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.使用 FMDB,把接收的数据存在本地的 sqlite
,每次取一个数据,动画执行完删除当前数据,再取下一条数据
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(@"stopAnimation:%@",[self.paomaLabel.layer animationForKey:@"paoMaDeng"]); // 记录运行的动画的时间 _pmAniamtion.timeOffset = anim.timeOffset; // 如果回到前台 NSString *backStr = [_defaults objectForKey:@"isBack"]; if ([backStr intValue] == 0) { if ([self.paomaLabel.layer animationForKey:@"paoMaDeng"] == anim) { [_timer invalidate]; _timer = nil; // 动画停止之后,将实例置为 nil _pmAniamtion = nil; CCPaomaModel *model = [[CCPaomaModel alloc]init]; // 删除第一个数据 [model deleteRow:_array[0]]; // 重新再取一次数据(一个) _array = [model selectTable]; // 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); } }else{ // 暂停定时器 [_timer setFireDate:[NSDate distantFuture]]; } }
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
- (void)viewWillAppear:(BOOL)animated { [_paomaView resumeAnimation]; if (_paomaView.hidden == YES) { [_paomaView showPaomaView:self.view]; } if (_paomaView.array.count > 0) { [self.view addSubview:_paomaView]; } } - (void)viewWillDisappear:(BOOL)animated { [_paomaView pauseAnimation]; [_paomaView.timer invalidate]; _paomaView.timer = nil; }
6.记录回到后台,判断是否执行添加动画方法
- (void)resumeAnimation { if (_array.count > 0) { CFTimeInterval pausedTime = [_paomaLabel.layer timeOffset]; _paomaLabel.layer.speed = 1.0; _paomaLabel.layer.timeOffset = 0.0; _paomaLabel.layer.beginTime = 0.0; CFTimeInterval timeSincePause = [_paomaLabel.layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime; _paomaLabel.layer.beginTime = timeSincePause; // 是否进入后台 _defaults = [NSUserDefaults standardUserDefaults]; NSString *backStr = [_defaults objectForKey:@"isBack"]; if ([backStr intValue] == 1) { // 开启定时器 [_timer setFireDate:[NSDate distantPast]]; int anmationCount = [_array[2] intValue]; NSLog(@"恢复之后的次数:%d",anmationCount); if (anmationCount > 0) { _pmAniamtion.repeatCount = anmationCount; [_paomaLabel.layer addAnimation:_pmAniamtion forKey:@"paoMaDeng"]; } [_defaults setObject:@"0" forKey:@"isBack"]; } } }
话不多说,github 见代码 ( https://github.com/slodier/CCScoops ),觉得好给个 star 呗
转载注明出处: http://www.cnblogs.com/asamu/p/5976557.html