如何添加Instagram模型'like'動畫？

Question

我試圖開發一個顯示圖像提要的iphone應用程序。在應用程序中有喜歡ang不喜歡的功能。我需要類似於Instagram的效果。

喜歡與不喜歡有獨立的圖像..

我對如何做到這一點困惑。所以我沒有做任何編碼。

是否有任何示例代碼，庫可用？

感謝名單..

Answer 1

在你 - （無效）viewDidLoad中

UITapGestureRecognizer *oneFingerTwoTaps = 
     [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneFingerTwoTaps)] autorelease]; 

    // Set required taps and number of touches 
    [oneFingerTwoTaps setNumberOfTapsRequired:2]; 
    [oneFingerTwoTaps setNumberOfTouchesRequired:1]; 

    // Add the gesture to the view/UIImageView 
    [[self view] addGestureRecognizer:oneFingerTwoTaps]; 

相反的[自視]使用您的UIImageView。

您在圖像

- (void)oneFingerTwoTaps 
{ 
    // Action for Fade In the "Heart" 
    UIImage *image = [UIImage imageNamed:@"yourlikeimageoverlay.png"]; 
UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; 


//Add the image view to your main view 
//(This is optional if it was created with Interface Builder) 
... 


CABasicAnimation *theAnimation; 

//within the animation we will adjust the "opacity" 
//value of the layer 
theAnimation=[CABasicAnimation animationWithKeyPath:@"opacity"]; 
//animation lasts 0.4 seconds 
theAnimation.duration=0.4; 
//and it repeats forever 
theAnimation.repeatCount= 1e100f; 
//we want a reverse animation 
theAnimation.autoreverses=YES; 
//justify the opacity as you like (1=fully visible, 0=unvisible) 
theAnimation.fromValue=[NSNumber numberWithFloat:1.0]; 
theAnimation.toValue=[NSNumber numberWithFloat:0.1]; 

//Assign the animation to your UIImage layer and the 
//animation will start immediately 
[imageView.layer addAnimation:theAnimation 
       forKey:@"animateOpacity"]; 
}