ios - UIAlertViewStyleLoginAndPasswordInput 占位符文本不会设置

Question

我有一个使用 UIAlertViewStyleLoginAndPasswordInput 警报 View 的应用程序。一切正常，除了密码字段的占位符文本有一些奇怪的行为。在我的 SIM 卡上，无论我将其设置为什么，它都拒绝更改“密码”。而且我一直有报告说它在“密码”和我希望设置的值之间翻转。这似乎与 iOS7 相关。

我试图在“willPresentAlertView”委托(delegate)中设置这些值。

- (void)willPresentAlertView:(UIAlertView *)alertView
{
    ...


   else if (alertView.tag == UIAlertViewTagInactivityTimeOut)
   {
    badgeNumberTextField = [alertView textFieldAtIndex:0];
    verifyBadgeNumberTextField = [alertView textFieldAtIndex:1];

    [badgeNumberTextField setPlaceholder:@"Badge Number"];
    [verifyBadgeNumberTextField setPlaceholder:@"Verify Badge Number"];

    [verifyBadgeNumberTextField setSecureTextEntry:NO];

    [badgeNumberTextField setFont:[UIFont systemFontOfSize:ALERT_VIEW_TEXTFIELD_TEXT_FONT]];
    [verifyBadgeNumberTextField setFont:[UIFont systemFontOfSize:ALERT_VIEW_TEXTFIELD_TEXT_FONT]];

    [badgeNumberTextField setKeyboardType:UIKeyboardTypeNamePhonePad];
    [verifyBadgeNumberTextField setKeyboardType:UIKeyboardTypeNamePhonePad];

    [badgeNumberTextField setClearButtonMode:UITextFieldViewModeWhileEditing];
    [verifyBadgeNumberTextField setClearButtonMode:UITextFieldViewModeWhileEditing];

    [badgeNumberTextField setDelegate:self];
    [verifyBadgeNumberTextField setDelegate:self];

    ...
     //other code 
  }
}

Answer 1

您是否尝试过设置创建 UIAlertView 的占位符？

试试这个:

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Title" message:@"Message" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Login", nil];
alert.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput;
[alert textFieldAtIndex:0].placeholder = @"Username placeholder";
[alert textFieldAtIndex:1].placeholder = @"Password placeholder";
[alert show];