如何上传用户个人资料图片 [英] How to upload a user profile image

问题描述

我正在尝试将个人资料图片上传到用户个人资料，但个人资料图片未显示在个人资料页面上，没有弹出错误，那么如何重组此代码以解决此问题?

I am trying to upload a profile image to the user profile but the profile image doesn't appear on the profile page there are no errors popping up so how do I restructure this code to fix this issue?

 if let ProfileImageUrl = dictionary?["photo"] as? String {
                     let url = URL(string: ProfileImageUrl)
                    URLSession.shared.dataTask(with: url!, completionHandler: { ( data, response, Error ) in
                        if Error != nil {
                            print(Error!)
                        return
            }
                        DispatchQueue.main.async {
                            self.ProfileImage.image = UIImage(data: data!)
                        }

推荐答案

结尾闭包中的错误"应为错误".这只是命名约定的问题，不一定会导致代码失败.

The "Error" in trailing closure should be "error". It's just a matter of naming convention, doesn't necessarily cause the code to fail.

发现问题，您在数据任务上缺少".resume()".以下代码有效:

Found the problem, you're missing ".resume()" on the data task. The following code works :

if let imageUrl = urlString{
        let url = URL(string: imageUrl)
        URLSession.shared.dataTask(with: url!) { (data, response, error) in
            if let error = error{
                print("Error : \(error)")
                return
            }
            DispatchQueue.main.async {
                self.image.image = UIImage(data: data!)
            }
        }.resume()

    }

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