在clickedButtonAtIndex中显示警报? [英] Show Alert in clickedButtonAtIndex?
本文介绍了在clickedButtonAtIndex中显示警报?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
i需要在用户按 buttonIndex 1
后显示确认提醒但是......如果我使用 popViewcontroller
在 clickedButtonAtIndex
它崩溃没有错误。
i need to show a confirm alert after the user press buttonIndex 1
but... if i use popViewcontroller
in clickedButtonAtIndex
it crash without errors.
问题在于
[self.navigationController popViewControllerAnimated:YES];
在第二次警报点击之前被调用...
is called before second Alert click...
如何解决?
这是我的代码:
- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 1) {
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle:@"OK!"
message:@"Completed"
delegate:self
cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
[alert release];
[self.navigationController popViewControllerAnimated:YES];
}
}
推荐答案
设置两个UIAlertViews的标签属性分别为1和2。然后,在委托方法中,使用if语句来检查UIAlertView参数的标记。
Set the tag properties of the two UIAlertViews to 1 and 2, respectively. Then, in the delegate method, use if statements to check the tag of the UIAlertView argument.
示例:
- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag == 1)
{
//check the button index
//create and display the other alert view (set the tag property here to 2)
}
else if (alertView.tag == 2)
{
//pop the view controller
}
}
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