UIAlertController在iOS 9中不起作用 [英] UIAlertController not working in iOS 9

问题描述

我添加了显示登录名和密码文本字段的UIAlertController代码，它适用于iOS 8，但在iOS 9中不起作用.文本字段缩小，如下图所示:

I have added the UIAlertController code showing login and password textfields, it works for iOS 8 but in iOS 9 not works. The textfields shrinks as shown in figure below

我正在尝试的代码如下:

The code I am trying is as follows :

 - (void)toggleLoginLdap:(UIViewController *)currentVC
 {

 if ([UIAlertController class])
        {


            self.alertController= [UIAlertController
                                       alertControllerWithTitle:@"Title of Msg"
                                       message:@"Hello"
                                       preferredStyle:UIAlertControllerStyleAlert];

            UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
                                                       handler:^(UIAlertAction * action){
                                                           NSString *userName = self.alertController.textFields[0].text;
                                                           NSString *password = self.alertController.textFields[1].text;



                                                       }];
            UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel
                                                           handler:^(UIAlertAction * action) {


                                                               [self.alertController dismissViewControllerAnimated:YES completion:nil];

                                                           }];


            [self.alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
                 textField.placeholder = @"Username/Email";
                 //textField.preservesSuperviewLayoutMargins = YES;
                textField.autoresizesSubviews = YES;
            }];
            [self.alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
                textField.placeholder = @"Password";
                textField.secureTextEntry = YES;
            }];
            //alertController.view.autoresizesSubviews = YES;
            [self.alertController addAction:ok];
            [self.alertController addAction:cancel];
            [currentVC presentViewController:self.alertController animated:YES completion:nil];
 }

也尝试在rootviewcontroller上显示，但是没有运气，相同的代码在ios 8上也可以运行.该项目很旧，并且得到了iOS 5的支持.我们将不胜感激.谢谢.

Also tried to show on rootviewcontroller but no luck , same code works on ios 8. Project is old and having support from iOS 5. Any help will be appreciated. Thanks.

推荐答案

在添加alertController之后添加[self.alertController.view layoutIfNeeded] 我遇到了同样的问题，并且奏效了

add [self.alertController.view layoutIfNeeded] after presenting alertController I had the same problem and it worked

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