iOS将相册中图片上传至服务器的方法

//从相册中选取图片或拍照 - (void)btnActionForEditPortrait:(id) sender {   UIImagePickerController *picker = [[UIImagePickerController alloc] init];   picker.delegate = self;   picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;   picker.allowsEditing = YES;   [self presentViewController:picker animated:YES completion:NULL]; }  - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {      _avatar = info[UIImagePickerControllerOriginalImage];    [self saveImage:_avatar WithName:@"userAvatar"];    //处理完毕，回到个人信息页面   [picker dismissViewControllerAnimated:YES completion:NULL];   [_tableView reloadData]; } 

//保存图片 - (void)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName {   NSData* imageData = UIImagePNGRepresentation(tempImage);   NSString* documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];   NSString* totalPath = [documentPath stringByAppendingPathComponent:imageName];      //保存到 document   [imageData writeToFile:totalPath atomically:NO];      //保存到 NSUserDefaults   NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];   [userDefaults setObject:totalPath forKey:@"avatar"];      //上传服务器   [[HSLoginClass new] uploadAvatar:totalPath]; }  //从document取得图片 - (UIImage *)getImage:(NSString *)urlStr {   return [UIImage imageWithContentsOfFile:urlStr]; }