iPhone中如何判断当前相机是否可用

  UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;  

   if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])   //判断相机是否可用，不可以去相册获取

        sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

点击相册中的图片 货照相机照完后点击use  后触发的方法

 

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

 

    点击cancel 调用的方法

 

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker