UIAlertController 标题文字大小 颜色

NSString *title = [NSString stringWithFormat:@"\n恭喜您获得%d个红包\n", ];

    NSString *msg = @"\n把红包分享给微信好友，金额随机，可用于购买雪票和雪卡";

    UIAlertController * alert = [UIAlertController alertControllerWithTitle:title

                                                                    message:msg

                                                             preferredStyle:UIAlertControllerStyleActionSheet];

// titile字号处理

    NSMutableAttributedString *hogan = [[NSMutableAttributedString alloc] initWithString:title];

    [hogan addAttribute:NSFontAttributeName

                  value:[UIFont systemFontOfSize:20.0]

                  range:NSMakeRange(, title.length)];

    [alert setValue:hogan forKey:@"attributedTitle"];

//

    UIAlertAction *sureAction = [UIAlertAction actionWithTitle:@"给好友发红包" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        [self shareAction];

    }];

    [alert addAction:sureAction];

    alert.view.tintColor = APP_MAIN_COLOR;

    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消"

                                                           style:UIAlertActionStyleCancel

                                                         handler:nil];

    [alert addAction:cancelAction];

    [self presentViewController:alert animated:YES completion:nil];