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思路：
1.创建一个单例
+ (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;
}
2.把接收的数据存在本地的 plist，不适用于大量数据，每次读取第一个数据，读取完成删除整个 plist，再把剩下的重新存进 plist
3.根据动画代理，监听动画执行结束，将动画实例置为 nil
- (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);
}
}
4.判断动画实例是否为空，使得切换界面，跑马灯继续，而不是重新开始
- (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;
}
}
5.切换界面，暂停、恢复动画
#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];
}
话不多说，github 见代码
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原文地址：http://www.cnblogs.com/asamu/p/5976557.html
