UIAlertController提示消息設置左對齊

UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"提示" message:msg preferredStyle:(UIAlertControllerStyleAlert)]; UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"我知道了" style:(UIAlertActionStyleCancel) handler:^(UIAlertAction * _Nonnull action) { }]; ///設置左對齊 UILabel *label1 = [alertVC.view valueForKeyPath:@"_titleLabel"]; UILabel *label2 = [alertVC.view valueForKeyPath:@"_messageLabel"]; label1.textAlignment = NSTextAlignmentLeft; label2.textAlignment = NSTextAlignmentLeft; [alertVC addAction:cancel]; [self presentViewController:alertVC animated:YES completion:nil];