需要用到以下几个步骤：

部分实现代码如下：

- (instancetype)initWithRef:(NSString *)ref
            type:(NSString*)type
           styles:(nullable NSDictionary *)styles
         attributes:(nullable NSDictionary *)attributes
           events:(nullable NSArray *)events
        weexInstance:(WXSDKInstance *)weexInstance
{
  self = [super initWithRef:ref type:type styles:styles attributes:attributes events:events weexInstance:weexInstance];
  if (self) {
    if (attributes[@"open"]) {
      _isOpen = [attributes[@"open"] boolValue];
    }

  }
  return self;
}

- (UIView *) loadView
{
  return [[DMapInfoWindow alloc] initWithAnnotation:_annotation reuseIdentifier:_identifier];
}

- (void)insertSubview:(WXComponent *)subcomponent atIndex:(NSInteger)index{}
- (void)updateAttributes:(NSDictionary *)attributes
{
  [super updateAttributes:attributes];
  if (attributes[@"open"])
  {
    _isOpen = [attributes[@"open"] boolValue];
    if (_isOpen) {
      [self _addSubView];
    }else {
      [self _removeViewFromSuperView];
    }
  }
}

#pragma mark - private method
 1. (void)_addSubView
{
  [self _removeViewFromSuperView];
  [(DMapViewComponent *)self.supercomponent addMarker:self];
}

 2. (void)_removeViewFromSuperView
{
  [(DMapViewComponent *)self.supercomponent removeMarker:self];
}

2.4 weex-amap-circle

weex-amap-circle组件主要用于实现画圈功能，如地图范围，其效果如下图所示：

在这里插入图片描述

下面是部分实现逻辑：

- (instancetype)initWithRef:(NSString *)ref
            type:(NSString*)type
           styles:(nullable NSDictionary *)styles
         attributes:(nullable NSDictionary *)attributes
           events:(nullable NSArray *)events
        weexInstance:(WXSDKInstance *)weexInstance
{
  self = [super initWithRef:ref type:type styles:styles attributes:attributes events:events weexInstance:weexInstance];
  if (self) {
    NSArray *centerArray = [attributes map_safeObjectForKey:@"center"];
    if ([WXConvert isValidatedArray:centerArray]) {
      _center = centerArray;
    }
    _radius = [[attributes map_safeObjectForKey:@"radius"] doubleValue];
  }
  return self;
}

- (void)updateAttributes:(NSDictionary *)attributes
{
  NSArray *centerArray = [attributes map_safeObjectForKey:@"center"];
  DMapViewComponent *parentComponent = (DMapViewComponent *)self.supercomponent;
  if ([WXConvert isValidatedArray:centerArray]) {
    _center = centerArray;
    [parentComponent removeOverlay:self];
    [parentComponent addOverlay:self];
  }else if ([[attributes map_safeObjectForKey:@"radius"] doubleValue] >= 0) {
    _radius = [[attributes map_safeObjectForKey:@"radius"] doubleValue];
    [parentComponent removeOverlay:self];
    [parentComponent addOverlay:self];
  }else {
    [super updateAttributes:attributes];
  }
}

2.5 weex-amap-polygon

weex-amap-polygon主要用于绘制多边形，其效果如下图：

在这里插入图片描述

要自定义weex-amap-polygon，可以从以下步骤着手：

部分实现代码如下：

- (instancetype)initWithRef:(NSString *)ref
            type:(NSString*)type
           styles:(nullable NSDictionary *)styles
         attributes:(nullable NSDictionary *)attributes
           events:(nullable NSArray *)events
        weexInstance:(WXSDKInstance *)weexInstance
{
  self = [super initWithRef:ref type:type styles:styles attributes:attributes events:events weexInstance:weexInstance];
  if (self) {
    _fillColor = [attributes map_safeObjectForKey:@"fillColor"];
    _fillOpacity = [attributes map_safeObjectForKey:@"fillOpacity"];
  }
  return self;
}

- (void)updateAttributes:(NSDictionary *)attributes
{
  if ([attributes map_safeObjectForKey:@"fillColor"]) {
    _fillColor = [attributes map_safeObjectForKey:@"fillColor"];
  }else if ([attributes map_safeObjectForKey:@"fillOpacity"]) {
    _fillOpacity = [attributes map_safeObjectForKey:@"fillOpacity"];
  }else {
    [super updateAttributes:attributes];
  }
}

2.6 weex-amap-polyline

weex-amap-polyline组件主要用于在地图上实现划线操作，其最终效果如下图：

在这里插入图片描述

在iOS中，自定义直接需要从以下几步着手：

  1. 新建DMapPolylineComponent类继承WXComponent；
  2. 在DMapViewComponent中使用mapview的addOverlay方法添加DMapPolylineComponent组件；
  3. 在DMapViewComponent重写insertSubview方法来添加子组建折线。
@implementation DMapPolylineComponent


- (instancetype)initWithRef:(NSString *)ref
            type:(NSString*)type
           styles:(nullable NSDictionary *)styles
         attributes:(nullable NSDictionary *)attributes
           events:(nullable NSArray *)events
        weexInstance:(WXSDKInstance *)weexInstance
{
  self = [super initWithRef:ref type:type styles:styles attributes:attributes events:events weexInstance:weexInstance];
  if (self) {
    NSArray * pathArray = [attributes map_safeObjectForKey:@"path"];
    if ([WXConvert isValidatedArray:pathArray]) {
      _path = pathArray;
    }
    _strokeColor = [attributes map_safeObjectForKey:@"strokeColor"];
    _strokeWidth = [[attributes map_safeObjectForKey:@"strokeWidth"] doubleValue];
    _strokeOpacity = [[attributes map_safeObjectForKey:@"strokeOpacity"] doubleValue];
    _strokeStyle = [attributes map_safeObjectForKey:@"strokeStyle"];
  }
  _viewLoaded = NO;
  return self;
}

- (void)updateAttributes:(NSDictionary *)attributes
{
  NSArray * pathArray = [attributes map_safeObjectForKey:@"path"];
  DMapViewComponent *parentComponent = (DMapViewComponent *)self.supercomponent;
  if (pathArray) {
    if ([WXConvert isValidatedArray:pathArray]) {
      _path = pathArray;
    }
    [parentComponent removeOverlay:self];
    [parentComponent addOverlay:self];
    return;
  }else if ([attributes map_safeObjectForKey:@"strokeColor"]) {
    _strokeColor = [attributes map_safeObjectForKey:@"strokeColor"];
  }else if ([[attributes map_safeObjectForKey:@"strokeWidth"] doubleValue] >= 0) {
    _strokeWidth = [[attributes map_safeObjectForKey:@"strokeWidth"] doubleValue];
  }else if ([[attributes map_safeObjectForKey:@"strokeOpacity"] doubleValue] >= 0) {
    _strokeOpacity = [[attributes map_safeObjectForKey:@"strokeOpacity"] doubleValue];
  }else if ([attributes map_safeObjectForKey:@"strokeStyle"]) {
    _strokeStyle = [attributes map_safeObjectForKey:@"strokeStyle"];
  }
  [parentComponent updateOverlayAttributes:self];
}

@end

地图组件扩展

当然，我们也可以不使用weex-amap，而是直接使用高德地图进行扩展。

3.1 weex-amap

例如，我们自己扩展一个基于原生高德SDK生成的weex-amap组件。

在这里插入图片描述

要实现这么一个地图显示的功能，实现的步骤如下：

实现代码可以参考下面的代码：

 @Override
  protected FrameLayout initComponentHostView(@NonNull Context context) {
    mapContainer = new FrameLayout(context) {
      @Override
      public boolean onInterceptTouchEvent(MotionEvent ev) {
        // 解决与Scroller的滑动冲突
        if (ev.getAction() == MotionEvent.ACTION_UP) {
          requestDisallowInterceptTouchEvent(false);
        } else {
          requestDisallowInterceptTouchEvent(true);
        }
        return false;
      }
    };
    mapContainer.setBackgroundColor(fakeBackgroundColor);
    if (context instanceof Activity) {
      mActivity = (Activity) context;
    }

    return mapContainer;
  }

  @Override
  protected void setHostLayoutParams(FrameLayout host, int width, int height, int left, int right, int top, int bottom) {
    super.setHostLayoutParams(host, width, height, left, right, top, bottom);
    if (!isMapLoaded.get() && !isInited.get()) {
      isInited.set(true);
      mapContainer.postDelayed(new Runnable() {
        @Override
        public void run() {
          mMapView = new TextureMapView(getContext());
          mapContainer.addView(mMapView, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
              ViewGroup.LayoutParams.MATCH_PARENT));
          WXLogUtils.e(TAG, "Create MapView " + mMapView.toString());
          initMap();
        }
      }, 0);
    }
  }

  private void initMap() {
    mMapView.onCreate(null);
    isMapLoaded.set(false);
    if (mAMap == null) {
      mAMap = mMapView.getMap();

      mAMap.setInfoWindowAdapter(new InfoWindowAdapter(this));
      mAMap.setOnMapLoadedListener(new AMap.OnMapLoadedListener() {
        @Override
        public void onMapLoaded() {
          WXLogUtils.e(TAG, "Map loaded");
          isMapLoaded.set(true);
          mZoomLevel = mAMap.getCameraPosition().zoom;
          mMapView.postDelayed(new Runnable() {
            @Override
            public void run() {
              execPaddingTasks();
            }
          }, 16);
        }
      });

      // 绑定 Marker 被点击事件
      mAMap.setOnMarkerClickListener(new AMap.OnMarkerClickListener() {
        // marker 对象被点击时回调的接口
        // 返回 true 则表示接口已响应事件，否则返回false
        @Override
        public boolean onMarkerClick(Marker marker) {

          if (marker != null) {
            for (int i = 0; i < getChildCount(); i++) {
              if (getChild(i) instanceof DMapMarkerComponent) {
                DMapMarkerComponent child = (DMapMarkerComponent) getChild(i);
                if (child.getMarker() != null && child.getMarker().getId() == marker.getId()) {
                  child.onClick();
                }
              }
            }
          }
          return false;
        }
      });
      mAMap.setOnCameraChangeListener(new AMap.OnCameraChangeListener() {

        private boolean mZoomChanged;

        @Override
        public void onCameraChange(CameraPosition cameraPosition) {
          mZoomChanged = mZoomLevel != cameraPosition.zoom;
          mZoomLevel = cameraPosition.zoom;
        }

        @Override
        public void onCameraChangeFinish(CameraPosition cameraPosition) {
          if (mZoomChanged) {

            float scale = mAMap.getScalePerPixel();
            float scaleInWeex = scale / WXViewUtils.getWeexPxByReal(scale);

            VisibleRegion visibleRegion = mAMap.getProjection().getVisibleRegion();
            WXLogUtils.d(TAG, "Visible region: " + visibleRegion.toString());
            Map<String, Object> region = new HashMap<>();
            region.put("northeast", convertLatLng(visibleRegion.latLngBounds.northeast));
            region.put("southwest", convertLatLng(visibleRegion.latLngBounds.southwest));

            Map<String, Object> data = new HashMap<>();
            data.put("targetCoordinate", cameraPosition.target.toString());
            data.put("zoom", cameraPosition.zoom);
            data.put("tilt", cameraPosition.tilt);
            data.put("bearing", cameraPosition.bearing);
            data.put("isAbroad", cameraPosition.isAbroad);
            data.put("scalePerPixel", scaleInWeex);
            data.put("visibleRegion", region);
            getInstance().fireEvent(getRef(), WeexConstant.EVENT.ZOOM_CHANGE, data);
          }
        }
      });

      mAMap.setOnMapTouchListener(new AMap.OnMapTouchListener() {
        boolean dragged = false;

        @Override
        public void onTouch(MotionEvent motionEvent) {

          switch (motionEvent.getAction()) {
            case MotionEvent.ACTION_MOVE:
              dragged = true;
              break;
            case MotionEvent.ACTION_UP:
              if (dragged)
                getInstance().fireEvent(getRef(), WeexConstant.EVENT.DRAG_CHANGE);
              dragged = false;
              break;
          }
        }
      });
      setUpMap();
    }
  }
}

3.2 weex-amap-info-window

当然，我们也可以使用它实现weex-amap-info-window功能，虽然weex-amap-info-window已经被内置到weex-amap中。是的的思路如下：

新建DMapViewMarkerComponent类继承WXComponent；

在DMapViewComponent中使用mapview的addMarker方法添加DMapViewMarkerComponent组件 。

在DMapViewComponent中使用mapview的addMarker方法添加DMapViewMarkerComponent组件 。

private static class InfoWindowAdapter implements AMap.InfoWindowAdapter {

    private DMapViewComponent mWXMapViewComponent;

    InfoWindowAdapter(DMapViewComponent wxMapViewComponent) {
      mWXMapViewComponent = wxMapViewComponent;
    }

    @Override
    public View getInfoWindow(Marker marker) {
      return render(marker);
    }

    @Override
    public View getInfoContents(Marker marker) {
      return null;
//      return render(marker);
    }

    private View render(Marker marker) {
      WXMapInfoWindowComponent wxMapInfoWindowComponent = mWXMapViewComponent.mInfoWindowHashMap.get(marker.getId());
      if (wxMapInfoWindowComponent != null) {
        WXFrameLayout host = wxMapInfoWindowComponent.getHostView();
//        WXFrameLayout content = (WXFrameLayout) host.getChildAt(0);
        host.getLayoutParams().width = ViewGroup.LayoutParams.WRAP_CONTENT;
        host.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        WXLogUtils.d(TAG, "Info size: " + host.getMeasuredWidth() + ", " + host.getMeasuredHeight());
        return host;
      } else {
        WXLogUtils.e(TAG, "WXMapInfoWindowComponent with marker id " + marker.getId() + " not found");
      }
      return null;
    }
  }

html5地图组件扩展

当然，我们可以使用对html5的amap进行扩展，例如扩展weex-amap。

4.1 weex-amap

在这里插入图片描述

示例代码如下：

<template> 
  <div class="amap-page-container">
   <el-amap ref="map" vid="amapDemo" :amap-manager="amapManager" :center="center" :zoom="zoom" :plugin="plugin" :events="events" class="amap-demo">
   </el-amap>

   <div class="toolbar">
    <button @click="getMap()">get map</button>
   </div>
  </div>
 </template>

 <style>
  .amap-demo {
   height: 300px;
  }
 </style>

 <script>
  // NPM 方式
  // import { AMapManager } from 'vue-amap';
  // CDN 方式
  let amapManager = new VueAMap.AMapManager();
  module.exports = {
   data: function() {
    return {
     amapManager,
     zoom: 12,
     center: [121.59996, 31.197646],
     events: {
      init: (o) => {
       console.log(o.getCenter())
       console.log(this.$refs.map.$$getInstance())
       o.getCity(result => {
        console.log(result)
       })
      },
      'moveend': () => {
      },
      'zoomchange': () => {
      },
      'click': (e) => {
       alert('map clicked');
      }
     },
     plugin: ['ToolBar', {
      pName: 'MapType',
      defaultType: 0,
      events: {
       init(o) {
        console.log(o);
       }
      }
     }]
    };
   },

   methods: {
    getMap() {
     // amap vue component
     console.log(amapManager._componentMap);
     // gaode map instance
     console.log(amapManager._map);
    }
   }
  };
</script>

4.2 weex-amap-marker

在这里插入图片描述

实现代码如下：

<template> 
  <div class="amap-page-container">
   <el-amap vid="amapDemo" :zoom="zoom" :center="center" class="amap-demo">
    <el-amap-marker vid="component-marker" :position="componentMarker.position" :content-render="componentMarker.contentRender" ></el-amap-marker>
    <el-amap-marker v-for="(marker, index) in markers" :position="marker.position" :events="marker.events" :visible="marker.visible" :draggable="marker.draggable" :vid="index"></el-amap-marker>
   </el-amap>
   <div class="toolbar">
    <button type="button" name="button" v-on:click="toggleVisible">toggle first marker</button>
    <button type="button" name="button" v-on:click="changePosition">change position</button>
    <button type="button" name="button" v-on:click="chnageDraggle">change draggle</button>
    <button type="button" name="button" v-on:click="addMarker">add marker</button>
    <button type="button" name="button" v-on:click="removeMarker">remove marker</button>
   </div>
  </div>
 </template>

 <style>
  .amap-demo {
   height: 300px;
  }
 </style>

 <script>
  const exampleComponents = {
   props: ['text'],
   template: `<div>text from parent: {{text}}</div>`
  }
  module.exports = {
   name: 'amap-page',
   data() {
    return {
     count: 1,
     slotStyle: {
      padding: '2px 8px',
      background: '#eee',
      color: '#333',
      border: '1px solid #aaa'
     },
     zoom: 14,
     center: [121.5273285, 31.21515044],
     markers: [
      {
       position: [121.5273285, 31.21515044],
       events: {
        click: () => {
         alert('click marker');
        },
        dragend: (e) => {
         console.log('---event---: dragend')
         this.markers[0].position = [e.lnglat.lng, e.lnglat.lat];
        }
       },
       visible: true,
       draggable: false,
       template: '<span>1</span>',
      }
     ],
     renderMarker: {
      position: [121.5273285, 31.21715058],
      contentRender: (h, instance) => {
       // if use jsx you can write in this
       // return <div style={{background: '#80cbc4', whiteSpace: 'nowrap', border: 'solid #ddd 1px', color: '#f00'}} onClick={() => ...}>marker inner text</div>
       return h(
        'div',
        {
         style: {background: '#80cbc4', whiteSpace: 'nowrap', border: 'solid #ddd 1px', color: '#f00'},
         on: {
          click: () => {
           const position = this.renderMarker.position;
           this.renderMarker.position = [position[0] + 0.002, position[1] - 0.002];
          }
         }
        },
        ['marker inner text']
       )
      }
     },
     componentMarker: {
      position: [121.5273285, 31.21315058],
      contentRender: (h, instance) => h(exampleComponents,{style: {backgroundColor: '#fff'}, props: {text: 'father is here'}}, ['xxxxxxx'])
     },
     slotMarker: {
      position: [121.5073285, 31.21715058]
     }
    };
   },
   methods: {
    onClick() {
     this.count += 1;
    },
    changePosition() {
     let position = this.markers[0].position;
     this.markers[0].position = [position[0] + 0.002, position[1] - 0.002];
    },
    chnageDraggle() {
     let draggable = this.markers[0].draggable;
     this.markers[0].draggable = !draggable;
    },
    toggleVisible() {
     let visableVar = this.markers[0].visible;
     this.markers[0].visible = !visableVar;
    },
    addMarker() {
     let marker = {
      position: [121.5273285 + (Math.random() - 0.5) * 0.02, 31.21515044 + (Math.random() - 0.5) * 0.02]
     };
     this.markers.push(marker);
    },
    removeMarker() {
     if (!this.markers.length) return;
     this.markers.splice(this.markers.length - 1, 1);
    }
   }
  };
</script>

4.3 weex-amap-info-window

在这里插入图片描述

<template> 
  <div class="amap-page-container">
   <el-amap vid="amap" :zoom="zoom" :center="center" class="amap-demo">
    <el-amap-info-window
     :position="currentWindow.position"
     :content="currentWindow.content"
     :visible="currentWindow.visible"
     :events="currentWindow.events">
    </el-amap-info-window>
   </el-amap>
   <button @click="switchWindow(0)">Show First Window</button>
   <button @click="switchWindow(1)">Show Second Window</button>
  </div>
 </template>

 <style>
  .amap-demo {
   height: 300px;
  }
 </style>

 <script>
  module.exports = {
   data () {
    return {
     zoom: 14,
     center: [121.5273285, 31.21515044],
     windows: [
      {
       position: [121.5273285, 31.21515044],
       content: 'Hi! I am here!',
       visible: true,
       events: {
        close() {
         console.log('close infowindow1');
        }
       }
      }, {
       position: [121.5375285, 31.21515044],
       content: 'Hi! I am here too!',
       visible: true,
       events: {
        close() {
         console.log('close infowindow2');
        }
       }
      }
     ],
     slotWindow: {
      position: [121.5163285, 31.21515044]
     },
     currentWindow: {
      position: [0, 0],
      content: '',
      events: {},
      visible: false
     }
    }
   },

   mounted() {
    this.currentWindow = this.windows[0];
   },

   methods: {
    switchWindow(tab) {
     this.currentWindow.visible = false;
     this.$nextTick(() => {
      this.currentWindow = this.windows[tab];
      this.currentWindow.visible = true;
     });
    }
   }
  };
</script>

API

当然，除了组件之外，我们还可以使用weex-amap的API来直接操作地图。

5.1 骑行路径Android实现

- (void)searchRidingRouteFromLat:(int)fromLat fromLng:(int)fromLng toLat:(int)toLat toLng:(int)toLng {

  AMapRidingRouteSearchRequest *request = [[AMapRidingRouteSearchRequest alloc] init];
  request.origin = [AMapGeoPoint locationWithLatitude:INT_2_FLOAT(fromLat) / 1000000
                       longitude:INT_2_FLOAT(fromLng) / 1000000];
  request.destination = [AMapGeoPoint locationWithLatitude:INT_2_FLOAT(toLat) / 1000000
                          longitude:INT_2_FLOAT(toLng) / 1000000];
  //发起路径搜索
  [self.aMapSearch AMapRidingRouteSearch:request];
}

- (void)onRouteSearchDone:(AMapRouteSearchBaseRequest *)request response:(AMapRouteSearchResponse *)response {
  if(response.route == nil) {
    return;
  }
  //通过AMapNavigationSearchResponse对象处理搜索结果
  AMapRoute *route = response.route;
  if (route.paths.count > 0) {
    AMapPath *amapPath = route.paths[0];
    NSArray *coordArray = amapPath.steps;
    NSMutableArray *mArray = [NSMutableArray array];
    NSArray *start = @[[NSString stringWithFormat:@"%f", request.origin.longitude], [NSString stringWithFormat:@"%f", request.origin.latitude]];
    [mArray insertObject:start atIndex:0];
    for (AMapStep *step in coordArray) {
      NSString *polistring = step.polyline;
      NSArray *array = [polistring componentsSeparatedByString:@";"];
      for (NSString *str in array) {
        NSArray *loc =[str componentsSeparatedByString:@","];
        [mArray addObject:loc];
      }
    }
    NSArray *end = @[[NSString stringWithFormat:@"%f", request.destination.longitude], [NSString stringWithFormat:@"%f", request.destination.latitude]];
    [mArray insertObject:end atIndex:mArray.count];
    [[DMessageChannelManager shared] postMessage:@"mapLines" andData:@{@"result": @"success", @"data": @{@"mapLines":mArray}}];
  }
}

- (void)AMapSearchRequest:(id)request didFailWithError:(NSError *)error
{
  NSLog(@"Error: %@", error);
}

@end

5.2 骑行路径iOS实现

private RouteTask.OnRouteCalculateListener calculateListener = new RouteTask.OnRouteCalculateListener() {
    @Override
    public void onRouteCalculate(RideRouteResult result, int code) {
      HashMap<String, Object> res = new HashMap<>(2);
      if (code == 1000 && result != null) {
        Map<String, Object> data = new HashMap<>(1);
        data.put("mapLines", getLatLngList(result.getPaths().get(0), routeTask.getStartPoint(), routeTask.getEndPoint()));
        res.put("result", "success");
        res.put("data", data);
      } else {
        res.put("result", "fail");
      }
      String dataJson = new Gson().toJson(res);
      NotifyDataManager.getInstance().postMessage("mapLines", dataJson);
      WXLogUtils.d("RideRouteResult Json: " + dataJson);
    }
  };
     routeTask.addRouteCalculateListener(calculateListener);

  /**
   * 通过首尾经纬度计算走路规划路径中所有经纬度
   *
   * @param fromLat
   * @param fromLng
   * @param toLat
   * @param toLng
   */
  @JSMethod
  public void searchRidingRouteFromLat(float fromLat, float fromLng, float toLat, float toLng) {
    LocationEntity fromLe = new LocationEntity();
    fromLe.lat = fromLat / 1e6;
    fromLe.lng = fromLng / 1e6;
    LocationEntity toLe = new LocationEntity();
    toLe.lat = toLat / 1e6;
    toLe.lng = toLng / 1e6;
    if (routeTask == null) {
      routeTask = RouteTask.getInstance(mWXSDKInstance.getContext());
      routeTask.addRouteCalculateListener(calculateListener);
    }
    routeTask.search(fromLe, toLe);
  }

5.3 骑行路径Web实现

 let stream = weex.requireModule('stream')
  stream.fetch({
   timeout:20000,
   method: 'GET',
   url: 'https://restapi.amap.com/v4/direction/bicycling?key=87453539f02a65cd6585210fa2e64dc9&origin='+fromLng/1000000+','+fromLat/1000000+'&destination='+toLng/1000000+','+toLat/1000000,
 }, (response) => {
  if (response.status == 200) {
   let apiData = JSON.parse(response.data)

   if(apiData.data){
    var polyline= new Array(); 
    polyline[0] = apiData.data.origin.split(",");
    var polylineList = apiData.data.paths['0'].steps[0].polyline.split(";");

    for(var i=0;i<polylineList.length;i++) {
     var polylinePoint = polylineList[i].split(",");
     polyline.push(polylinePoint);
    }
    polyline.push(apiData.data.destination.split(",")); //字符分割 
    callback({"result":"success","data": {"mapLines":polyline}});

   }
  }
 }, () => {})
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