UIAlertView代理方法崩溃 [英] UIAlertView delegate method crashing

问题描述

在我的iPhone应用程序中，我有一个 NSObject 一个类和一个 UIViewController B类。我想从A调用B类中的一个实例方法。我使用以下代码。

In my iPhone app, I have a NSObjectA class and a UIViewController B class. I want to call a instance method in B class from A. I used the following code.

Bclass *vc = [[Bclass alloc]init];
[vc hideAlert:NSString];
[vc release];

和B类：

- (void)hideAlert:(NSString*)message{
    UIAlertView *shareAlrt = [[UIAlertView alloc] initWithTitle:@""
                                                        message:message
                                                       delegate:self
                                              cancelButtonTitle:@"Ok"
                                              otherButtonTitles:nil];
    [shareAlrt show];
    [shareAlrt release];
}

并调用该方法并显示一个AlertView。点击确定按钮，我想导航到Cc类。

and the method called and show a AlertView. When click on the Ok button, I want to navigate to class Cclass.

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 0)
    {
        Cclass *vc = [[Cclass alloc]initWithNibName:@"Cclass" bundle:[NSBundle mainBundle]];
        [self presentModalViewController:vc animated:NO];
        [vc release];
    }
}

但是当我点击Ok按钮，应用程序崩溃这里发生了什么？我已经在B class.h文件中添加了< UIAlertViewDelegate> ，但仍然是相同的错误。请帮助

But when I click on the Ok button, the app crashes. Whats happening here? I have added <UIAlertViewDelegate> in the B class.h file, but still the same error. Please help

我收到错误代码 ***由于未捕获异常'NSInvalidArgumentException'终止应用程序，原因：' - [__ NSCFType alertView： clickedButtonAtIndex：]：无法识别的选择器发送到实例0x81baa80'

推荐答案

只需更改方法

- (void)hideAlert:(NSString*)message{
    UIAlertView *shareAlrt = [[UIAlertView alloc] initWithTitle:@""
                                                    message:message
                                                   delegate:self
                                          cancelButtonTitle:nil
                                          otherButtonTitles:@"Ok",nil];
    [shareAlrt show];
    [shareAlrt release];
}

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