同步UIView动画

Question

嗨,响应触摸事件,我的应用程序确实查看动画.如果用户真的很快并且即使在当前动画发生时再次触摸,那么一切都搞砸了.

有没有一种标准的方法来处理框架提供的这个问题？或者我是以错误的方式做动画？

目前它正在检查一个标志(animationInProgress)来处理这个问题,但我想知道这是否是我们必须采取的措施？

这是代码:

- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
    NSMutableArray *c = (NSMutableArray*)context;
    UINavigationController *nc = [c objectAtIndex:0];
    [nc.view removeFromSuperview];
    animationInProgress = NO;
}

- (void)transitionViews:(BOOL)topToBottom {
    if (animationInProgress) {
        return;
    }
    animationInProgress = YES;
    NSMutableArray *context = [[NSMutableArray alloc] init];
    [UIView beginAnimations:@"myanim" context:context];
    [UIView setAnimationDuration:0.7f];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

    UIViewController *from;
    UIViewController *to;
    if (navController3.view.superview == nil ) {
        from = navController2;
        to = navController3;
    } else {
        from = navController3;
        to = navController2;
    }

    int height;
    if (topToBottom) { 
        height = -1 * from.view.bounds.size.height;
    } else {
        height = from.view.bounds.size.height;
    }

    CGAffineTransform transform = from.view.transform;

    [UIView setAnimationsEnabled:NO];
    to.view.bounds = from.view.layer.bounds;
    to.view.transform = CGAffineTransformTranslate(transform, 0, height);
    [window addSubview:to.view];

    [UIView setAnimationsEnabled:YES];
    from.view.transform = CGAffineTransformTranslate(from.view.transform, 0, -1 * height);
    to.view.transform = transform;

    [context addObject:from];

    [UIView commitAnimations];

    return;
}

Answer 1

正如您所注意到的,框架的默认行为是允许任何事情同时发生.

如果您的目标是阻止特定动画发生,如果它已经在运行,那么使用像您正在做的标志是完全合理的.

如果您想在概念上"升级"并在动画期间停止任何触摸事件进入您的应用程序,您可以使用:

[[UIApplication sharedApplication] beginIgnoringInteractionEvents];

配对:

[[UIApplication sharedApplication] endIgnoringInteractionEvents];