ios 相机录视频和拍照的封装保存到相册

素颜马尾好姑娘i 2022-06-09 08:44 270阅读 0赞

使用：

@interface ViewController ()
    @property (nonatomic, strong) CameraTool *videoTool;
    @property (strong,nonatomic) AVCaptureVideoPreviewLayer *captureVideoPreviewLayer;//相机拍摄预览图层
    
    @end
    
    @implementation ViewController
    - (CameraTool *)videoTool {
        if(!_videoTool) {
            _videoTool = [[CameraTool alloc]init];
        }
        return _videoTool;
    }
    
    -(void)viewDidLoad {
        [super viewDidLoad];
        
        self.captureVideoPreviewLayer  =  [self.videoTool previewLayer];
        CALayer *layer=self.view.layer;
        layer.masksToBounds=YES;
        self.captureVideoPreviewLayer.frame = layer.bounds;
        [layer addSublayer:self.captureVideoPreviewLayer];
    
        [self.videoTool startRecordFunction];
    }

主要代码：

CameraTool.h

#import <Foundation/Foundation.h>
    #import <AVFoundation/AVFoundation.h>
    
    typedef void(^Block)(NSData *data);//回调照片流
    
    @interface CameraTool : NSObject
    
    @property (strong, nonatomic) NSString *videoPath;//视频路径
    
    //捕获到的视频呈现的layer
    - (AVCaptureVideoPreviewLayer *)previewLayer;
    
    //启动录制功能
    - (void)startRecordFunction;
    
    //关闭录制功能
    - (void)stopRecordFunction;
    
    //开始录制
    - (void) startCapture;
    
    //停止录制
    - (void) stopCapture;
    
    //拍照
    - (void)shutterCamera:(Block)block;
    
    //开启闪光灯
    - (void)openFlashLight;
    
    //关闭闪光灯
    - (void)closeFlashLight;
    
    //切换前后置摄像头
    - (void)changeCameraInputDeviceisFront:(BOOL)isFront;
    
    -(void)saveAllVideoToPoto;//保存视频到相册
    
    -(void)deleteAllVideo;//删除所有视频
    
    @end

CameraTool.m

#import "CameraTool.h"
    #import <AssetsLibrary/AssetsLibrary.h>
    #import <Photos/Photos.h>
    
    @interface CameraTool() <AVCaptureFileOutputRecordingDelegate>
    
    @property (strong, nonatomic) AVCaptureSession *captureSession;  //负责输入和输出设备之间的连接会话,数据流的管理控制
    @property (strong, nonatomic) AVCaptureVideoPreviewLayer *previewLayer;//捕获到的视频呈现的layer
    @property (strong, nonatomic) AVCaptureDeviceInput       *backCameraInput;//后置摄像头输入
    @property (strong, nonatomic) AVCaptureDeviceInput       *frontCameraInput;//前置摄像头输入
    @property (strong, nonatomic) AVCaptureDeviceInput       *audioMicInput;//麦克风输入
    @property (strong, nonatomic) AVCaptureConnection        *videoConnection;//视频录制连接
    @property (strong,nonatomic) AVCaptureMovieFileOutput    *captureMovieFileOutput;//视频输出流
    
    @property (nonatomic, strong)AVCaptureStillImageOutput *stillImageOutput;//照片输出流对象
    
    @end
    
    @implementation CameraTool
    
    
    #pragma mark -API
    
    //启动录制功能
    - (void)startRecordFunction
    {
       [self.captureSession startRunning];
    }
    
    //关闭录制功能
    - (void)stopRecordFunction
    {
        if(self.captureSession)
            [self.captureSession stopRunning];
    }
    
    //开始录制
    - (void)startCapture
    {
        if(self.captureMovieFileOutput.isRecording)
            return;
        NSString *defultPath = [self getVideoPathCache];
        NSString *outputFielPath=[defultPath stringByAppendingPathComponent:[self getVideoNameWithType:@"mp4"]];
        NSLog(@"save path is :%@",outputFielPath);
        NSURL *fileUrl=[NSURL fileURLWithPath:outputFielPath];
        //设置录制视频流输出的路径
        [self.captureMovieFileOutput startRecordingToOutputFileURL:fileUrl recordingDelegate:self];
       
    }
    
    //停止录制
    - (void) stopCapture
    {
        if ([self.captureMovieFileOutput isRecording]) {
            [self.captureMovieFileOutput stopRecording];//停止录制
        }
    }
    
    // 这是拍照按钮的方法
    - (void)shutterCamera:(Block)block
    {
        AVCaptureConnection *videoConnection = [self.stillImageOutput connectionWithMediaType:AVMediaTypeVideo];
        if (!videoConnection) {
            NSLog(@"空");
            return;
        }
        
        [self.stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
            if (imageDataSampleBuffer == NULL) {
                return;
            }
            NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
            block(imageData);
            UIImage *image = [UIImage imageWithData:imageData];
            [self SavedPhoto:image];
            NSLog(@"image size = %@", NSStringFromCGSize(image.size));
        }];
    }
    
    //保存图片到相册
    - (void)SavedPhoto:(UIImage *)image
    {
        UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), (__bridge void *)self);
    }
    
    - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
    {
        
        NSLog(@"image = %@, error = %@, contextInfo = %@", image, error, contextInfo);
    }
    
    //开启闪光灯
    - (void)openFlashLight
    {
        //改变会话的配置前一定要先开启配置，配置完成后提交配置改变
        //[self stopRecordFunction];
        [self.captureSession beginConfiguration];
        AVCaptureDevice *backCamera = [self backCamera];
        if (backCamera.torchMode == AVCaptureTorchModeOff) {
            [backCamera lockForConfiguration:nil];
            backCamera.torchMode = AVCaptureTorchModeOn;
            backCamera.flashMode = AVCaptureFlashModeOn;
            [backCamera unlockForConfiguration];
        }
        //提交会话配置
        [self.captureSession commitConfiguration];
        [self startRecordFunction];
    }
    
    //关闭闪光灯
    - (void)closeFlashLight
    {
        //改变会话的配置前一定要先开启配置，配置完成后提交配置改变
       // [self stopRecordFunction];
        [self.captureSession beginConfiguration];
        AVCaptureDevice *backCamera = [self backCamera];
        if (backCamera.torchMode == AVCaptureTorchModeOn) {
            [backCamera lockForConfiguration:nil];
            backCamera.torchMode = AVCaptureTorchModeOff;
            backCamera.flashMode = AVCaptureTorchModeOff;
            [backCamera unlockForConfiguration];
        }
        //提交会话配置
        [self.captureSession commitConfiguration];
        [self startRecordFunction];
    
    }
    
    //切换前后置摄像头
    - (void)changeCameraInputDeviceisFront:(BOOL)isFront {
        //改变会话的配置前一定要先开启配置，配置完成后提交配置改变
        [self stopRecordFunction];
        [self.captureSession beginConfiguration];
        if (isFront) {
            
            [self.captureSession removeInput:self.backCameraInput];
            if ([self.captureSession canAddInput:self.frontCameraInput]) {
                //[self changeCameraAnimation];
                [self.captureSession addInput:self.frontCameraInput];
            }
        }else {
            [self.captureSession removeInput:self.frontCameraInput];
            if ([self.captureSession canAddInput:self.backCameraInput]) {
                //[self changeCameraAnimation];
                [self.captureSession addInput:self.backCameraInput];
            }
        }
        //提交会话配置
        [self.captureSession commitConfiguration];
        [self startRecordFunction];
    }
    
    #pragma mark - 视频输出代理
    -(void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections{
        NSLog(@"开始录制...");
    }
    
    -(void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{
        NSLog(@"视频录制完成.");
        
        [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];
        
        [self startCapture];
        
        //视频录入完成之后在后台将视频存储到相
    //    [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
    //        [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:outputFileURL];
    //    } completionHandler:^(BOOL success, NSError * _Nullable error) {
    //        if (error) {
    //            NSLog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizedDescription);
    //        }else {
    //            NSLog(@"成功保存视频到相簿.");
    //        }
    //    }];
        
    }
    
    -(void)saveAllVideoToPoto {
        NSArray *arr = [self getAllFile];
        for (NSString *str in arr) {
            NSURL *fileUrl=[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/%@",[self getVideoPathCache],str]];
            [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
                [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:fileUrl];
            } completionHandler:^(BOOL success, NSError * _Nullable error) {
                if (error) {
                    NSLog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizedDescription);
                }else {
                    NSLog(@"成功保存视频到相簿.");
                }
            }];
        }
    }
    
    -(void)deleteAllVideo {
        NSArray *arr = [self getAllFile];
        for (NSString *str in arr) {
            NSString *file = [NSString stringWithFormat:@"%@/%@",[self getVideoPathCache],str];
            NSFileManager *fileManager = [NSFileManager defaultManager];
           BOOL is = [fileManager removeItemAtPath:file error:nil];
            if (!is) {
                NSLog(@"删除文件错误");
            }
        }
        
    }
    
    #pragma mark - 视频地址
    - (NSString *)getVideoPathCache
    {
        NSString *videoCache = [NSTemporaryDirectory() stringByAppendingPathComponent:@"videos"] ;
        BOOL isDir = NO;
        NSFileManager *fileManager = [NSFileManager defaultManager];
        BOOL existed = [fileManager fileExistsAtPath:videoCache isDirectory:&isDir];
        if ( !(isDir == YES && existed == YES) ) {
            [fileManager createDirectoryAtPath:videoCache withIntermediateDirectories:YES attributes:nil error:nil];
        };
        return videoCache;
    }
    
    - (NSString *)getVideoNameWithType:(NSString *)fileType {
        
        NSTimeInterval now = [[NSDate date] timeIntervalSince1970];
        NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
        [formatter setDateFormat:@"HHmmss"];
        NSDate * NowDate = [NSDate dateWithTimeIntervalSince1970:now];
        ;
        NSString * timeStr = [formatter stringFromDate:NowDate];
        NSString *fileName = [NSString stringWithFormat:@"video_%@.%@",timeStr,fileType];
        return fileName;
    }
    
    -(NSArray *)getAllFile {
        NSArray *files = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:[self getVideoPathCache] error:nil];
        return files;
    }
    
    #pragma mark - Device init Method
    //捕获到的视频呈现的layer
    - (AVCaptureVideoPreviewLayer *)previewLayer {
        if (_previewLayer == nil) {
            //通过AVCaptureSession初始化
            AVCaptureVideoPreviewLayer *preview = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession];
            //设置比例为铺满全屏
            preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
            _previewLayer = preview;
        }
        return _previewLayer;
    }
    
    //捕获视频的会话
    - (AVCaptureSession *)captureSession
    {
        if(_captureSession == nil)
        {
            _captureSession = [[AVCaptureSession alloc] init];
            
            //设置分辨率
            if ([_captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720]) {
                _captureSession.sessionPreset=AVCaptureSessionPreset1280x720;
            }
            
            //添加后置摄像头的输入
            if ([_captureSession canAddInput:self.backCameraInput]) {
                [_captureSession addInput:self.backCameraInput];
            }
            
            //添加后置麦克风的输入
            if ([_captureSession canAddInput:self.audioMicInput]) {
                [_captureSession addInput:self.audioMicInput];
            }
            
            //将设备输出添加到会话中
            if ([_captureSession canAddOutput:self.captureMovieFileOutput]) {
                [_captureSession addOutput:self.captureMovieFileOutput];
            }
            
            //照片输出流
            if ([_captureSession canAddOutput:self.stillImageOutput]) {
                [_captureSession addOutput:self.stillImageOutput];
            }
            
            //设置视频录制的方向
            self.videoConnection.videoOrientation = AVCaptureVideoOrientationPortrait;
        }
        return _captureSession;
    }
    
    
    //后置摄像头输入
    - (AVCaptureDeviceInput *)backCameraInput {
        if (_backCameraInput == nil) {
            NSError *error;
            _backCameraInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backCamera] error:&error];
            if (error) {
                NSLog(@"获取后置摄像头失败~%d",[self isAvailableWithCamera]);
            }
        }
        return _backCameraInput;
    }
    
    //前置摄像头输入
    - (AVCaptureDeviceInput *)frontCameraInput {
        if (_frontCameraInput == nil) {
            NSError *error;
            _frontCameraInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self frontCamera] error:&error];
            if (error) {
                NSLog(@"获取前置摄像头失败~");
            }
        }
        return _frontCameraInput;
    }
    
    //麦克风输入
    - (AVCaptureDeviceInput *)audioMicInput {
        if (_audioMicInput == nil) {
            AVCaptureDevice *mic = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
            NSError *error;
            _audioMicInput = [AVCaptureDeviceInput deviceInputWithDevice:mic error:&error];
            if (error) {
                
                NSLog(@"获取麦克风失败~%d",[self isAvailableWithMic]);
            }
        }
        return _audioMicInput;
    }
    
    //照片输出流
    -(AVCaptureStillImageOutput *)stillImageOutput {
        if (!_stillImageOutput) {
            _stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
            // 这是输出流的设置参数AVVideoCodecJPEG参数表示以JPEG的图片格式输出图片
            NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG, AVVideoCodecKey, nil];
            [_stillImageOutput setOutputSettings:outputSettings];
        }
        return _stillImageOutput;
    }
    
    //初始化设备输出对象，用于获得输出数据
    - (AVCaptureMovieFileOutput *)captureMovieFileOutput
    {
      if(_captureMovieFileOutput == nil)
      {
          _captureMovieFileOutput = [[AVCaptureMovieFileOutput alloc]init];
      }
        return _captureMovieFileOutput;
    }
    
    //视频连接
    - (AVCaptureConnection *)videoConnection {
        _videoConnection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo];
        if ([_videoConnection isVideoStabilizationSupported ]) {
            _videoConnection.preferredVideoStabilizationMode=AVCaptureVideoStabilizationModeAuto;
        }
        return _videoConnection;
    }
    
    
    //返回前置摄像头
    - (AVCaptureDevice *)frontCamera {
        return [self cameraWithPosition:AVCaptureDevicePositionFront];
    }
    
    //返回后置摄像头
    - (AVCaptureDevice *)backCamera {
        return [self cameraWithPosition:AVCaptureDevicePositionBack];
    }
    
    
    
    
    //用来返回是前置摄像头还是后置摄像头
    - (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition) position {
        //返回和视频录制相关的所有默认设备
        NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
        //遍历这些设备返回跟position相关的设备
        for (AVCaptureDevice *device in devices) {
            if ([device position] == position) {
                return device;
            }
        }
        return nil;
    }
    
    @end
    
    @implementation CameraTool(Authorization)
    
    - (BOOL)isAvailableWithCamera
    {
        return [self isAvailableWithDeviveMediaType:AVMediaTypeVideo];
    }
    
    - (BOOL)isAvailableWithMic
    {
        return [self isAvailableWithDeviveMediaType:AVMediaTypeAudio];
    }
    
    - (BOOL)isAvailableWithDeviveMediaType:(NSString *)mediaType
    {
        AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
        if(status == ALAuthorizationStatusDenied||status == ALAuthorizationStatusRestricted)
            return NO;
        else
            return YES;
    }
    
    @end

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