Show Alert with textfield in Objective-C

AlertWithTextField.m

@implementation AlertWithTextField

- (void)showAlertInViewController:(UIViewController *)vc{
	UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"New Name"
	
	__weak typeof(ViewController) *weakSelf = self;
	
	[alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
		textField.placeholder = @"Enter name";
	}];
	
	UIAlertAction *saveAction = [UIAlertAction actionWithTitle:@"Save" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
		if (!alert.textFields) {
			return;
		}
		
		NSString *stringToSave = [alert.textFields firstObject].text;
		if (![stringToSave isEqualToString:@""]) {
			NSLog(@"Show me the input: %@", stringToSave);
		}
	}];
	
	UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel"
														   style:UIAlertActionStyleCancel
														 handler:nil];
	
	[alert addAction:saveAction];
	[alert addAction:cancelAction];
	
	[vc presentViewController:alert animated:YES completion:nil];
}

@end