Iphone UIAlertview后数字键盘跳转

我有一个登录屏幕，当用户多次错误地输入密码时会显示一个警报。单击其中一个按钮时，将显示另一个警报视图，以确认如果我按下第二个警报视图上的取消按钮，数字键盘将从屏幕底部反弹回其原始位置。在第二次警报响应期间，未执行任何代码。有人能帮忙吗

if (loginCount < 5) {
  // Display alert to user
  UIAlertView *loginError = [[UIAlertView alloc] initWithTitle:@"Login Failure" message:@"You have entered an incorrect passcode.  Please try again." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
  [loginError show];

  } else {
    // Display alert to user, including option to reset the app as they have 5 or more login failures
    UIAlertView *loginError = [[UIAlertView alloc] initWithTitle: @"Login Failure" message: @"You have entered an incorrect passcode on 5 or more occasions.  Please try again or reset the app." delegate: self cancelButtonTitle: @"Try Again" otherButtonTitles: @"Reset App", nil]
    [loginError show];
}
// Clear password fields
[self clearPasswordFields];
[passcode1 becomeFirstResponder];
// Increment the login count
loginCount++;

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {

    // If the user has chosen to reset the app, alert with a confirmation first before resetting
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
    if ([title isEqualToString:@"Reset App"]) {
        // Create alert to give the user the choice to confirm reset
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Confirm Reset" message:@"Are you sure you wish to Reset?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
        [alert show];
    } else if ([title isEqualToString:@"Yes"] && buttonIndex == 1) {
        [Utilities resetApp];
        [self dismissViewControllerAnimated:NO completion:nil];
    }
}

if（loginCount<5）{
//向用户显示警报
UIAlertView*loginError=[[UIAlertView alloc]initWithTitle:@“登录失败”消息：@“您输入了错误的密码。请重试。”委托：自取消按钮提示：@“解除”其他按钮提示：无]；
[登录错误显示]；
}否则{
//向用户显示警报，包括重置应用程序的选项，因为他们有5次或更多登录失败
UIAlertView*loginError=[[UIAlertView alloc]initWithTitle:@“登录失败”消息：@“您在5次或更多情况下输入了错误的密码。请重试或重置应用程序。”代理：自取消按钮：@“重试”其他按钮：@“重置应用程序”，无]
[登录错误显示]；
}
//清除密码字段
[自清除密码字段]；
[密码1成为第一响应者]；
//增加登录计数
loginCount++；
-（无效）alertView:（UIAlertView*）alertView单击按钮索引：（NSInteger）按钮索引{
//如果用户已选择重置应用程序，请在重置前先发出确认警报
NSString*标题=[alertView buttonTitleAtIndex:buttonIndex]；
如果（[标题isEqualToString:@“重置应用程序”]）{
//创建警报，让用户选择确认重置
UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@“确认重置”消息：@“是否确实要重置？”代理：自取消按钮：@“否”其他按钮：@“是”，无]；
[警报显示]；
}else if（[title IsequalString:@“Yes”]&&buttonIndex==1）{
[应用程序]；
[自我解除视图控制器激活：未完成：无]；
}
}

我将这样做

在头文件中：

UIAlertView *loginError;

在实现文件中：

-(void)textFieldDidEndEditing:(UITextField *)textField
{
  if (loginCount < 5) {
  // Display alert to user
  loginError = [[UIAlertView alloc] initWithTitle:@"Login Failure" message:@"You have entered an incorrect passcode.  Please try again." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
  [loginError show];

  } else {
    // Display alert to user, including option to reset the app as they have 5 or more login failures
    loginError = [[UIAlertView alloc] initWithTitle: @"Login Failure" message: @"You have entered an incorrect passcode on 5 or more occasions.  Please try again or reset the app." delegate: self cancelButtonTitle: @"Try Again" otherButtonTitles: @"Reset App", nil]
    [loginError show];
}
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {

    // If the user has chosen to reset the app, alert with a confirmation first before resetting
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
    if ([title isEqualToString:@"Reset App"]) {
        [self showSecondAlert];
    } else if ([title isEqualToString:@"Yes"] && buttonIndex == 1) {
        [Utilities resetApp];
        [self dismissViewControllerAnimated:NO completion:nil];
    }else{
      [self clearPasswordFields];
      [passcode1 becomeFirstResponder];
    }
}

-(void)showSecondAlert
{
        //make sure you dismiss the old alertview first
         [loginError dismissWithClickedButtonIndex:0  animated:NO];
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Confirm Reset" message:@"Are you sure you wish to Reset?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
        [alert show];
}

-（void）textfieldDendediting:（UITextField*）textField
{
如果（登录计数<5）{
//向用户显示警报
loginError=[[UIAlertView alloc]initWithTitle:@“登录失败”消息：@“您输入了错误的密码。请重试。”委托：自取消按钮：@“解除”其他按钮：无]；
[登录错误显示]；
}否则{
//向用户显示警报，包括重置应用程序的选项，因为他们有5次或更多登录失败
loginError=[[UIAlertView alloc]initWithTitle:@“登录失败”消息：@“您在5次或更多情况下输入了错误的密码。请重试或重置应用程序。”委托：自取消按钮：@“重试”其他按钮：@“重置应用程序”，无]
[登录错误显示]；
}
}
-（无效）alertView:（UIAlertView*）alertView单击按钮索引：（NSInteger）按钮索引{
//如果用户已选择重置应用程序，请在重置前先发出确认警报
NSString*标题=[alertView buttonTitleAtIndex:buttonIndex]；
如果（[标题isEqualToString:@“重置应用程序”]）{
[自我提醒]；
}else if（[title IsequalString:@“Yes”]&&buttonIndex==1）{
[应用程序]；
[自我解除视图控制器激活：未完成：无]；
}否则{
[自清除密码字段]；
[密码1成为第一响应者]；
}
}
-（无效）showSecondAlert
{
//确保先关闭旧的alertview
[loginError dismissWithClickedButtonIndex:0动画：否]；
UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@“确认重置”消息：@“是否确实要重置？”代理：自取消按钮：@“否”其他按钮：@“是”，无]；
[警报显示]；
}

希望这有助于