未使用 NSAnimationContext 调用 CAAnimation animationDidStop

Posted 2023-03-13

【中文标题】未使用 NSAnimationContext 调用 CAAnimation animationDidStop

【英文标题】：CAAnimation animationDidStop not called with NSAnimationContext

【发布时间】：2012-08-17 11:42:06

【问题描述】：

我正在使用这段代码为 NSScrollView 滚动制作动画：

    [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。 我已经阅读了几行代码，使用 CAAnimation 可以轻松实现，但我做不到。

我已经尝试了以下代码：

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

(void)animationDidStop:(CAAnimation *)动画完成:(BOOL)flag

NSLog(@"STOP!");

有人可以帮助我吗？

谢谢！

【参考方案1】：

你可以使用这个功能：

[[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];

【参考方案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"];