解除ViewController iOS后不播放动画

我有一个AViewController是根viewController，我有一个图像是播放动画无限循环

- (void)rotateImageView
{ 
    [UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
        [self.imageViewSpin setTransform:CGAffineTransformRotate(self.imageViewSpin.transform, M_PI_2)];
    }completion:^(BOOL finished){
        if (finished) {
            [self rotateImageView];
        }
    }];
}

在视图中将出现

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(rotateImageView) name:UIApplicationWillEnterForegroundNotification object:nil];
    [self rotateImageView];
}

如果我的应用程序处于活动状态，这将非常有效。但当我尝试演示ViewController CViewController时 [self.navigationController presentViewController:动画：完成：] 我在CViewController上有后退按钮

返回AviewController后，动画停止工作。 如何解决这个问题。 多谢各位

编辑

现在工作我只是把[自转年龄]；在postNotification的方法中

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(rotateImageView) name:UIApplicationWillEnterForegroundNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkPresentView) name:@"checkIsPresent" object:nil];
    [self rotateImageView];
}
-(void)checkPresentView{
    //isModalView = false;
    [self rotateImageView];
}

---

您不需要添加观察者，也不需要从CViewController发布通知。[self-rotateImageView]方法本身将被调用为AViewController的ViewWillDisplay，并将在解除CViewController时被调用，该post通知我用于另一件事，很抱歉，我将编辑它。因此，从视图将显示它的工作，但我的动画不循环仅运行1/4的圆，动画将停止。您可以尝试调用[view.layer removeAllAnimations]；在ViewWillAnk中，我会将其与我的工作代码合并。很好，您已使其工作，将您的编辑作为答案发布

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(rotateImageView) name:UIApplicationWillEnterForegroundNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkPresentView) name:@"checkIsPresent" object:nil];
    [self rotateImageView];
}
-(void)checkPresentView{
    //isModalView = false;
    [self rotateImageView];
}