Question

我有一个非常简单的方法。但是在方法中，UIAlertView将无法运行....这是我的方法：

-(void)post_result {
    NSLog(@"Post Result");

    post_now.enabled = YES;
    [active stopAnimating];
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Success" message:@"You're post has been successfully uploaded." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
    [alertView show];

    success_post_facebook = 0;
    success_post_youtube = 0;
    success_post_googleplus = 0;
    success_post_tumblr = 0;
    success_post_twitter = 0;

    NSLog(@"Post Result END");
}

奇怪的是，UIAlertView之前和之后的代码将在这个方法中运行....那么地球是错的？

感谢您的时间。

Answer 1

你很可能在主线程上调用UIAlertView。要使它在主线程上运行，只需使用主调度队列，如此。

dispatch_async(dispatch_get_main_queue(), ^{
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Success" message:@"You're post has been successfully uploaded." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
    [alertView show];
});

方法没有运行 - iOS

1 个答案: