UIAlertView Vs UIAlertController - no keyboard in iOS 8

问题:

I have a old Xcode project that is targeted for iOS 6 and higher. I recently opened it up in Xcode 6 and ran in iPhone 6 simulator for iOS 8. When I tried this action

UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Folder Name"                                                      message:@"Keep it short and sweet"                                                     delegate:self                                            cancelButtonTitle:@"Cancel"                                            otherButtonTitles:@"OK", nil];      dialog.alertViewStyle = UIAlertViewStylePlainTextInput;     dialog.tag = 400;     [dialog show]; 

I get a pop-up window but when I click on the text field, no keyboard comes up. I googled and read that I need to use UIAlertController instead. Since I need to support iOS 6, 7 versions as well so I changed my code like this.

if ([UIAlertController class])     {         // use UIAlertController         UIAlertController *alert= [UIAlertController                                       alertControllerWithTitle:@"Enter Folder Name"                                       message:@"Keep it short and sweet"                                       preferredStyle:UIAlertControllerStyleAlert];          UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault                                                    handler:^(UIAlertAction * action){                                                        //Do Some action here                                                        UITextField *textField = alert.textFields[0];                                                        NSLog(@"text was %@", textField.text);                                                     }];         UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault                                                        handler:^(UIAlertAction * action) {                                                             NSLog(@"cancel btn");                                                             [alert dismissViewControllerAnimated:YES completion:nil];                                                         }];          [alert addAction:ok];         [alert addAction:cancel];          [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {             textField.placeholder = @"folder name";             textField.keyboardType = UIKeyboardTypeDefault;         }];          [self presentViewController:alert animated:YES completion:nil];      }     else     {         // use UIAlertView         UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Folder Name"                                                          message:@"Keep it short and sweet"                                                         delegate:self                                                cancelButtonTitle:@"Cancel"                                                otherButtonTitles:@"OK", nil];          dialog.alertViewStyle = UIAlertViewStylePlainTextInput;         dialog.tag = 400;         [dialog show];      } 

Again if I try the same action NO keyboard is displayed.

Is this a bug in Xcode 6 simulator or I am doing something wrong?

回答1:

I Tested this, if iOS8 detects a hardware keyboard , than it does not open the keypad. As you might be testing in simulator , so it is not Showing any keypad

Press "Command" + "k" and you should be able to see the keypad.

When testing on a device you will not face this issue , unless user has connected his device with a hardware Bluetooth keypad , so this is not something you should worry about

Hope this helps

回答2:

Another way of seeing the keyboard is setting a keyboard type. This could be an example code:

UIAlertController* alertController = [UIAlertController                                      alertControllerWithTitle:@"Test"                                      message:@"Testing keyboard"                                      preferredStyle:UIAlertControllerStyleAlert]; [alertController addTextFieldWithConfigurationHandler: ^(UITextField *tf)  {      tf.autocorrectionType = UITextAutocorrectionTypeYes;      tf.keyboardType = UIKeyboardTypeDefault;  }]; [self presentViewController:alertController animated:YES completion:nil]; 

Then you will see simulator's keyboard when you show the AlertController

文章来源: UIAlertView Vs UIAlertController - no keyboard in iOS 8