macos - 我如何在 OSX 上制作这个 iOS 动画？

Question

我在 iOS 中有一个非常简单的动画，可以淡出一个 View ，调整容器大小以适合另一个 View ，然后淡入另一个 View 。这很容易做到，也非常简单。

我一直在尝试在 OSX 上做一些几乎与此类似的事情，但我一直不知道如何去做。与 iOS 相比，OSX 上的动画感觉非常笨重和困难。

任何帮助将不胜感激!!

谢谢! :)

// Fade out viewOne, resize frame to fit viewTwo, fade in viewTwo
[UIView animateWithDuration: 0.15
        animations: ^{
            [viewOne setAlpha:0.0];
        }
        completion: ^(BOOL finished) {
            [UIView animateWithDuration: 0.2
                    animations: ^{
                        [self setFrame: [viewTwo frame]];
                    }
                    completion: ^(BOOL finished) {
                        [viewTwo setAlpha: 0.0];
                        [self addSubview: viewTwo];
                        [UIView animateWithDuration: 0.15
                                animations: ^{
                                    [viewTwo setAlpha:1.0];
                                }];
                    }];
         }];

Answer 1

我编写了一个小类，它使用 block 来完成与上面在 OSX 上使用动画代理代理时基本相同的事情。

请注意，此类不是线程安全的，并且没有经过任何特定或压力测试。

//Interface
@interface MZAnimator : NSObject{}

+ (void)animateWithDuration:(NSTimeInterval)duration 
                  animation:(void (^)(void))animationBlock;
+ (void)animateWithDuration:(NSTimeInterval)duration 
                  animation:(void (^)(void))animationBlock
                 completion:(void (^)(void))completionBlock;
@end


//Implementation
@interface MZAnimator ()
+ (void)runEndBlock:(void (^)(void))completionBlock;
@end

@implementation MZAnimator

+ (void)animateWithDuration:(NSTimeInterval)duration 
                  animation:(void (^)(void))animationBlock
{
  [self animateWithDuration:duration animation:animationBlock completion:nil];
}
+ (void)animateWithDuration:(NSTimeInterval)duration 
                  animation:(void (^)(void))animationBlock
                 completion:(void (^)(void))completionBlock
{
  [NSAnimationContext beginGrouping];
  [[NSAnimationContext currentContext] setDuration:duration];
  animationBlock();
  [NSAnimationContext endGrouping];

  if(completionBlock)
  {
    id completionBlockCopy = [[completionBlock copy] autorelease];
    [self performSelector:@selector(runEndBlock:) withObject:completionBlockCopy afterDelay:duration];
  }
}

+ (void)runEndBlock:(void (^)(void))completionBlock
{
  completionBlock();
}
@end