//從相冊中選取圖片或拍照 
- (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"]; 
 
  //處理完畢，回到個人信息頁面 
  [picker dismissViewControllerAnimated:YES completion:NULL]; 
  [_tableView reloadData]; 
} 

//保存圖片 
- (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"]; 
   
  //上傳服務器 
  [[HSLoginClass new] uploadAvatar:totalPath]; 
} 
 
//從document取得圖片 
- (UIImage *)getImage:(NSString *)urlStr 
{ 
  return [UIImage imageWithContentsOfFile:urlStr]; 
}