调用本地相册、相机

1、       判断系统是否支持相机

[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]

2、       创建相册视图控制器对象

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

3、       设置sourceType（资源类型）

imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;//相机

imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//图片库

imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;//保存的图片

4、       设置弹出动画（可选）

imagePickerController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;

5、       设置是否允许编辑图片

imagePickerController.allowsEditing = YES;

6、       设置代理(UIImagePickerControllerDelegate)

imagePickerController.delegate = self;

7、       实现代理方法：获取图片

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

{

     [picker dismissViewControllerAnimated:YES completion:nil];

    //获取图片

     UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

}

//取消点击

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    [self dismissViewControllerAnimated:YES completion:^{}];

}

8、       保存图片到相册

UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);// image：要保存的图片UImage对象，

- (void) image: (UIImage *) image

didFinishSavingWithError: (NSError *) error

   contextInfo: (void *) contextInfo{

//如果error==NULL，则表示图片保存成功

}