0

我有一个按钮：

- (IBAction)themeBtnAction:(id)sender
{
    NSString *language = [[OnlineStore sharedStore]getTheLanguage];
        [[OnlineStore sharedStore]getTheThemeBaseGuides:language callback:^{
        [self performSegueWithIdentifier:@"from main to themecategory" sender:self];
    }]
}

但是当用户碰巧双击按钮时，它会导致崩溃。可能是因为下一个 viewcontroller 被加载到堆上两次（我的猜测），当我尝试UINavigationController从那一秒返回 pop时收到的错误消息UIViewController是：Unbalanced calls to begin/end appearance transitions for <MySecondViewController: 0xb257b80>.

我该怎么做才能防止这种情况发生？

我试图把它放在回调内：

    if ([NSStringFromClass([[viewControlles lastObject] class]) isEqualToString: @"MainViewController"]) {

我试图在 btn 的选择器 goToNextView 中进行回调

   [self performSelector:@selector(goToNextView)  withObject:self afterDelay:1.0];

没运气。有什么建议么。请询问这是否不清楚，因为我有点累，现在正要睡觉:)

4

1 回答 1

1

您可以忽略用户交互，直到视图控制器消失：

- (IBAction)themeBtnAction:(id)sender
{
    NSString *language = [[OnlineStore sharedStore]getTheLanguage];
    [[OnlineStore sharedStore]getTheThemeBaseGuides:language callback:^{
        [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
        [self performSegueWithIdentifier:@"from main to themecategory" sender:self];
    }]
}

- (void)viewDidDisappear:(BOOL)animated
{
    [[UIApplication sharedApplication] endIgnoringInteractionEvents];
}

或者只是以类似的方式禁用按钮上的用户交互：

button.userInteractionEnabled = NO;
...
button.userInteractionEnabled = YES;
于 2013-11-07T01:41:31.200 回答