倒计时指示器

r囧r小猫 2022-07-18 00:17 183阅读 0赞

\#import "YGSpeedSendGiftView.h"  
  
@interface YGSpeedSendGiftView ()  
  
@property (nonatomic, strong) CAShapeLayer \*progressLayer;//设置路径  
@property (nonatomic, strong) CABasicAnimation \*strokeAnimationEnd;//动画  
@property (nonatomic, strong) CAAnimationGroup \*animationGroup;//动画组  
@property (nonatomic, assign) CGFloat progressLineWidth;//线条宽度  
@property (nonatomic, strong) UIColor \*progressLineColor;//线条颜色  
@property (nonatomic, assign) NSInteger totalTime;//倒计时时间  
@property (nonatomic,   copy) SpeedSendGiftClickBlock myBlock;//点击回调  
@property (nonatomic,   copy) CompleteBlock completeBlock;//完成回调  
@property (nonatomic, strong) NSTimer \*timer;//定时器  
@property (nonatomic, assign) NSInteger progress;  
  
@end  
  
@implementation YGSpeedSendGiftView  
  
\- (instancetype)initWithFrame:(CGRect)frame  
                    totalTime:(NSInteger)totalTime  
                    lineWidth:(CGFloat)lineWidth  
                    lineColor:(UIColor \*)lineColor  
                   clickBlock:(SpeedSendGiftClickBlock)clickBlock  
                completeBlock:(CompleteBlock)completeBlock \{  
      
    self  = \[self initWithFrame:frame\];  
      
    if (self) \{  
        //保存参数  
        self.progressLineWidth = lineWidth;  
        self.progressLineColor = lineColor;  
        self.totalTime         = totalTime;  
        self.myBlock           = clickBlock;  
        self.completeBlock     = completeBlock;  
          
        //添加绘制路线  
        \[self.layer addSublayer:self.progressLayer\];  
    \}  
    return self;  
\}  
  
//开始  
\- (void)startCountDown \{  
      
    \[self cancleTimer\];  
      
    self.hidden         = NO;  
    self.progress       = 0;  
  
    \[self addTimer\];  
      
    \[self.progressLayer addAnimation:self.strokeAnimationEnd forKey:@"group"\];  
\}  
  
//添加定时器  
\- (void)addTimer \{  
      
    if (\_timer == nil) \{  
          
        \_\_block typeof(self) blockSelf = self;  
        \_\_weak typeof(self) weakSelf   = blockSelf;  
          
        \_timer = \[NSTimer YG\_scheduledTimerWithTimeInterval:1 block:^\{  
              
            \_\_strong typeof(self)strongSelf = weakSelf;  
              
            \[strongSelf setProgressValue\];  
       
        \} repeats:YES\];  
    \}  
      
    \_timer.status = NO;  
      
    \[\[NSRunLoop currentRunLoop\] addTimer:\_timer forMode:NSDefaultRunLoopMode\];  
\}  
  
\- (void)setProgressValue \{  
      
    self.progress ++;  
      
    if (self.progress >= 30) \{  
        \[self stopCountDown\];  
    \}  
\}  
  
//停止  
\- (void)stopCountDown \{  
      
    if (!\_timer.status && \_timer) \{  
          
        if (self.strokeAnimationEnd) \{  
              
            \[self.progressLayer removeAllAnimations\];  
              
            self.hidden = YES;  
              
            \[self cancleTimer\];  
        \}  
          
        if (self.completeBlock) \{  
            \_completeBlock();  
        \}  
          
    \}  
    \_timer.status = NO;  
\}  
  
//设置路径  
\- (CAShapeLayer \*)progressLayer \{  
      
    if (!\_progressLayer) \{  
          
        \_progressLayer          = \[CAShapeLayer layer\];  
        \_progressLayer.frame    = CGRectMake(0, 0, CGRectGetWidth(self.frame), CGRectGetHeight(self.frame));  
        \_progressLayer.position = CGPointMake(CGRectGetWidth(self.frame)/2.0, CGRectGetHeight(self.frame)/2.0);  
          
        \_progressLayer.path     = \[UIBezierPath bezierPathWithArcCenter:CGPointMake(CGRectGetWidth(self.frame)/2.0,  
                                                                                    CGRectGetHeight(self.frame)/2.0)  
                                                                 radius:(CGRectGetWidth(self.frame) - self.progressLineWidth)/2.0  
                                                             startAngle:-M\_PI\_2  
                                                               endAngle:-M\_PI\_2+2\*M\_PI  
                                                              clockwise:YES\].CGPath;  
          
        \_progressLayer.fillColor   = \[UIColor clearColor\].CGColor;  
        \_progressLayer.lineWidth   = self.progressLineWidth;  
        \_progressLayer.strokeColor = self.progressLineColor.CGColor;  
        \_progressLayer.strokeEnd   = 0;  
        \_progressLayer.strokeStart = 0;  
        \_progressLayer.lineCap     = kCALineCapRound;  
    \}  
      
    return \_progressLayer;  
\}  
  
//动画  
\- (CABasicAnimation \*)strokeAnimationEnd \{  
      
    if (!\_strokeAnimationEnd) \{  
          
        \_strokeAnimationEnd = \[CABasicAnimation animationWithKeyPath:@"strokeEnd"\];  
          
        \_strokeAnimationEnd.timingFunction = \[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear\];  
        \_strokeAnimationEnd.duration       = self.totalTime;  
        \_strokeAnimationEnd.fromValue      = @1;  
        \_strokeAnimationEnd.toValue        = @0;  
        \_strokeAnimationEnd.speed          = 1.0;  
          
        \_strokeAnimationEnd.removedOnCompletion = NO;  
    \}  
      
    return \_strokeAnimationEnd;  
\}  
  
//取消定时器  
\- (void)cancleTimer \{  
      
    if (\[\_timer isValid\]) \{  
        \[\_timer invalidate\];  
        \_timer = nil;  
    \}  
\}  
  
\- (void)drawRect:(CGRect)rect \{  
      
    \[super drawRect:rect\];  
      
    UIColor \*color = UIColorFromRGBA(0x000000, 0.4);  
      
    \[color set\];  //设置线条颜色  
      
    UIBezierPath\* aPath = \[UIBezierPath bezierPathWithArcCenter:CGPointMake(CGRectGetWidth(rect)/2.0, CGRectGetHeight(rect)/2.0)  
                                                         radius:(CGRectGetWidth(rect) - \_progressLineWidth)/2.0  
                                                     startAngle:0  
                                                       endAngle:M\_PI\*2  
                                                      clockwise:YES\];  
      
    aPath.lineWidth     = \_progressLineWidth;  
    aPath.lineCapStyle  = kCGLineCapRound;  
    aPath.lineJoinStyle = kCGLineJoinRound;  
      
    \[aPath stroke\];  
\}  
  
//退到后台  
\- (void)didEnterBackground \{  
    //记录暂停时间  
    CFTimeInterval pauseTime      = \[self.progressLayer convertTime:CACurrentMediaTime() fromLayer:nil\];  
    //设置动画速度为0  
    self.progressLayer.speed      = 0;  
    //设置动画的偏移时间  
    self.progressLayer.timeOffset = pauseTime;  
      
    //暂停定时器  
    \[\_timer pause\];  
  
\}  
  
//进入前台  
\- (void)didBecomeActive \{  
    //暂停的时间  
    CFTimeInterval pauseTime = self.progressLayer.timeOffset;  
  
    //设置动画速度为1  
    self.progressLayer.speed      = 1;  
    //重置偏移时间  
    self.progressLayer.timeOffset = 0;  
    //重置开始时间  
    self.progressLayer.beginTime  = 0;  
    //计算开始时间  
    CFTimeInterval timeSincePause = \[self.progressLayer convertTime:CACurrentMediaTime() fromLayer:nil\] - pauseTime;  
    //设置开始时间  
    self.progressLayer.beginTime  = timeSincePause;  
      
    //开始定时器  
    \[\_timer resume\];  
\}  
  
@end