UIImagePickerController快门检测

Question

有没有办法检测相机何时拍完照片？

目前我正在使用以下方法：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissViewControllerAnimated:YES completion:nil];
    NSLog(@"END");
    _showAlert = NO;
    _alertIsShowing = NO;
    if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) {
        UIImageWriteToSavedPhotosAlbum([info objectForKey:@"UIImagePickerControllerOriginalImage"], nil, nil, nil);
        _endAlerts = YES;
    }
    _imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    _saveBtn.hidden = NO;
}

用户点击“使用照片”按钮后触发。我希望在图像选择器视图中捕获图像后立即触发。

Answer 1

这样做的唯一方法就是创建我自己的叠加层，这本身就证明是后端的痛苦。