弹出UIImagePickerController（照片选择器）

• 如何进入系统的相册UIImagePickerController？

  • 1.创建一个照片选择控制器
    UIImagePickerController *imagePickerVc = [[UIImagePickerController alloc] init];
  • 2.设置数据源（弹出的是否直接是照片库）
    imagePickerVc.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
  • 3.设置代理（UIImagePickerControllerDelegate）
    imagePickerVc.delegate = self;
  • 4.把图片库Modal出来
    [self presentViewController:imagePickerVc animated:YES completion:nil];

• 如何监听并处理弹出来照片库的点击事件？

  • 1.遵守代理协议
    @interface ViewController ()< UIImagePickerControllerDelegate>
  • 2.设置代理为self
    imagePickerVc.delegate = self;
  • 3.实现代理方法

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    // 获取用户选择照片
    UIImage *image = info[UIImagePickerControllerOriginalImage];

    //把Modal出来的imagePickerController弹出
    [self dismissViewControllerAnimated:YES completion:nil];

    // 在此处理图片
}