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!)
}
回答1:
The "Error" in trailing closure should be "error". It's just a matter of naming convention, doesn't necessarily cause the code to fail.
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()
}
回答2:
Firstly You will need to uploaded by button (browser uploaded ) so just create button and then create button action
@IBAction func doUplodPImg(_ sender: Any) {
let image = UIImagePickerController()
image.delegate = self
image.sourceType = UIImagePickerController.SourceType.photoLibrary
image.allowsEditing = false
self.present(image, animated: true)
{
//After it is complete
}
}
and also add one function
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
{
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
{
profileImg.image = image
}
else
{
//Error message
}
guard let selectedImage = info[.originalImage] as? UIImage else {
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
}
profileImg.image = selectedImage
self.dismiss(animated: true, completion: nil)
}
Now you can successfully uploaded photo in UIimageview. please change your own name profileImg to your UIimageview name
make sure you added UIImagePickerControllerDelegate in your top viewcontroller delegate
and If you want to uploaded in server then just use alamofire method
Alamofire.upload(
multipartFormData: { multipartFormData in
if let _image = self.profileImg.image {
if let imageData = _image.jpegData(compressionQuality: 0.7) {
multipartFormData.append(imageData, withName: "profile_image", fileName: "image.jpg", mimeType: "image/jpg")
}
}
for (key, value) in parameters {
multipartFormData.append(value.data(using: String.Encoding.utf8)!, withName: key)
}
}, to: url, method: .post)
{ (response) in
switch response {
case .success(let upload,_,_):
upload.responseJSON { res in
let response = res.result.value as? NSDictionary
print(response)
}
case .failure(_): break
}
}
change your parameters name im using this profile_image (server side parameter)
Hope it will be helpful. let me know if you find any difficulty.
来源：https://stackoverflow.com/questions/59816638/how-to-upload-a-user-profile-image