微信小程序实现图片轮播及文件上传

时间:2020-05-15 人气:0

微信小程序实现图片轮播及文件上传

刚刚接触微信小程序，看着网上的资源写了个小例子，本地图片轮播以及图片上传。

图片轮播：

index.js

<span style="font-size:14px;">var app = getApp()  
Page({ 
  data:{ 
     mode: 'aspectFit', 
   // src:'../images/timg1.jpg', 
    imgUrls:[ 
      '../images/1.jpg', 
      '../images/2.jpg', 
      '../images/3.jpg', 
       
      '../images/4.jpg' 
    ], 
  indicatorDots: true,  //是否出现焦点 
  autoplay: true,  //是否自动播放 
  interval: 2000,  //自动播放时间间隔 
  duration: 1000,  //滑动动画时间 
  userInfo: {}  
  }, 
  onLoad:function(){ 
    console.log('onLoad Test'); 
  } 
})</span>

注：imgUrls中为本地图片数组。

index.wxml:

<swiper indicator-dots = "{{indicatorDots}}" autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}"> 
<block wx:for="{{imgUrls}}"> 
  <swiper-item class="swiper_i"> 
    <image src="{{item}}" mode="{{mode}}" class="slide-image" /> 
  </swiper-item> 
  </block> 
</swiper>

index.json:

{ 
  "navigationBarTitleText": "相册" 
}

index.wxss:

.slide-image{ 
  width:100%; 
  height:100%; 
} 
.swiper_i{ 
  text-align: center; 
  width:100%; 
}

好了，这是图片轮播的几个文件。会在app.json中配置。

接下来是图片上传的。因为没有服务器，暂时不能上传，但是可以从本地相册或拍照获取照片。

upload.js:

var app = getApp()  
Page({ 
  data:{ 
  // text:"这是一个页面" 
  source: '', 
  tt:false 
 }, 
 /** 
  * 选择相册或者相机 配合上传图片接口用 
  */ 
 onLoad: function() { 
   var that = this; 
   wx.chooseImage({ 
     count: 1, 
     //original原图，compressed压缩图 
     sizeType: ['original'], 
     //album来源相册 camera相机  
     sourceType: ['album', 'camera'], 
     //成功时会回调 
     success: function(res) { 
       //重绘视图 
       that.setData({ 
         source: res.tempFilePaths, 
         tt:true 
       }) 
       /* var tempFilePaths = res.tempFilePaths 
      wx.uploadFile({ 
      url: 'https://', //仅为示例，非真实的接口地址 
      filePath: tempFilePaths[0], 
      name: 'file', 
      formData:{ 
      'user': 'test' 
      }, 
      success: function(res){ 
      var data = res.data 
      /https://img.qb5200.com/download-x/do something 
      } 
    })*/ 
     } 
   }) 
 }, 
 /*onHide:function(){ 
   this.setData({ 
     source:'' 
   }) 
 }*/ 
})

upload.json:

{ 
  "navigationBarTitleText": "上传图片" 
}

upload.wxml:

<view class="Container"> 
<image src="{{source}}" mode="aspectFit" class="image-i"/> 
<block wx:if="{{tt}}"> 
  <button type="primary" bindtap="listenerButtonChooseImage">确认上传</button> 
</block> 
</view>

upload.wxss:

/* pages/upload/upload.wxss */ 
.Container{ 
  text-align:center; 
  width:100%; 
} 
.image-i{ 
  width:100%; 
  height:100%; 
}

app.js为空。

app.json:

{ 
 "pages": [      
  "pages/index/index", 
  "pages/upload/upload" 
 ],  
 "window": {      
  "navigationBarTextStyle": "black", 
  "navigationBarTitleText": "演示2", 
  "navigationBarBackgroundColor": "#fbf9fe", 
  "backgroundColor": "#fbf9fe" 
 }, 
 "networkTimeout": {     
  "request": 10000, 
  "connectSocket": 10000, 
  "uploadFile": 10000, 
  "downloadFile": 10000 
 }, 
 "tabBar": {     
  "list": [{ 
   "pagePath": "pages/index/index", 
   "text": "显示图片", 
   "iconPath": "pages/images/icon_API.png", 
   "selectedIconPath": "pages/images/icon_API_HL.png" 
  },{ 
   "pagePath": "pages/upload/upload", 
   "text": "上传", 
   "iconPath": "pages/images/icon_API.png", 
   "selectedIconPath": "pages/images/icon_API_HL.png" 
  }] 
 }, 
 "debug": true 
  
}

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