UIImageview Fade

Question

我试图让我的图像淡出并淡入，当我点击我的按钮时。这段代码有什么问题吗？当我点击我的按钮时，我的图像保持可见。

- (IBAction)Alpha:(id)sender { 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; 
    [UIView setAnimationDuration:2]; 
    _image.alpha = 1; 
    [UIView commitAnimations]; 
    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)]; 
    } 
-(void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context { 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:2]; 
    _image.alpha = 0; 
    [UIView commitAnimations]; 
} 

Answer 1

您正在调用UIVIew上的方法，而不是您想要淡入的UIImageView实例上的方法。

你要像

[self.myImageView beginAnimations....