iOS仿微信相机拍照、视频录制功能

#import <AVFoundation/AVFoundation.h> #import <AssetsLibrary/AssetsLibrary.h>

Privacy - Microphone Usage Description Privacy - Photo Library Usage Description Privacy - Camera Usage Description

#import "HAVPlayer.h"#import <AVFoundation/AVFoundation.h>@interface HAVPlayer ()@property (nonatomic,strong) AVPlayer *player;//播放器对象@end@implementation HAVPlayer/*// Only override drawRect: if you perform custom drawing.// An empty implementation adversely affects performance during animation.- (void)drawRect:(CGRect)rect { // Drawing code}*/- (instancetype)initWithFrame:(CGRect)frame withShowInView:(UIView *)bgView url:(NSURL *)url { if (self = [self initWithFrame:frame]) {  //创建播放器层  AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];  playerLayer.frame = self.bounds;  [self.layer addSublayer:playerLayer];  if (url) {   self.videoUrl = url;  }  [bgView addSubview:self]; } return self;}- (void)dealloc { [self removeAvPlayerNtf]; [self stopPlayer]; self.player = nil;}- (AVPlayer *)player { if (!_player) {  _player = [AVPlayer playerWithPlayerItem:[self getAVPlayerItem]];  [self addAVPlayerNtf:_player.currentItem]; } return _player;}- (AVPlayerItem *)getAVPlayerItem { AVPlayerItem *playerItem=[AVPlayerItem playerItemWithURL:self.videoUrl]; return playerItem;}- (void)setVideoUrl:(NSURL *)videoUrl { _videoUrl = videoUrl; [self removeAvPlayerNtf]; [self nextPlayer];}- (void)nextPlayer { [self.player seekToTime:CMTimeMakeWithSeconds(0, _player.currentItem.duration.timescale)]; [self.player replaceCurrentItemWithPlayerItem:[self getAVPlayerItem]]; [self addAVPlayerNtf:self.player.currentItem]; if (self.player.rate == 0) {  [self.player play]; }}- (void) addAVPlayerNtf:(AVPlayerItem *)playerItem { //监控状态属性 [playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil]; //监控网络加载情况属性 [playerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackFinished:) name:AVPlayerItemDidPlayToEndTimeNotification object:self.player.currentItem];}- (void)removeAvPlayerNtf { AVPlayerItem *playerItem = self.player.currentItem; [playerItem removeObserver:self forKeyPath:@"status"]; [playerItem removeObserver:self forKeyPath:@"loadedTimeRanges"]; [[NSNotificationCenter defaultCenter] removeObserver:self];}- (void)stopPlayer { if (self.player.rate == 1) {  [self.player pause];//如果在播放状态就停止 }}/** * 通过KVO监控播放器状态 * * @param keyPath 监控属性 * @param object 监视器 * @param change 状态改变 * @param context 上下文 */-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{ AVPlayerItem *playerItem = object; if ([keyPath isEqualToString:@"status"]) {  AVPlayerStatus status= [[change objectForKey:@"new"] intValue];  if(status==AVPlayerStatusReadyToPlay){   NSLog(@"正在播放...，视频总长度:%.2f",CMTimeGetSeconds(playerItem.duration));  } }else if([keyPath isEqualToString:@"loadedTimeRanges"]){  NSArray *array=playerItem.loadedTimeRanges;  CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];//本次缓冲时间范围  float startSeconds = CMTimeGetSeconds(timeRange.start);  float durationSeconds = CMTimeGetSeconds(timeRange.duration);  NSTimeInterval totalBuffer = startSeconds + durationSeconds;//缓冲总长度  NSLog(@"共缓冲：%.2f",totalBuffer); }}- (void)playbackFinished:(NSNotification *)ntf { Plog(@"视频播放完成"); [self.player seekToTime:CMTimeMake(0, 1)]; [self.player play];}@end

#import "HProgressView.h"@interface HProgressView ()/** * 进度值0-1.0之间 */@property (nonatomic,assign)CGFloat progressValue;@property (nonatomic, assign) CGFloat currentTime;@end@implementation HProgressView// Only override drawRect: if you perform custom drawing.// An empty implementation adversely affects performance during animation.- (void)drawRect:(CGRect)rect { // Drawing code CGContextRef ctx = UIGraphicsGetCurrentContext();//获取上下文 Plog(@"width = %f",self.frame.size.width); CGPoint center = CGPointMake(self.frame.size.width/2.0, self.frame.size.width/2.0); //设置圆心位置 CGFloat radius = self.frame.size.width/2.0-5; //设置半径 CGFloat startA = - M_PI_2; //圆起点位置 CGFloat endA = -M_PI_2 + M_PI * 2 * _progressValue; //圆终点位置 UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES]; CGContextSetLineWidth(ctx, 10); //设置线条宽度 [[UIColor whiteColor] setStroke]; //设置描边颜色 CGContextAddPath(ctx, path.CGPath); //把路径添加到上下文 CGContextStrokePath(ctx); //渲染}- (void)setTimeMax:(NSInteger)timeMax { _timeMax = timeMax; self.currentTime = 0; self.progressValue = 0; [self setNeedsDisplay]; self.hidden = NO; [self performSelector:@selector(startProgress) withObject:nil afterDelay:0.1];}- (void)clearProgress { _currentTime = _timeMax; self.hidden = YES;}- (void)startProgress { _currentTime += 0.1; if (_timeMax > _currentTime) {  _progressValue = _currentTime/_timeMax;  Plog(@"progress = %f",_progressValue);  [self setNeedsDisplay];  [self performSelector:@selector(startProgress) withObject:nil afterDelay:0.1]; } if (_timeMax <= _currentTime) {  [self clearProgress]; }}@end

#import "HVideoViewController.h"#import <AVFoundation/AVFoundation.h>#import "HAVPlayer.h"#import "HProgressView.h"#import <Foundation/Foundation.h>#import <AssetsLibrary/AssetsLibrary.h>typedef void(^PropertyChangeBlock)(AVCaptureDevice *captureDevice);@interface HVideoViewController ()<AVCaptureFileOutputRecordingDelegate>//轻触拍照，按住摄像@property (strong, nonatomic) IBOutlet UILabel *labelTipTitle;//视频输出流@property (strong,nonatomic) AVCaptureMovieFileOutput *captureMovieFileOutput;//图片输出流//@property (strong,nonatomic) AVCaptureStillImageOutput *captureStillImageOutput;//照片输出流//负责从AVCaptureDevice获得输入数据@property (strong,nonatomic) AVCaptureDeviceInput *captureDeviceInput;//后台任务标识@property (assign,nonatomic) UIBackgroundTaskIdentifier backgroundTaskIdentifier;@property (assign,nonatomic) UIBackgroundTaskIdentifier lastBackgroundTaskIdentifier;@property (weak, nonatomic) IBOutlet UIImageView *focusCursor; //聚焦光标//负责输入和输出设备之间的数据传递@property(nonatomic)AVCaptureSession *session;//图像预览层，实时显示捕获的图像@property(nonatomic)AVCaptureVideoPreviewLayer *previewLayer;@property (strong, nonatomic) IBOutlet UIButton *btnBack;//重新录制@property (strong, nonatomic) IBOutlet UIButton *btnAfresh;//确定@property (strong, nonatomic) IBOutlet UIButton *btnEnsure;//摄像头切换@property (strong, nonatomic) IBOutlet UIButton *btnCamera;@property (strong, nonatomic) IBOutlet UIImageView *bgView;//记录录制的时间 默认最大60秒@property (assign, nonatomic) NSInteger seconds;//记录需要保存视频的路径@property (strong, nonatomic) NSURL *saveVideoUrl;//是否在对焦@property (assign, nonatomic) BOOL isFocus;@property (strong, nonatomic) IBOutlet NSLayoutConstraint *afreshCenterX;@property (strong, nonatomic) IBOutlet NSLayoutConstraint *ensureCenterX;@property (strong, nonatomic) IBOutlet NSLayoutConstraint *backCenterX;//视频播放@property (strong, nonatomic) HAVPlayer *player;@property (strong, nonatomic) IBOutlet HProgressView *progressView;//是否是摄像 YES 代表是录制 NO 表示拍照@property (assign, nonatomic) BOOL isVideo;@property (strong, nonatomic) UIImage *takeImage;@property (strong, nonatomic) UIImageView *takeImageView;@property (strong, nonatomic) IBOutlet UIImageView *imgRecord;@end//时间大于这个就是视频，否则为拍照#define TimeMax 1@implementation HVideoViewController-(void)dealloc{ [self removeNotification];}- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. UIImage *image = [UIImage imageNamed:@"sc_btn_take.png"]; self.backCenterX.constant = -(SCREEN_WIDTH/2/2)-image.size.width/2/2; self.progressView.layer.cornerRadius = self.progressView.frame.size.width/2; if (self.HSeconds == 0) {  self.HSeconds = 60; } [self performSelector:@selector(hiddenTipsLabel) withObject:nil afterDelay:4];}- (void)hiddenTipsLabel { self.labelTipTitle.hidden = YES;}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; [[UIApplication sharedApplication] setStatusBarHidden:YES]; [self customCamera]; [self.session startRunning];}-(void)viewDidAppear:(BOOL)animated{ [super viewDidAppear:animated];}-(void)viewDidDisappear:(BOOL)animated{ [super viewDidDisappear:animated]; [self.session stopRunning];}- (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; [[UIApplication sharedApplication] setStatusBarHidden:NO];}- (void)customCamera { //初始化会话，用来结合输入输出 self.session = [[AVCaptureSession alloc] init]; //设置分辨率 (设备支持的最高分辨率) if ([self.session canSetSessionPreset:AVCaptureSessionPresetHigh]) {  self.session.sessionPreset = AVCaptureSessionPresetHigh; } //取得后置摄像头 AVCaptureDevice *captureDevice = [self getCameraDeviceWithPosition:AVCaptureDevicePositionBack]; //添加一个音频输入设备 AVCaptureDevice *audioCaptureDevice=[[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject]; //初始化输入设备 NSError *error = nil; self.captureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:captureDevice error:&error]; if (error) {  Plog(@"取得设备输入对象时出错，错误原因：%@",error.localizedDescription);  return; } //添加音频 error = nil; AVCaptureDeviceInput *audioCaptureDeviceInput=[[AVCaptureDeviceInput alloc]initWithDevice:audioCaptureDevice error:&error]; if (error) {  NSLog(@"取得设备输入对象时出错，错误原因：%@",error.localizedDescription);  return; } //输出对象 self.captureMovieFileOutput = [[AVCaptureMovieFileOutput alloc] init];//视频输出 //将输入设备添加到会话 if ([self.session canAddInput:self.captureDeviceInput]) {  [self.session addInput:self.captureDeviceInput];  [self.session addInput:audioCaptureDeviceInput];  //设置视频防抖  AVCaptureConnection *connection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo];  if ([connection isVideoStabilizationSupported]) {   connection.preferredVideoStabilizationMode = AVCaptureVideoStabilizationModeCinematic;  } } //将输出设备添加到会话 (刚开始 是照片为输出对象) if ([self.session canAddOutput:self.captureMovieFileOutput]) {  [self.session addOutput:self.captureMovieFileOutput]; } //创建视频预览层，用于实时展示摄像头状态 self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session]; self.previewLayer.frame = self.view.bounds;//CGRectMake(0, 0, self.view.width, self.view.height); self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;//填充模式 [self.bgView.layer addSublayer:self.previewLayer]; [self addNotificationToCaptureDevice:captureDevice]; [self addGenstureRecognizer];} - (IBAction)onCancelAction:(UIButton *)sender { [self dismissViewControllerAnimated:YES completion:^{  [Utility hideProgressDialog]; }];}- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { if ([[touches anyObject] view] == self.imgRecord) {  Plog(@"开始录制");  //根据设备输出获得连接  AVCaptureConnection *connection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeAudio];  //根据连接取得设备输出的数据  if (![self.captureMovieFileOutput isRecording]) {   //如果支持多任务则开始多任务   if ([[UIDevice currentDevice] isMultitaskingSupported]) {    self.backgroundTaskIdentifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];   }   if (self.saveVideoUrl) {    [[NSFileManager defaultManager] removeItemAtURL:self.saveVideoUrl error:nil];   }   //预览图层和视频方向保持一致   connection.videoOrientation = [self.previewLayer connection].videoOrientation;   NSString *outputFielPath=[NSTemporaryDirectory() stringByAppendingString:@"myMovie.mov"];   NSLog(@"save path is :%@",outputFielPath);   NSURL *fileUrl=[NSURL fileURLWithPath:outputFielPath];   NSLog(@"fileUrl:%@",fileUrl);   [self.captureMovieFileOutput startRecordingToOutputFileURL:fileUrl recordingDelegate:self];  } else {   [self.captureMovieFileOutput stopRecording];  } }}- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { if ([[touches anyObject] view] == self.imgRecord) {  Plog(@"结束触摸");  if (!self.isVideo) {   [self performSelector:@selector(endRecord) withObject:nil afterDelay:0.3];  } else {   [self endRecord];  } }}- (void)endRecord { [self.captureMovieFileOutput stopRecording];//停止录制}- (IBAction)onAfreshAction:(UIButton *)sender { Plog(@"重新录制"); [self recoverLayout];}- (IBAction)onEnsureAction:(UIButton *)sender { Plog(@"确定 这里进行保存或者发送出去"); if (self.saveVideoUrl) {  WS(weakSelf)  [Utility showProgressDialogText:@"视频处理中..."];  ALAssetsLibrary *assetsLibrary=[[ALAssetsLibrary alloc]init];  [assetsLibrary writeVideoAtPathToSavedPhotosAlbum:self.saveVideoUrl completionBlock:^(NSURL *assetURL, NSError *error) {   Plog(@"outputUrl:%@",weakSelf.saveVideoUrl);   [[NSFileManager defaultManager] removeItemAtURL:weakSelf.saveVideoUrl error:nil];   if (weakSelf.lastBackgroundTaskIdentifier!= UIBackgroundTaskInvalid) {    [[UIApplication sharedApplication] endBackgroundTask:weakSelf.lastBackgroundTaskIdentifier];   }   if (error) {    Plog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizedDescription);    [Utility showAllTextDialog:KAppDelegate.window Text:@"保存视频到相册发生错误"];   } else {    if (weakSelf.takeBlock) {     weakSelf.takeBlock(assetURL);    }    Plog(@"成功保存视频到相簿.");    [weakSelf onCancelAction:nil];   }  }]; } else {  //照片  UIImageWriteToSavedPhotosAlbum(self.takeImage, self, nil, nil);  if (self.takeBlock) {   self.takeBlock(self.takeImage);  }  [self onCancelAction:nil]; }}//前后摄像头的切换- (IBAction)onCameraAction:(UIButton *)sender { Plog(@"切换摄像头"); AVCaptureDevice *currentDevice=[self.captureDeviceInput device]; AVCaptureDevicePosition currentPosition=[currentDevice position]; [self removeNotificationFromCaptureDevice:currentDevice]; AVCaptureDevice *toChangeDevice; AVCaptureDevicePosition toChangePosition = AVCaptureDevicePositionFront;//前 if (currentPosition == AVCaptureDevicePositionUnspecified || currentPosition == AVCaptureDevicePositionFront) {  toChangePosition = AVCaptureDevicePositionBack;//后 } toChangeDevice=[self getCameraDeviceWithPosition:toChangePosition]; [self addNotificationToCaptureDevice:toChangeDevice]; //获得要调整的设备输入对象 AVCaptureDeviceInput *toChangeDeviceInput=[[AVCaptureDeviceInput alloc]initWithDevice:toChangeDevice error:nil]; //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.session beginConfiguration]; //移除原有输入对象 [self.session removeInput:self.captureDeviceInput]; //添加新的输入对象 if ([self.session canAddInput:toChangeDeviceInput]) {  [self.session addInput:toChangeDeviceInput];  self.captureDeviceInput = toChangeDeviceInput; } //提交会话配置 [self.session commitConfiguration];}- (void)onStartTranscribe:(NSURL *)fileURL { if ([self.captureMovieFileOutput isRecording]) {  -- self.seconds;  if (self.seconds > 0) {   if (self.HSeconds - self.seconds >= TimeMax && !self.isVideo) {    self.isVideo = YES;//长按时间超过TimeMax 表示是视频录制    self.progressView.timeMax = self.seconds;   }   [self performSelector:@selector(onStartTranscribe:) withObject:fileURL afterDelay:1.0];  } else {   if ([self.captureMovieFileOutput isRecording]) {    [self.captureMovieFileOutput stopRecording];   }  } }}#pragma mark - 视频输出代理-(void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections{ Plog(@"开始录制..."); self.seconds = self.HSeconds; [self performSelector:@selector(onStartTranscribe:) withObject:fileURL afterDelay:1.0];}-(void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{ Plog(@"视频录制完成."); [self changeLayout]; if (self.isVideo) {  self.saveVideoUrl = outputFileURL;  if (!self.player) {   self.player = [[HAVPlayer alloc] initWithFrame:self.bgView.bounds withShowInView:self.bgView url:outputFileURL];  } else {   if (outputFileURL) {    self.player.videoUrl = outputFileURL;    self.player.hidden = NO;   }  } } else {  //照片  self.saveVideoUrl = nil;  [self videoHandlePhoto:outputFileURL]; }}- (void)videoHandlePhoto:(NSURL *)url { AVURLAsset *urlSet = [AVURLAsset assetWithURL:url]; AVAssetImageGenerator *imageGenerator = [AVAssetImageGenerator assetImageGeneratorWithAsset:urlSet]; imageGenerator.appliesPreferredTrackTransform = YES; // 截图的时候调整到正确的方向 NSError *error = nil; CMTime time = CMTimeMake(0,30);//缩略图创建时间 CMTime是表示电影时间信息的结构体，第一个参数表示是视频第几秒，第二个参数表示每秒帧数.(如果要获取某一秒的第几帧可以使用CMTimeMake方法) CMTime actucalTime; //缩略图实际生成的时间 CGImageRef cgImage = [imageGenerator copyCGImageAtTime:time actualTime:&actucalTime error:&error]; if (error) {  Plog(@"截取视频图片失败:%@",error.localizedDescription); } CMTimeShow(actucalTime); UIImage *image = [UIImage imageWithCGImage:cgImage]; CGImageRelease(cgImage); if (image) {  Plog(@"视频截取成功"); } else {  Plog(@"视频截取失败"); } self.takeImage = image;//[UIImage imageWithCGImage:cgImage]; [[NSFileManager defaultManager] removeItemAtURL:url error:nil]; if (!self.takeImageView) {  self.takeImageView = [[UIImageView alloc] initWithFrame:self.view.frame];  [self.bgView addSubview:self.takeImageView]; } self.takeImageView.hidden = NO; self.takeImageView.image = self.takeImage;}#pragma mark - 通知//注册通知- (void)setupObservers{ NSNotificationCenter *notification = [NSNotificationCenter defaultCenter]; [notification addObserver:self selector:@selector(applicationDidEnterBackground:) name:UIApplicationWillResignActiveNotification object:[UIApplication sharedApplication]];}//进入后台就退出视频录制- (void)applicationDidEnterBackground:(NSNotification *)notification { [self onCancelAction:nil];}/** * 给输入设备添加通知 */-(void)addNotificationToCaptureDevice:(AVCaptureDevice *)captureDevice{ //注意添加区域改变捕获通知必须首先设置设备允许捕获 [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {  captureDevice.subjectAreaChangeMonitoringEnabled=YES; }]; NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter]; //捕获区域发生改变 [notificationCenter addObserver:self selector:@selector(areaChange:) name:AVCaptureDeviceSubjectAreaDidChangeNotification object:captureDevice];}-(void)removeNotificationFromCaptureDevice:(AVCaptureDevice *)captureDevice{ NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter]; [notificationCenter removeObserver:self name:AVCaptureDeviceSubjectAreaDidChangeNotification object:captureDevice];}/** * 移除所有通知 */-(void)removeNotification{ NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter]; [notificationCenter removeObserver:self];}-(void)addNotificationToCaptureSession:(AVCaptureSession *)captureSession{ NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter]; //会话出错 [notificationCenter addObserver:self selector:@selector(sessionRuntimeError:) name:AVCaptureSessionRuntimeErrorNotification object:captureSession];}/** * 设备连接成功 * * @param notification 通知对象 */-(void)deviceConnected:(NSNotification *)notification{ NSLog(@"设备已连接...");}/** * 设备连接断开 * * @param notification 通知对象 */-(void)deviceDisconnected:(NSNotification *)notification{ NSLog(@"设备已断开.");}/** * 捕获区域改变 * * @param notification 通知对象 */-(void)areaChange:(NSNotification *)notification{ NSLog(@"捕获区域改变...");}/** * 会话出错 * * @param notification 通知对象 */-(void)sessionRuntimeError:(NSNotification *)notification{ NSLog(@"会话发生错误.");} /** * 取得指定位置的摄像头 * * @param position 摄像头位置 * * @return 摄像头设备 */-(AVCaptureDevice *)getCameraDeviceWithPosition:(AVCaptureDevicePosition )position{ NSArray *cameras= [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]; for (AVCaptureDevice *camera in cameras) {  if ([camera position] == position) {   return camera;  } } return nil;}/** * 改变设备属性的统一操作方法 * * @param propertyChange 属性改变操作 */-(void)changeDeviceProperty:(PropertyChangeBlock)propertyChange{ AVCaptureDevice *captureDevice= [self.captureDeviceInput device]; NSError *error; //注意改变设备属性前一定要首先调用lockForConfiguration:调用完之后使用unlockForConfiguration方法解锁 if ([captureDevice lockForConfiguration:&error]) {  //自动白平衡  if ([captureDevice isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance]) {   [captureDevice setWhiteBalanceMode:AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance];  }  //自动根据环境条件开启闪光灯  if ([captureDevice isFlashModeSupported:AVCaptureFlashModeAuto]) {   [captureDevice setFlashMode:AVCaptureFlashModeAuto];  }  propertyChange(captureDevice);  [captureDevice unlockForConfiguration]; }else{  NSLog(@"设置设备属性过程发生错误，错误信息：%@",error.localizedDescription); }}/** * 设置闪光灯模式 * * @param flashMode 闪光灯模式 */-(void)setFlashMode:(AVCaptureFlashMode )flashMode{ [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {  if ([captureDevice isFlashModeSupported:flashMode]) {   [captureDevice setFlashMode:flashMode];  } }];}/** * 设置聚焦模式 * * @param focusMode 聚焦模式 */-(void)setFocusMode:(AVCaptureFocusMode )focusMode{ [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {  if ([captureDevice isFocusModeSupported:focusMode]) {   [captureDevice setFocusMode:focusMode];  } }];}/** * 设置曝光模式 * * @param exposureMode 曝光模式 */-(void)setExposureMode:(AVCaptureExposureMode)exposureMode{ [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {  if ([captureDevice isExposureModeSupported:exposureMode]) {   [captureDevice setExposureMode:exposureMode];  } }];}/** * 设置聚焦点 * * @param point 聚焦点 */-(void)focusWithMode:(AVCaptureFocusMode)focusMode exposureMode:(AVCaptureExposureMode)exposureMode atPoint:(CGPoint)point{ [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {//  if ([captureDevice isFocusPointOfInterestSupported]) {//   [captureDevice setFocusPointOfInterest:point];//  }//  if ([captureDevice isExposurePointOfInterestSupported]) {//   [captureDevice setExposurePointOfInterest:point];//  }  if ([captureDevice isExposureModeSupported:exposureMode]) {   [captureDevice setExposureMode:exposureMode];  }  if ([captureDevice isFocusModeSupported:focusMode]) {   [captureDevice setFocusMode:focusMode];  } }];}/** * 添加点按手势，点按时聚焦 */-(void)addGenstureRecognizer{ UITapGestureRecognizer *tapGesture=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapScreen:)]; [self.bgView addGestureRecognizer:tapGesture];}-(void)tapScreen:(UITapGestureRecognizer *)tapGesture{ if ([self.session isRunning]) {  CGPoint point= [tapGesture locationInView:self.bgView];  //将UI坐标转化为摄像头坐标  CGPoint cameraPoint= [self.previewLayer captureDevicePointOfInterestForPoint:point];  [self setFocusCursorWithPoint:point];  [self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposureMode:AVCaptureExposureModeContinuousAutoExposure atPoint:cameraPoint]; }}/** * 设置聚焦光标位置 * * @param point 光标位置 */-(void)setFocusCursorWithPoint:(CGPoint)point{ if (!self.isFocus) {  self.isFocus = YES;  self.focusCursor.center=point;  self.focusCursor.transform = CGAffineTransformMakeScale(1.25, 1.25);  self.focusCursor.alpha = 1.0;  [UIView animateWithDuration:0.5 animations:^{   self.focusCursor.transform = CGAffineTransformIdentity;  } completion:^(BOOL finished) {   [self performSelector:@selector(onHiddenFocusCurSorAction) withObject:nil afterDelay:0.5];  }]; }}- (void)onHiddenFocusCurSorAction { self.focusCursor.alpha=0; self.isFocus = NO;}//拍摄完成时调用- (void)changeLayout { self.imgRecord.hidden = YES; self.btnCamera.hidden = YES; self.btnAfresh.hidden = NO; self.btnEnsure.hidden = NO; self.btnBack.hidden = YES; if (self.isVideo) {  [self.progressView clearProgress]; } self.afreshCenterX.constant = -(SCREEN_WIDTH/2/2); self.ensureCenterX.constant = SCREEN_WIDTH/2/2; [UIView animateWithDuration:0.25 animations:^{  [self.view layoutIfNeeded]; }]; self.lastBackgroundTaskIdentifier = self.backgroundTaskIdentifier; self.backgroundTaskIdentifier = UIBackgroundTaskInvalid; [self.session stopRunning];}//重新拍摄时调用- (void)recoverLayout { if (self.isVideo) {  self.isVideo = NO;  [self.player stopPlayer];  self.player.hidden = YES; } [self.session startRunning]; if (!self.takeImageView.hidden) {  self.takeImageView.hidden = YES; }// self.saveVideoUrl = nil; self.afreshCenterX.constant = 0; self.ensureCenterX.constant = 0; self.imgRecord.hidden = NO; self.btnCamera.hidden = NO; self.btnAfresh.hidden = YES; self.btnEnsure.hidden = YES; self.btnBack.hidden = NO; [UIView animateWithDuration:0.25 animations:^{  [self.view layoutIfNeeded]; }];}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller.}*/@end

- (IBAction)onCameraAction:(UIButton *)sender { //额 。。由于是demo,所以用的xib，大家根据需求自己更改，该demo只是提供一个思路，使用时不要直接拖入项目 HVideoViewController *ctrl = [[NSBundle mainBundle] loadNibNamed:@"HVideoViewController" owner:nil options:nil].lastObject; ctrl.HSeconds = 30;//设置可录制最长时间 ctrl.takeBlock = ^(id item) {  if ([item isKindOfClass:[NSURL class]]) {   NSURL *videoURL = item;   //视频url  } else {   //图片  } }; [self presentViewController:ctrl animated:YES completion:nil];}