UIAlertController text alignment

Question

Is there a way to change the alignment of the message displayed inside a UIAlertController on iOS 8?

I believe accessing the subviews and changing it for the UILabel is not possible anymore.

Answer 1

I have successfully used the following, for both aligning and styling the text of UIAlertControllers:

let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = NSTextAlignment.Left  let messageText = NSMutableAttributedString(     string: "The message you want to display",     attributes: [         NSParagraphStyleAttributeName: paragraphStyle,         NSFontAttributeName : UIFont.preferredFontForTextStyle(UIFontTextStyleBody),         NSForegroundColorAttributeName : UIColor.blackColor()     ] )  myAlert.setValue(messageText, forKey: "attributedMessage") 

You can do a similar thing with the title, if you use "attributedTitle", instead of "attributedMessage"

Swift 3 update

The above still works in Swift 3, but the code has to be slightly altered to this:

let messageText = NSMutableAttributedString(     string: "The message you want to display",     attributes: [         NSParagraphStyleAttributeName: paragraphStyle,         NSFontAttributeName : UIFont.preferredFont(forTextStyle: UIFontTextStyle.body),         NSForegroundColorAttributeName : UIColor.black     ] )  myAlert.setValue(messageText, forKey: "attributedMessage") 

Swift 4 update

let messageText = NSMutableAttributedString(     string: "The message you want to display",     attributes: [         NSAttributedStringKey.paragraphStyle: paragraphStyle,         NSAttributedStringKey.font: UIFont.preferredFont(forTextStyle: UIFontTextStyle.body),         NSAttributedStringKey.foregroundColor: UIColor.black     ] )  myAlert.setValue(messageText, forKey: "attributedMessage") 

Swift 5 update

let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = alignment let messageText = NSAttributedString(     string: "message",     attributes: [         NSAttributedString.Key.paragraphStyle: paragraphStyle,         NSAttributedString.Key.foregroundColor : UIColor.primaryText,         NSAttributedString.Key.font : UIFont(name: "name", size: size)     ] )  myAlert.setValue(messageText, forKey: "attributedMessage") 

Answer 2

Use the below code

UIAlertController * alert = [UIAlertController                                  alertControllerWithTitle:[title lowercaseString]                                  message:[message lowercaseString]                                  preferredStyle:UIAlertControllerStyleAlert];      if (alertStyle == kUIAlertStylePlainText)     {         [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {          }];     }      if (okTitle) {         UIAlertAction* ok = [UIAlertAction actionWithTitle:[okTitle lowercaseString] style:UIAlertActionStyleDefault                                                    handler:^(UIAlertAction * action) {                                                        callback(alert, action, nil);                                                    }];         [alert addAction:ok];     }      if (cancelTitle) {         UIAlertAction* cancel = [UIAlertAction actionWithTitle:[cancelTitle lowercaseString] style:UIAlertActionStyleDefault                                                        handler:^(UIAlertAction * action) {                                                            callback(alert, nil, action);                                                        }];         [alert addAction:cancel];     }       NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc] init];     paraStyle.alignment = NSTextAlignmentLeft;      NSMutableAttributedString *atrStr = [[NSMutableAttributedString alloc] initWithString:[message lowercaseString] attributes:@{NSParagraphStyleAttributeName:paraStyle,NSFontAttributeName:[UIFont systemFontOfSize:13.0]}];      [alert setValue:atrStr forKey:@"attributedMessage"];     [viewInstance presentViewController:alert animated:YES completion:nil];