Question

喜当某些事件发生时，我会调用一些方法（游戏中的解锁奖杯）它们会出现并消失一个子视图。当这些事件同时发生并重叠时发生崩溃（正确）。我如何确保“轮到你等待”？感谢

-(void)trofeiLaunch:(int)x {


    CGRect loseFrame = CGRectMake(0, 0, 480, 320);
    TrofeoView = [[UIView alloc] initWithFrame:loseFrame];
    TrofeoView.alpha = 0.0;
    [UIView beginAnimations:nil context:self];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
    [UIView setAnimationDuration:0.5];
    [UIImageView setAnimationDelegate:self];
    TrofeoView.alpha = 1.0;
    [UIView setAnimationDidStopSelector:@selector(bridgeTrofei)];
    [UIView commitAnimations];
    [self.view addSubview:TrofeoView];
    [TrofeoView release];

            ....

}

-(void)bridgeTrofei {

TrofeoView.alpha = 1.0;
[UIView beginAnimations:nil context:self];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelegate:self];
TrofeoView.alpha = 0.0;
[UIView commitAnimations];
[self performSelector:@selector(deleteTrofei) withObject:self afterDelay:1.0];

}


-(void)deleteTrofei {


[TrofeoView removeFromSuperview];

NSLog(@"delete");

}

当这些事件同时发生并重叠时发生崩溃（正确）。我如何确保“轮到你等待”？感谢

Answer 1

如果第二个动画在第一个动画完成之前开始，TrofeoView将被重新分配，您将丢失先前的参考。当你在'trofeiLaunch：'方法中释放TrofeoView时，你也会藐视内存管理规则。您在获得所有权后再次使用此变量。你应该只发布一个对象，如果你已完成它，你不应该。

我认为沿着这条路走下去最重要的是确保三种方法引用正确的对象。默认情况下，第一个是正常的，因此您需要处理接下来的两个。我修改了你的代码来做到这一点。

- (IBAction)start {

    animatingView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
    animatingView.backgroundColor = [UIColor greenColor];
    animatingView.alpha = 0.0;
    [UIView beginAnimations:@"Trophy Display" context:animatingView];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
    [UIView setAnimationDuration:0.5];
    [UIImageView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
    animatingView.alpha = 1.0;
    [UIView commitAnimations];
    [self.window addSubview:animatingView];
}

- (void)animationDidStop:(NSString*)animationID finished:(NSNumber*)finished context:(void *)context {

    if ( [animationID isEqualToString:@"Trophy Display"] ) {
        UIView *aView = (UIView *)context;

        [UIView beginAnimations:nil context:aView];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
        [UIView setAnimationDuration:0.5];
        [UIView setAnimationDelegate:self];
        aView.alpha = 0.0;
        [UIView commitAnimations];
        [self performSelector:@selector(finishAnimation:) withObject:aView afterDelay:1.0];
    }
}

- (void)finishAnimation:(UIView*)aView {
    [aView removeFromSuperview];
    [aView release];
}

我将视图通过context传递给第二种方法，将withObject:部分传递给第三种方法。我希望代码是自我解释的。如果你没有得到这个，请告诉我。

下一点是关于这是否正确。你不能用阵列来管理吗？仅在显示屏中没有视图时才按下。

方法“轮到你了”！

1 个答案: