iOS轮盘动态 iOS实现轮盘动态效果
小白yige 人气:0一个常用的绘图,主要用来打分之类的动画,效果如下。
主要是iOS的绘图和动画,本来想用系统自带动画实现呢,发现实现不了,用了其他办法延时并重绘视图没有成功,用了gcd延时,nsthread休眠,performselector delay 都不行。最后用了一个定时器实现类似效果,总感觉不太明智,以后应该考虑下对CALayer和
隐式动画的角度考虑下
#import <UIKit/UIKit.h> /** * 自定义变量里面以s结尾的表示具体的数值,否则表示的是表示显示具体内容的标签,以lbe的表示对内容的说明 比如comments 表示的具体评价内容,comment 表示评价的具体内容,lbecomment 是一个显示 "评价:"的标签 */ @interface ScorePlateView : UIView /*速度满意度*/ @property (nonatomic,assign) CGFloat speedValues; /*态度满意度*/ @property (nonatomic,assign) CGFloat altitudeValues; /*把半圆分割的份数*/ @property (nonatomic,assign) int precision; /** * 整体评价 */ @property (nonatomic,strong) NSString * comments; /** * 满分是多少分 */ @property (nonatomic,assign) CGFloat fullValues; /** * 综合评分 */ @property (nonatomic,assign) CGFloat compreValues; /** * 开始角度 */ @property (nonatomic,assign) CGFloat startAngle; /** * 终止角度 */ @property (nonatomic,assign) CGFloat endAngle; //-(void)startAnimation; @end
#import "ScorePlateView.h" @interface ScorePlateView() { CGFloat d_speed;//执行动画时候每个的增量 CGFloat d_altitude; CGFloat d_comp; } @property (nonatomic,strong) UILabel*lbeCompreValue;//综合分数的标签 @property (nonatomic,strong) UILabel *compreValue;//综合分数的具体数值 @property (nonatomic,strong) UILabel * comment;//评价 @property (nonatomic,assign) CGFloat cur_speedV;//当前的值 @property (nonatomic,assign) CGFloat cur_altitudeV;//当前的态度; @property (nonatomic,assign) CGFloat cur_compV;//当前的综合分数 @property (nonatomic,assign) NSTimer * timer; @end @implementation ScorePlateView - (instancetype)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { self.precision= 50;//这里设置默认值; self.fullValues =5; self.altitudeValues=3.0; self.speedValues=4.0; self.backgroundColor = [UIColor clearColor]; self.startAngle=0.1*M_PI; self.endAngle = 0.9*M_PI; self.comments =@"真是太不可思议了"; self.backgroundColor = [UIColor greenColor]; _cur_compV=0; _cur_speedV=0; _cur_altitudeV=0; } return self; } - (void)drawRect:(CGRect)rect { //1. 画圆 CGFloat circleMargin = 0; //上下两个半圆的间距 CGFloat topBottomMargin =20;//这个间距用来显示服务态度和服务速度那样标签内容 CGFloat radius = (self.frame.size.height-circleMargin-2*topBottomMargin)/2;//半径 //上边圆的圆心 CGPoint centerTop = CGPointMake(self.frame.size.width/2,self.frame.size.height/2-circleMargin/2); [self drawHalfCircle:centerTop andWithRadius:radius isTop:YES]; //下面圆的圆心 CGPoint centerBottom = CGPointMake(self.frame.size.width/2, self.frame.size.height/2+circleMargin/2); [self drawHalfCircle:centerBottom andWithRadius:radius isTop:NO]; //2. 创建需要的标签,并在合适的位置绘制内容 UILabel * lbeAltitude = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width, topBottomMargin)]; lbeAltitude.text = @"服务速度"; lbeAltitude.textColor = [UIColor whiteColor]; lbeAltitude.textAlignment = NSTextAlignmentCenter; lbeAltitude.font = [UIFont systemFontOfSize:12]; [lbeAltitude drawTextInRect:lbeAltitude.frame]; //服务态度评分 UILabel * lbeSpeed = [[UILabel alloc]initWithFrame:CGRectMake(0, self.frame.size.height-topBottomMargin, self.frame.size.width, topBottomMargin)]; lbeSpeed.text = @"服务态度"; lbeSpeed.textColor = [UIColor whiteColor]; lbeSpeed.textAlignment = NSTextAlignmentCenter; lbeSpeed.font = [UIFont systemFontOfSize:12]; [lbeSpeed drawTextInRect:lbeSpeed.frame]; //绘制综合评分 NSString *attitudeScore = [NSString stringWithFormat:@"%.2f/%.2f",_cur_altitudeV,self.fullValues]; NSMutableAttributedString* attributeString = [[NSMutableAttributedString alloc]initWithString:attitudeScore]; [attributeString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:26] range:NSMakeRange(0, 4)]; [attributeString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:16] range:NSMakeRange(4, 3)]; self.compreValue = [[UILabel alloc]initWithFrame:CGRectMake(0, radius-topBottomMargin,self.frame.size.width, 2*topBottomMargin)]; self.compreValue.attributedText = attributeString; self.compreValue.textAlignment = NSTextAlignmentCenter; self.compreValue.textColor = [UIColor whiteColor]; self.compreValue.frame = CGRectMake(0, centerTop.y-topBottomMargin+circleMargin/2, self.frame.size.width, topBottomMargin*2); [self.compreValue drawTextInRect:self.compreValue.frame]; self.lbeCompreValue = [[UILabel alloc]initWithFrame:CGRectMake(0, centerTop.y-radius*0.5, self.frame.size.width, topBottomMargin*2)]; self.lbeCompreValue.text =@"综合评分"; self.lbeCompreValue.textAlignment = NSTextAlignmentCenter; self.lbeCompreValue.textColor = [UIColor whiteColor]; self.lbeCompreValue.font = [UIFont systemFontOfSize:14]; [self.lbeCompreValue drawTextInRect:self.lbeCompreValue.frame]; //评价内容 self.comment = [[UILabel alloc]initWithFrame:CGRectMake(topBottomMargin+circleMargin+radius/2, CGRectGetMaxY(self.compreValue.frame), radius, topBottomMargin*2)]; self.comment.text =self.comments; self.comment.numberOfLines=0; self.comment.textAlignment = NSTextAlignmentCenter; self.comment.textColor = [UIColor whiteColor]; self.comment.font = [UIFont systemFontOfSize:14]; [self.comment drawTextInRect:self.comment.frame]; } /** * 画半圆 绘制刻度的时候可以先绘制从圆心的线,最后用一个内圆裁剪的方式,但是如果要求背景随时变化就局限了,特别是父视图背景是渐变的,要么重新定义该类,要么把这个类视图定义为透明,从而透过父视图背景颜色 透明的背景无法掩盖从圆心出发的线, * * @param center 圆心坐标 * @param radius 半径 * @param top 是不是画上面的圆 */ -(void)drawHalfCircle:(CGPoint) center andWithRadius:(CGFloat)radius isTop:(BOOL) top { //画上面圆的边框 CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextSetStrokeColorWithColor(ctx, [UIColor whiteColor].CGColor); if (top) { CGContextAddArc(ctx, center.x, center.y, radius, -self.startAngle, -self.endAngle, 1); } else { CGContextAddArc(ctx, center.x, center.y, radius,self.startAngle,self.endAngle, 0); } //设置线的宽度 CGContextSetLineWidth(ctx, 1); CGContextSetStrokeColorWithColor(ctx, [UIColor whiteColor].CGColor); CGContextStrokePath(ctx); //绘制上下圆的分割线 CGContextSetLineWidth(ctx, 2);//设置线宽 CGFloat borderValue; if (top) { borderValue=_cur_altitudeV/self.fullValues;//设置边界值 } else { borderValue =_cur_speedV/self.fullValues; } //实现动画效果,只能先画刻度,再画具体值 for (int i=1; i<self.precision; i++)//画刻度 { CGContextSetRGBStrokeColor(ctx, 1.0, 1.0, 1.0, 0.5);//设置白色 透明 CGFloat endX,endY,startX,startY;//刻度的长度是这里 7 -2 =5; if (top) { startX = center.x -(radius-10)*cos((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle); startY = center.y - (radius-10)*sin((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle); endX = center.x - (radius-2)*cos((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle);//圆上的点的x坐标 endY = center.y - (radius-2)*sin((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle);//圆上的点的y坐标 } else { startX = center.x +(radius-10)*cos((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle); startY = center.y + (radius-10)*sin((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle); endX = center.x + (radius-2)*cos((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle);//圆上的点的x坐标 endY = center.y + (radius-2)*sin((double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle);//圆上的点的y坐标 } CGContextMoveToPoint(ctx, startX, startY); CGContextAddLineToPoint(ctx, endX, endY); CGContextStrokePath(ctx); } for (int i=1; i<self.precision; i++) { CGFloat curAngle =(double)i/self.precision*(self.endAngle-self.startAngle)+self.startAngle; if ((double)i/(double)self.precision<borderValue) { CGContextSetRGBStrokeColor(ctx, 1.0, 1.0, 1.0, 1);//设置白色 不透明 CGFloat endX,endY,startX,startY;//刻度的长度是这里 7 -2 =5; if (top) { startX = center.x -(radius-10)*cos(curAngle); startY = center.y - (radius-10)*sin(curAngle); endX = center.x - (radius-2)*cos(curAngle);//圆上的点的x坐标 endY = center.y - (radius-2)*sin(curAngle);//圆上的点的y坐标 } else { startX = center.x +(radius-10)*cos(curAngle); startY = center.y + (radius-10)*sin(curAngle); endX = center.x + (radius-2)*cos(curAngle);//圆上的点的x坐标 endY = center.y + (radius-2)*sin(curAngle);//圆上的点的y坐标 } CGContextMoveToPoint(ctx, startX, startY); CGContextAddLineToPoint(ctx, endX, endY); CGContextStrokePath(ctx); } } } - (void)didMoveToSuperview { self.timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(update) userInfo:nil repeats:YES]; d_comp = self.compreValues/20; d_speed= self.speedValues/20; d_altitude=self.speedValues/20; } -(void)update { _cur_altitudeV+=d_altitude; _cur_speedV+=d_speed; _cur_compV+=d_comp; if (_cur_altitudeV>self.altitudeValues) { _cur_altitudeV =self.altitudeValues; } if (_cur_speedV > self.speedValues) { _cur_speedV=self.speedValues; } if (_cur_compV>self.compreValues) { _cur_compV=self.compreValues; } if ( _cur_compV==self.compreValues&&_cur_speedV==self.speedValues&&_cur_altitudeV ==self.altitudeValues) { [self.timer invalidate]; self.timer = nil; } //self.backgroundColor = [UIColor colorWithRed:arc4random()%255/255.0 green:arc4random()%255/255.0 blue:arc4random()%255/255.0 alpha:1]; [self setNeedsDisplay]; } @end
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