Question

我想在iOS开发中同时使用前置和后置摄像头：当我使用后置摄像头拍摄一张照片时，之后可以打开前置摄像头并拍摄另一张照片。顺便说一下，这两个照片在一张照片中：垂直排列。

以前是否有人这样做过？

Answer 1

使用UIImagePickerController拍摄照片，并使用cameraDevice property确定正在使用的相机。

为了合并图像，我通过搜索找到了一个例子（将来推荐它）merges multiple images into one image

Answer 2

超级简单，这是一种简单的方法。只需用你的图像替换我的imagNamed，选择器就是创建的新方法。这通过删除showsCameraControls = NO;

用于自定义相机

@interface yourClassName () {
   UIImagePickerController *picker; //this calls the video/photo screen
   UIButton *cameraFront, *cameraBack //front and back buttons
}

//in your UIImagePickerController
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
picker.showsCameraControls = NO;

[cameraFront setBackgroundImage:[UIImage imageNamed:@"camera_switch_logo"] forState:UIControlStateNormal];
UITapGestureRecognizer *camerafront = [[UITapGestureRecognizer alloc]
                                           initWithTarget:self action:@selector(deviceModeFront:)];
[cameraFront addGestureRecognizer:camerafront];

[cameraBack setBackgroundImage:[UIImage imageNamed:@"camera_switch_logo2"] forState:UIControlStateNormal];
UITapGestureRecognizer *cameraback = [[UITapGestureRecognizer alloc]
                                          initWithTarget:self action:@selector(deviceModeBack:)];
[cameraBack addGestureRecognizer:cameraback];
cameraBack.hidden = true;

//These are the new methods created as the selector for when image is pressed
- (IBAction)deviceModeFront:(id)sender {
    [picker setCameraDevice:UIImagePickerControllerCameraDeviceFront];
    cameraFront.hidden = true;
    cameraBack.hidden = false;
}

- (IBAction)deviceModeBack:(id)sender {
    [picker setCameraDevice:UIImagePickerControllerCameraDeviceRear];
    cameraFront.hidden = false;
    cameraBack.hidden = true;
}

如何在iOS开发中同时打开前/后摄像头？

2 个答案: