SVProgressHUD很简单的两行代码

//显示内容 
[SVProgressHUD showWithStatus:@"加载中。。。"];
//取消显示
 [SVProgressHUD dismiss];
//可以延时
 dispatch_after(dispatch_time(DISPATCH_TIME_NOW,  (int64_t)(3*NSEC_PER_SEC)), dispatch_get_main_queue(),^{
        
    });