Question

我希望Alamofire将数据上传到服务器并取决于结果：

隐藏进度警报，关闭当前视图控制器，显示祝贺警报
隐藏进度提示，显示错误提醒

我的代码在iOS 9和11上工作正常，但在成功案例的iOS 10上只隐藏进度警报。用户感到困惑并一次又一次地提交表单

Alamofire.upload(multipartFormData: { MultipartFormData in
MultipartFormData.append((self.model.name?.data(using: String.Encoding.utf8)!)!, withName: "Form[name]")
MultipartFormData.append((self.model.category?.description.data(using: String.Encoding.utf8)!)!, withName: "Form[category]")
    if (self.filePreview.count>0) {
        for (index,preview) in self.filePreview.enumerated() {
                if preview != nil 
                    let data = UIImageJPEGRepresentation((preview?.getImage())!, 80)
                    MultipartFormData.append(data!, withName: "Form[files]["+String(describing:index)+"]", fileName: "attachment"+String(describing: index)+".JPG", mimeType: preview!.getMime())
                }
            }
        }
        debugPrint(MultipartFormData)
        }, to: url, encodingCompletion: { (result) in
            switch result {
            case .success( _, _, _):
                progressAlert.dismiss(animated: true, completion: nil)
                self.dismiss(animated: true, completion: nil)
                let doneAlert = UIAlertController(title: "Success", message: "Your message was sent", preferredStyle: .alert)
                let donedOk = UIAlertAction(title: "OK", style: .default, handler: nil)
                doneAlert.addAction(donedOk)
                self.present(doneAlert, animated: true, completion: nil)
                break
            case .failure( _):
                progressAlert.dismiss(animated: true, completion: nil)
                let doneAlert = UIAlertController(title: "Failed", message: "Your message was not sent", preferredStyle: .alert)
                let donedOk = UIAlertAction(title: "OK", style: .default, handler: nil)
                doneAlert.addAction(donedOk)
                self.present(doneAlert, animated: true, completion: nil)
                break
            }
        })

Answer 1

使用completition处理程序并使用UIApplication.shared.keyWindow?.rootViewController查找当前顶级ViewController解决的问题。将显示进度警报隐藏，当前视图控制器关闭和成功警报。代码：

progressAlert.dismiss(animated: true) {
    let doneAlert = UIAlertController(title: "Отправлено", message: "Your message was sent", preferredStyle: .alert)
    let donedOk = UIAlertAction(title: "Success", style: .default, handler: nil)
    doneAlert.addAction(donedOk)
    self.dismiss(animated: true) {
        let presentingVC = UIApplication.shared.keyWindow?.rootViewController
        presentingVC?.present(doneAlert, animated: true, completion: nil)
    }
}

Answer 2

在控制器上显示UIAlertController而其视图不在窗口层次结构中时出现问题，首先您要关闭控制器＆amp;在被解雇的控制器上提出UIAlertController。

您必须参考当前控制器正在呈现的控制器，然后解除前一个控制器上的当前控制器UIAlertController。

更新主调度队列上的用户界面。

DispatchQueue.main.async {
    let controller = self.presentingViewController
    self.dismiss(animated: true) {
         let doneAlert = UIAlertController(title: "Success", message: "Your message was sent", preferredStyle: .alert)
         let donedOk = UIAlertAction(title: "OK", style: .default, handler: nil)
         doneAlert.addAction(donedOk)
         controller?.present(doneAlert, animated: true, completion: nil)
    }
}

Answer 3

订单应该是。

驳回进度。
显示警告说一切都很好。（这会掩盖界面，所以不可能触摸任何背后的事情）当在第2步轻拍确定。
关闭上传控制器。

只是为了更新代码：

无需在生成的闭包输出上切换到MainQueue，Math Thompson到DispatchQueue.main.async。

所以从我的观点来看，互动应该是：

switch result {
            case .success( _, _, _):
             //1
                progressAlert.dismiss(animated: true, completion: nil)
            //2
        let doneAlertController = UIAlertController(title: "Success", message: "Your message was sent", preferredStyle: .alert)
        let donedOk = UIAlertAction(title: "OK", style: .default) { (action) in
         //3   
         self.dismiss(animated: true, completion: nil)
        }

        doneAlertController.addAction(donedOk)
        self.present(doneAlertController, animated: true, completion: nil)
                break

。。。。。

Alamofire上传完成块可在iOS 9＆amp; IOS 11但在iOS 10上却出错了

3 个答案: