Question

我正在尝试接受iOS开发，所以我还是一个菜鸟。我设法复制并粘贴了相机控制器（从here复制）并使其正常工作。

然而，我正在尝试创建一个间谍相机应用程序，所以我不希望屏幕看起来像一个相机。我想用黑色覆盖它。我尝试将亮度设置为0，但这只会使一切变暗。由于摄像机视图位于前景，因此将背景设置为黑色也不起作用。有没有办法实例化相机控制器并使相机硬件处于活动状态，并以某种方式编辑随之而来的视图，以便它不显示？

#import "EMCameraController.h"

@interface EMCameraController ()
@property (strong, nonatomic) IBOutlet UIImageView *camera;

@end

@implementation EMCameraController

@synthesize camera=_camera;
- (IBAction)showCamera:(id)sender {
    [self startCameraControllerFromViewController: self

                                    usingDelegate: self];

    NSLog(@"done!");
}



- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller

                                   usingDelegate: (id <UIImagePickerControllerDelegate,

                                                   UINavigationControllerDelegate>) delegate {



    if (([UIImagePickerController isSourceTypeAvailable:

          UIImagePickerControllerSourceTypeCamera] == NO)

        || (delegate == nil)

        || (controller == nil))

        return NO;





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

    cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;



    // Displays a control that allows the user to choose picture or

    // movie capture, if both are available:

    cameraUI.mediaTypes =

    [UIImagePickerController availableMediaTypesForSourceType:

     UIImagePickerControllerSourceTypeCamera];



    // Hides the controls for moving & scaling pictures, or for

    // trimming movies. To instead show the controls, use YES.

    cameraUI.allowsEditing = NO;



    cameraUI.delegate = delegate;



    [controller presentModalViewController: cameraUI animated: NO];

    cameraUI.view.backgroundColor = [UIColor blackColor]; //<-- doesn't work since camera view is in foreground
    [[UIScreen mainScreen] setBrightness:0.0];  //<-- not working the way I want it.

    return YES;

}


@end

Answer 1

您应该使用AVCapture*方法。它允许直接从相机拍摄图像。例如，请查看此示例https://developer.apple.com/library/ios/samplecode/SquareCam/Introduction/Intro.html#//apple_ref/doc/uid/DTS40011190-Intro-DontLinkElementID_2

iOS：如何使用相机拍照，而不显示相机屏幕？

1 个答案: