PresentViewController崩溃了我的应用程序

时间:2014-05-08 09:43:36

标签: ios uialertview presentviewcontroller

当我尝试从UIAlertview按钮呈现视图控制器时,我遇到了一个非常奇怪的错误。 它在prsentViewController行崩溃了。 Backtrace显示它无法加载View。我怎样才能解决这个问题?源代码如下:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView == _alertView) {
        switch (buttonIndex) {
            case 0:
            {
                [alertView dismissWithClickedButtonIndex:buttonIndex animated:YES];
            }

                break;

            default:
            {
                NSString *nibName = IS_IPAD? NSStringFromClass([UINewUserAccountViewController class]) : [NSStringFromClass([UINewUserAccountViewController class]) stringByAppendingString:@"~iPhone"];
                UINewUserAccountViewController *newUserAccountViewController = [[UINewUserAccountViewController alloc] initWithNibName:nibName  bundle:nil];
                newUserAccountViewController.delegate = self;

                UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:newUserAccountViewController];
                [self presentViewController:navi animated:YES completion:nil];

            }
                break;
        }
    }

}

1 个答案:

答案 0 :(得分:0)

在@rckoenes的帮助下,当我得到异常后,我终于找到了几次错误。它停在UIViewController loadFromNibName,因为行

[NSStringFromClass([UINewUserAccountViewController class]) stringByAppendingString:@"~iPhone"]

返回一个nib名称,但在具有该名称的xib文件中,根视图不是文件出口。将视图链接到文件出口后,异常就消失了。