MJRefresh上拉加载功能，每次运行下面都会有“上拉加载”这

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:@"" preferredStyle: UIAlertControllerStyleAlert];
        
        //修改title和message颜色
        NSMutableAttributedString *titleHogan = [[NSMutableAttributedString alloc] initWithString:@"您已购买成功\n\n您的金卡号为：123456789"];
        [titleHogan addAttribute:NSForegroundColorAttributeName
                      value:RGBCOLOR(43, 167, 126)
                      range:NSMakeRange(0, 6)];
        [titleHogan addAttribute:NSForegroundColorAttributeName
                           value:RGBCOLOR(253, 138, 38)
                           range:NSMakeRange(15, 9)];
        [alert setValue:titleHogan forKey:@"attributedTitle"];
        [alert setValue:titleHogan forKey:@"attributedTitle"];
        
         //修改按钮背景颜色
        /*
        UIAlertAction *button = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){
        
             //点击按钮的响应事件；
            
        }];
        UIImage *accessoryImage = [UIImage imageNamed:@"btn背景.png"];
        [button setValue:accessoryImage forKey:@"image"];
        
        [alert addAction:button];
         */
        [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
            //点击按钮的响应事件；
        }]];
        //弹出提示框；
        [self presentViewController:alert animated:true completion:nil];
        
        alert.view.tintColor = [UIColor blackColor];