通过 php 将图像从 UIImagePicker 上传到服务器

Question

我有一个 UIImageView 加载用户的个人资料图片。我添加了一些 UIImagePicker 功能，现在用户可以通过使用相机或从库中添加来更改个人资料图片。这是代码：

- (IBAction)cameraAction:(id)sender {
   UIImagePickerController *picker = [[UIImagePickerController alloc] init];
   picker.delegate = self;
   picker.allowsEditing = YES;
   picker.sourceType = UIImagePickerControllerSourceTypeCamera;

   [self presentViewController:picker animated:YES completion:NULL];
}

- (IBAction)libraryAction:(id)sender {
   UIImagePickerController *picker = [[UIImagePickerController alloc] init];
   picker.delegate = self;
   picker.allowsEditing = YES;
   picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

   [self presentViewController:picker animated:YES completion:NULL];
}

#pragma mark - Image Picker Controller delegate methods

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

   UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
   _profilePhoto.image = chosenImage;
   UIImageWriteToSavedPhotosAlbum(_profilePhoto.image, nil, nil, nil);

   [picker dismissViewControllerAnimated:YES completion:NULL];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

   [picker dismissViewControllerAnimated:YES completion:NULL];

}

现在，我有 php 文件将当前图像上传到服务器。问题是，php 的输入参数是图像文件名。我确实环顾了很多次，知道要获取图像名称，首先我需要将其保存到应用程序文档目录，然后用我想要的名称重命名它。所以谁能告诉我如何将这张图片保存到应用程序文档目录，如何获取它以及如何用我想要的那个重命名它。提前致谢

Answer 1

不要认为将文件保存到文档目录会为您生成新名称。 当我将某些内容保存到文档时，我会生成唯一的文件名。

我所做的是向网络服务器传递一些通用名称，例如“Upload.png”。

这是一些伪代码：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
   UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
   [picker dismissViewControllerAnimated:YES completion:NULL];


   ...
   NSData *data = UIImagePNGRepresentation(choosenImage);
   NSString *name = @"Uploaded.png"

   // Upload the nsdata to server
   [[PHPServer instance] uploadProfileImage:data named:name];
}