swift - uiAlertController 有时不解雇

Question

我有一个登录按钮，它是 http 获取服务 我运行一个弹出警报等待用户点击按钮并在我获取数据时关闭它。

但有时加载警报很糟糕。在 iPhone 5s 上测试它但在模拟器上正常工作。我做错了什么？？

    @IBAction func loginButton(_ sender: Any) {


        phone=phoneText.text!

       if (validation(phone: phone)){

            popUpLoading()


           guard let url=URL(string: address+"uSers/checkUser/\(phone)") else{return}


            print(url)
            var requst=URLRequest(url: url)

            requst.httpMethod="GET"


            URLSession.shared.dataTask(with: requst, completionHandler: { (data, response, error) in

                if let response=response{
                    //print(response)
                }
                if let data=data{



                    do{


                        let json=try? JSONSerialization.jsonObject(with: data, options:JSONSerialization.ReadingOptions.mutableLeaves) as! [String:Any]

                        print("jsom : ",json)

                        DispatchQueue.main.async {

                            self.popalert.dismiss(animated: true, completion: {

                                let data=json?["data"] as! String

                                print("data : ",data)

}
}

popalert 变量声明为全局变量

这是等待的弹出警报:

func popUpLoading(){


    DispatchQueue.main.async {

        self.popalert = UIAlertController(title: "", message: "wait...", preferredStyle: .alert)

        let loadingIndicator = UIActivityIndicatorView(frame: CGRect(x: 10, y: 5, width: 50, height: 50))
        loadingIndicator.hidesWhenStopped = true
        loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.gray
        loadingIndicator.startAnimating();
        self.present(self.popalert, animated: true, completion: nil)

        self.popalert.view.addSubview(loadingIndicator)


    }

}

Answer 1

你已经调用了 dismiss 函数，它是，

(self.popalert.dismiss(动画:真，完成:{)

在响应调用中。因此，仅当您从 URL 获得正确响应时，警报 View 才会被隐藏。

您应该在这两种情况下隐藏警报 View - 所以对 if 语句使用 else 条件并关闭 alertView