其實(shí)這相當(dāng)于是一個(gè)自定義相機(jī)的功能了

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github下載鏈接：https://github.com/SSYSSK/camera2

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1、自定義相機(jī)

2、視頻的捕獲預(yù)覽

3、視頻的錄制

4、拍照

5、解決了拍照照片翻轉(zhuǎn)90度的問(wèn)題

6、解決了前置攝像頭照片顛倒的問(wèn)題

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關(guān)鍵點(diǎn)：

1、自從iOS10之后，獲取圖片的輸出由AVCaptureStillImageOutput變成了AVCapturePhotoOutput，所以需要做兩套適配，輸出配置代碼：

//6、靜態(tài)圖片輸出if (@available(iOS 10.0, *)) {self.imageOutput = [[AVCapturePhotoOutput alloc]init];//輸出連接 判斷是否可用，可用則添加到輸出連接中去if ([self.captureSession canAddOutput:self.imageOutput]){[self.captureSession addOutput:self.imageOutput];}}else {//AVCaptureStillImageOutput 實(shí)例 從攝像頭捕捉靜態(tài)圖片self.stillImageOutput = [[AVCaptureStillImageOutput alloc]init];//配置字典：希望捕捉到JPEG格式的圖片self.stillImageOutput.outputSettings = @{AVVideoCodecKey:AVVideoCodecTypeJPEG};if ([self.captureSession canAddOutput:self.stillImageOutput]){[self.captureSession addOutput:self.stillImageOutput];}}

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2、拍照功能，要區(qū)分iOS10和iOS10之前：

?[output capturePhotoWithSettings:settings delegate:self];

// 從流中獲取照片 -(void)getPhoto {// 拍照if (@available(iOS 10.0, *)) {AVCapturePhotoOutput * output = (AVCapturePhotoOutput *)self.imageOutput;AVCapturePhotoSettings * settings = [AVCapturePhotoSettings photoSettings];// 這一句代碼才是執(zhí)行拍照[output capturePhotoWithSettings:settings delegate:self];}else{AVCaptureStillImageOutput * stillImageOutput = (AVCaptureStillImageOutput *)self.stillImageOutput;//從 AVCaptureStillImageOutput 中取得 AVCaptureConnectionAVCaptureConnection *connection = [stillImageOutput connectionWithMediaType:AVMediaTypeVideo];[stillImageOutput captureStillImageAsynchronouslyFromConnection:connection completionHandler:^(CMSampleBufferRef _Nullable imageDataSampleBuffer, NSError * _Nullable error) {if (imageDataSampleBuffer != nil) {NSData * data = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];UIImage *image = [[UIImage alloc]initWithData:data];//重點(diǎn)：捕捉圖片成功后，將圖片傳遞出去UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);}}];}}

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3、拍照完成的代理回調(diào)（iOS10之后才會(huì)走這里），這里要注意一個(gè)照片翻轉(zhuǎn)的問(wèn)題：

? ? ? ? ? ? //前置攝像頭拍照會(huì)旋轉(zhuǎn)180解決辦法
? ? ? ? ? ? if (self.activeVideoInput.device.position == AVCaptureDevicePositionFront) {
? ? ? ? ? ? ? ? UIImageOrientation imgOrientation = UIImageOrientationLeftMirrored;
? ? ? ? ? ? ? ? image = [[UIImage alloc]initWithCGImage:cgImage scale:1.0f orientation:imgOrientation];
? ? ? ? ? ? }else {
? ? ? ? ? ? ? ? UIImageOrientation imgOrientation = UIImageOrientationRight;
? ? ? ? ? ? ? ? image = [[UIImage alloc]initWithCGImage:cgImage scale:1.0f orientation:imgOrientation];
? ? ? ? ? ? }

#pragma mark AVCapturePhotoCaptureDelegate - (void)captureOutput:(AVCapturePhotoOutput *)output didFinishProcessingPhoto:(AVCapturePhoto *)photo error:(NSError *)error {if (error) {NSLog(@"獲取圖片錯(cuò)誤 --- %@",error.localizedDescription);}if (photo) {if (@available(iOS 11.0, *)) {CGImageRef cgImage = [photo CGImageRepresentation];UIImage * image = [UIImage imageWithCGImage:cgImage];NSLog(@"獲取圖片成功 --- %@",image);//前置攝像頭拍照會(huì)旋轉(zhuǎn)180解決辦法if (self.activeVideoInput.device.position == AVCaptureDevicePositionFront) {UIImageOrientation imgOrientation = UIImageOrientationLeftMirrored;image = [[UIImage alloc]initWithCGImage:cgImage scale:1.0f orientation:imgOrientation];}else {UIImageOrientation imgOrientation = UIImageOrientationRight;image = [[UIImage alloc]initWithCGImage:cgImage scale:1.0f orientation:imgOrientation];}//重新畫(huà)一張圖片(將時(shí)間/個(gè)人信息/地址信息畫(huà)上去) // self.image = [self drawMarkImage:image];UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);} else {NSLog(@"不是走這個(gè)代理方法");}} }

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