ios - 如何将文本字段添加到警报 View ？ Xcode 4.5 iOS6

Question

如何将文本字段添加到Alertview？我正在尝试制作一个应用，其中在该应用提交编辑之前，用户必须通过在所述Alertview上键入其密码来对1st进行身份验证，但是我该怎么做？似乎我搜索过的代码不再起作用。这里是:

  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Log In" message:@"Please enter your Password" delegate:self cancelButtonTitle:@"Log In" otherButtonTitles:@"Cancel", nil];
    [alert addTextFieldWithValue:@"" label:@"Password"];
    UITextField *tf = [alert textFieldAtIndex:0];
    tf.clearButtonMode = UITextFieldViewModeWhileEditing;
    tf.keyboardType = UIKeyboardTypeAlphabet;
    tf.keyboardAppearance = UIKeyboardAppearanceAlert;
    tf.autocapitalizationType = UITextAutocapitalizationTypeWords;
    tf.autocapitalizationType = UITextAutocorrectionTypeNo;

错误说

 "No visible @interface for 'UIAlertView' 
 declares the selector 'addTextFieldWithValue:label:'" 
 on the [alert addTextFieldWithValue:@"" label:@"Password"];

我也想问一下如何将代码放在Alertview的Confirm按钮上。

Answer 1

alert.alertViewStyle = UIAlertViewStylePlainTextInput;

或者如果您需要安全的密码(用于密码)

alert.alertViewStyle = UIAlertViewStyleSecureTextInput;

编辑:

我不确定100％表示“将代码放入确认按钮”的意思，但是如果您想知道他们是否按下了确认或取消，则只需实施

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    //check the button index and do something if it's the right one.
}