iOS以编程方式拍照

我知道这是可能的，在一些应用程序中看到这个（iGotYa是我相信最有名的）。 我知道如何设置拍照的一切，节省一切。 但是，如何以编程的方式来完成呢？ 只需要用户点击一些button（在常规的视图控制器），它会自动拍摄使用前置摄像头的图片并保存（或不，只是得到它作为UIImage）

谢谢！

Answer 1

这很简单，只需使用AVFoundation参考指南：

https://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/04_MediaCapture.html

如果您不希望用户看到预览input，则可以跳过代码的设置预览图层部分。

编辑：要更详细。

1）您使用AVFoundation设置捕捉configuration。

• 将相机input设置为正面，closures闪光灯等。

2）跳过设置video预览图层的部分。

3）只要你想要拍照，你就调用captureStillImageAsynchronouslyFromConnection：completionHandler：方法。

注意：如果你不想听到闪光灯，那么你可能会侵犯一些国家（例如日本）的用户权利。 我知道这样做的一个解决方法是捕获一个video帧（不触发闪光）。

Answer 2

你也可以在没有AVFoundation的情况下做到这一点，在我看来，只有使用UIImagePickerController才能实现它。 有三个条件：

1. 很明显，该设备需要有一个摄像头
2. 您必须隐藏相机控件
3. 然后简单地使用UIImagePickerController中的takePicture方法

下面是一个简单的例子，你通常会在按下button后触发

 - (IBAction)takePhoto:(id)sender { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypeCamera; picker.cameraDevice = UIImagePickerControllerCameraDeviceFront; picker.showsCameraControls = NO; [self presentViewController:picker animated:YES completion:^ { [picker takePicture]; }]; } 

Answer 3

VLBCameraView是一个使用AVFoundation拍照的库。

预览显示在视图中，然后可以以编程方式调用方法VLBCameraView＃takePicture拍摄照片。

来与cocoa豆。

Answer 4

在.h文件中

 @interface ABCViewController : UIViewController @property (strong, nonatomic) IBOutlet UIImageView *imageView; - (IBAction)takePhoto: (UIButton *)sender; - (IBAction)selectPhoto:(UIButton *)sender; @end 

在.m文件中

 @interface ABCViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> - (IBAction)takePhoto:(UIButton *)sender { if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Device has no camera" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil]; [myAlertView show]; } else { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.allowsEditing = YES; picker.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentViewController:picker animated:YES completion:NULL]; } } - (IBAction)selectPhoto:(UIButton *)sender { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.allowsEditing = YES; picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self presentViewController:picker animated:YES completion:NULL]; } - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { UIImage *chosenImage = info[UIImagePickerControllerEditedImage]; self.imageView.image = chosenImage; [picker dismissViewControllerAnimated:YES completion:NULL]; } - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { [picker dismissViewControllerAnimated:YES completion:NULL]; } 

Answer 5

这是Objective-C相机的代码。 你可以根据你的意愿添加function，button。

 #import "CustomCameraVC.h" @interface CustomCameraVC () { BOOL frontCamera; } @property (strong,nonatomic) AVCaptureSession *captureSession; @property (strong,nonatomic) AVCaptureStillImageOutput *stillImageOutput; @property (strong,nonatomic) AVCaptureVideoPreviewLayer *videoPreviewLayer; @property (weak, nonatomic) IBOutlet UIView *viewCamera; @end @implementation CustomCameraVC - (void)viewDidLoad { [super viewDidLoad]; } -(void)viewWillAppear:(BOOL)animated { [super viewWillAppear:YES]; frontCamera = NO; [self showCameraWithFrontCamera:frontCamera]; } -(void)showCameraWithFrontCamera:(BOOL)flag { self.captureSession = [[AVCaptureSession alloc]init]; self.captureSession.sessionPreset = AVCaptureSessionPresetPhoto; AVCaptureDevice *captureDevice; if(flag) { captureDevice= [self frontCamera]; } else { captureDevice= [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; } NSError *error = nil; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error]; [self.captureSession addInput:input]; self.stillImageOutput = [AVCaptureStillImageOutput new]; self.stillImageOutput.outputSettings = @{AVVideoCodecKey:AVVideoCodecJPEG}; [self.captureSession addOutput:_stillImageOutput]; self.videoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession]; self.videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; self.videoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationPortrait; [self.viewCamera.layer addSublayer:self.videoPreviewLayer]; [self.captureSession startRunning]; self.videoPreviewLayer.frame = self.viewCamera.bounds; } - (AVCaptureDevice *)frontCamera { NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]; for (AVCaptureDevice *device in devices) { if ([device position] == AVCaptureDevicePositionFront) { return device; } } return nil; } - (IBAction)btnCaptureImagePressed:(id)sender { AVCaptureConnection * videoConnection = [_stillImageOutput connectionWithMediaType:AVMediaTypeVideo]; [_stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef _Nullable sampleBuffer, NSError * _Nullable error) { NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:sampleBuffer]; UIImage *image = [[UIImage alloc]initWithData: imageData]; UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil); }]; } @end