CAAnimation animationDidStop未与NSAnimationContext一起调用

Question

我正在用下面的代码动画一个NSScrollView滚动：

    [NSAnimationContext beginGrouping];
    NSClipView* clipView = [self contentView];
    NSPoint newOrigin = [clipView bounds].origin;
    newOrigin.x = page*kGalleryWidth;
    [[clipView animator] setBoundsOrigin:newOrigin];
    [NSAnimationContext endGrouping];

现在我正在尝试获取触发动画结束的事件。我已经阅读过一些代码，使用CAAnimation，我可以很容易地实现它，但我做不到。

我尝试了以下代码：

CAAnimation *moveAnimation = [[self.contentView animationForKey:@"frameOrigin"] copy];
moveAnimation.delegate = self;
[self.contentView setAnimations:[NSDictionary dictionaryWithObject:moveAnimation forKey:@"frameOrigin"]];

• (animationDidStop：(CAAnimation *)anim已完成：(BOOL)标志{ NSLog(@“停止！”)；

}

有人能帮我吗？

谢谢!

Answer 1

您可以使用此函数：

[[NSAnimationContext currentContext] setCompletionHandler:<#(void (^)(void))completionHandler#>]

 [NSAnimationContext beginGrouping];
    [[NSAnimationContext currentContext] setCompletionHandler:^{
        NSLog(@"animation stop!");
    }];
    NSClipView* clipView = [self contentView];
    NSPoint newOrigin = [clipView bounds].origin;
    newOrigin.x = page*kGalleryWidth;
    [[clipView animator] setBoundsOrigin:newOrigin];
    [NSAnimationContext endGrouping];

Answer 2

[UIView beginAnimations:@"goback" context:nil];
[UIView setAnimationDuration:0.3f];
[UIView setAnimationBeginsFromCurrentState:NO];
dragOperation.draggable.center =dragOperation.initialPoint;
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector: @selector(animationDidStop:finished:context:)];
UIView commitAnimations];




-(void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
    [self.layer removeAnimationForKey:@"goback"];
}