IOS changes the color of the UIAlertViewController font and uialertview font

Source: Internet
Author: User

IOS changes the color of the UIAlertViewController font and uialertview font

NSString * message = @ "are you sure the information is correct? "; NSString * title = @" prompt "; UIAlertController * alertController = [UIAlertController alertControllerWithTitle: title message: message preferredStyle: UIAlertControllerStyleActionSheet]; // change the title size and color. Optional * titleAtt = [[NSMutableAttributedString alloc] initWithString: title]; [titleAtt addattriatt: NSFontAttributeName value: [UIFont systemFontOfSize: 16] range: NSMakeRange (0, title. length)]; [titleAtt addattriatt: NSForegroundColorAttributeName value: [UIColor orangeColor] range: NSMakeRange (0, title. length)]; [alertController setValue: titleAtt forKey: @ "attributedTitle"]; // change the message size and color NSMutableAttributedString * messageAtt = [[NSMutableAttributedString alloc] initWithString: message]; [messageAtt addattriatt: NSFontAttributeName value: [UIFont systemFontOfSize: 13] range: NSMakeRange (0, message. length)]; [messageAtt addattriatt: NSForegroundColorAttributeName value: [UIColor yellowColor] range: NSMakeRange (0, message. length)]; [alertController setValue: messageAtt forKey: @ "attributedMessage"]; [self presentViewController: alertController animated: YES completion: nil];

The preceding figure shows how to modify the title and message font color of UIAlertViewController, and how to modify the NSForegroundColorAttributeName color attribute and NSFontAttributeName font size attribute of attributedString. Key of the title in UIAlertViewController: @ "attributedTitle", key of the message prompted in the title: @ "attributedMessage ".

UIAlertAction * alertAction = [UIAlertAction actionWithTitle: @ "style" style: incluhandler: nil]; [alertAction setValue: [UIColor purpleColor] forKey: @ "_ titleTextColor"]; // alertController. view. tintColor = [UIColor greenColor]; [alertController addAction: alertAction]; UIAlertAction * cancel = [UIAlertAction actionWithTitle: @ "cancel" style: UIAlertActionStyleCancel handler: nil]; /* color of the cancel button */[cancel setValue: [UIColor redColor] forKey: @ "_ titleTextColor"]; [alertController addAction: cancel];

Modify the color of all buttons in UIAlertViewController using the following method:

alertController.view.tintColor = [UIColor greenColor];

Use the following method to modify the font color of a single UIAlertAction button:

[cancel setValue:[UIColor redColor] forKey:@"_titleTextColor"];

 

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