如何逐漸減慢旋轉動畫

Question

我正在開發輪盤應用程序。其中，如果我點擊中心按鈕輪應旋轉幾秒鐘，然後其速度應逐漸減慢。如果有人知道，請以正確的方式引導我。

我能夠以一定的速度旋轉imageView，但我正在努力逐漸減慢車輪的速度。

輪換代碼

CALayer *layer = container.layer; 
CAKeyframeAnimation *animation; 
animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"]; 
animation.duration = 1.5f; 
animation.cumulative = YES; 
animation.repeatCount = 1; 
animation.values = [NSArray arrayWithObjects:  // i.e., Rotation values for the 3 keyframes, in RADIANS 
        [NSNumber numberWithFloat:0.0 * M_PI], 
        [NSNumber numberWithFloat:0.75 * M_PI], 
        [NSNumber numberWithFloat:1.5 * M_PI], nil]; 
animation.keyTimes = [NSArray arrayWithObjects:  // Relative timing values for the 3 keyframes 
         [NSNumber numberWithFloat:0], 
         [NSNumber numberWithFloat:.5], 
         [NSNumber numberWithFloat:1.0], nil]; 
animation.timingFunctions = [NSArray arrayWithObjects: 
          [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn], // from keyframe 1 to keyframe 2 
          [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut], nil]; // from keyframe 2 to keyframe 3 
animation.removedOnCompletion = NO; 
animation.fillMode = kCAFillModeForwards; 
[layer addAnimation:animation forKey:nil]; 

Answer 1

望着文檔爲CAKeyframeAnimation，你有timingFunctions屬性添加寬鬆等

https://developer.apple.com/library/mac/#documentation/GraphicsImaging/Reference/CAKeyframeAnimation_class/Introduction/Introduction.html