NSViewAnimation选项NSAnimationNonblockingThreaded把动画放到另一个线程中执行

    NSViewAnimation执行的动画的选项有三个，分别是：NSAnimationBlocking(阻塞)、NSAnimationNonblocking(非阻塞)、NSAnimationNonblockingThreaded(把动画放到另外的线程中)。 

    苹果官方文档中，关于NSAnimationNonblockingThreaded的说明:

                    If the constant is NSAnimationNonblocking, the animation runs in the main thread in one of the standard run-loop modes or in a mode returned from          

            runLoopModesForAnimating. If animationBlockingMode isNSAnimationNonblockingThreaded, a new thread is spawned to run the animation.

     实例:

        NSRect firstViewFrame;

        NSRect newViewFrame;

        NSMutableDictionary* firstViewDict;

        firstViewDict = [NSMutableDictionarydictionaryWithCapacity:3];

        firstViewFrame = [fromView frame];

        [firstViewDict setObject:fromViewforKey:NSViewAnimationTargetKey];

        [firstViewDict setObject:[NSValuevalueWithRect:firstViewFrame]  forKey:NSViewAnimationStartFrameKey];

        newViewFrame = firstViewFrame;

        newViewFrame.origin.x =self.frame.size.width;

        [firstViewDict setObject:[NSValuevalueWithRect:newViewFrame] forKey:NSViewAnimationEndFrameKey];

         NSViewAnimation *_slideAnimation = [[NSViewAnimationalloc] init];

         [_slideAnimation setDuration:0.5];         

         [_slideAnimationsetAnimationBlockingMode:NSAnimationNonblockingThreaded];

         _slideAnimation.delegate =self;

         [_slideAnimationsetViewAnimations:[NSArray arrayWithObjects:firstViewDict, nil]];

         [_slideAnimation startAnimation];

        // 动画的回调

        - (void)animationDidEnd:(NSAnimation*)animation {

                 [fromViewremoveFromSuperview];

        }