在没有用户交互的情况下捕获图像

Question

我想在 iOS 中使用前置摄像头在没有任何用户交互的情况下拍摄照片。谁能告诉我如何做到这一点？

我在UIImagePickerController 类中使用了takePicture 函数，但它不起作用，因为委托方法(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 永远不会被调用：

-(void)takePicture:(id)sender
{
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
//Use camera if device has one otherwise use photo library
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
    [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
}
else
{
    [imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
}

[imagePicker setDelegate:self];

//Show image picker
     [imagePicker takePicture];
}

谁能告诉我正确的方法吗？

Answer 1

需要添加以下代码

//Getting image from front camera
imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;

[self imagePicker animated:YES completion:nil];