学习iOS全局跑马灯

+ (instancetype)shareManager { static CCPaomaView *pModel = nil; static dispatch_once_t once; dispatch_once(&once, ^{  pModel = [[CCPaomaView alloc]initWithFrame:CGRectMake(0, 0, KScreenWidth, 0.0468 *KScreenHeight)]; }); return pModel;}

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{ NSLog(@"%@",[self.paomaLabel.layer animationForKey:@"paoMaDeng"]); if ([self.paomaLabel.layer animationForKey:@"paoMaDeng"] == anim) {  //移除第一组数据  [_array removeObjectAtIndex:0];    //移除整个 plist  [CCPaomaModel removePaomaPlist];    //重新写入  [_array writeToFile:[CCPaomaModel filename] atomically:YES];    //动画停止之后，将实例置为 nil  _pmAniamtion = nil;    //数组为空之后移除跑马灯  if (_array.count > 0) {   [self showPaomaView:self.superview];  }else{   self.hidden = YES;   [self removeFromSuperview];  }  NSLog(@"%@",self.array); }}

- (void)paomaAniamtion:(CGFloat)count{ //判断动画实例存不存在，存在继续，不存在即创建 if (_pmAniamtion == nil) {  _pmAniamtion = [CABasicAnimation animation];  _pmAniamtion.keyPath = @"transform.translation.x";  CGFloat W = CGRectGetWidth(_paomaLabel.bounds);  _pmAniamtion.fromValue = @(W);  _pmAniamtion.toValue = @(-W);  _pmAniamtion.duration = _aniTime;  _pmAniamtion.repeatCount = count;  _pmAniamtion.removedOnCompletion = NO;  //动画结束不移除  _pmAniamtion.fillMode = kCAFillModeForwards; //动画结束会保持结束的状态  _pmAniamtion.delegate = self;    //设置代理  [_paomaLabel.layer addAnimation:_pmAniamtion forKey:@"paoMaDeng"]; }else{  _pmAniamtion.repeatCount = count; }}

#pragma mark -- 界面出现、消失，创建、恢复、暂停动画- (void)viewWillAppear:(BOOL)animated { [_paomaView showPaomaView:self.view]; [_paomaView resumeAnimation];}- (void)viewWillDisappear:(BOOL)animated { [_paomaView pauseAniamtion];}