ios - 如何快速使用 MBProgressHUD

Question

这是我的代码，但它显示了进度。这段代码有错误吗？请提供一些解决此问题的想法，或提供一些与此相关的链接。

class Approval: UIViewController {

var hud: MBProgressHUD = MBProgressHUD()

override func viewDidLoad() {
    super.viewDidLoad()

    fetchData()
}
   func fetchData(){
      hud.show(true)
      // doing some http request
      dispatch_async(dispatch_get_main_queue()) {
         hud.hide(true)          
      }
   }

}

Answer 1

更新的答案:

let loadingNotification = MBProgressHUD.showAdded(to: view, animated: true)
loadingNotification.mode = MBProgressHUDMode.indeterminate
loadingNotification.label.text = "Loading"

关闭 ProgressHUD:

MBProgressHUD.hideAllHUDs(for: view, animated: true)