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

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

#import "HAVPlayer.h"#import <AVFoundation/AVFoundation.h>@interface HAVPlayer ()@property (nonatomic,strong) AVPlayer *player;//播放器對象@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]) {    //創(chuàng)建播放器層    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 {  //監(jiān)控狀態(tài)屬性  [playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];  //監(jiān)控網(wǎng)絡(luò)加載情況屬性  [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];//如果在播放狀態(tài)就停止  }}/** * 通過KVO監(jiān)控播放器狀態(tài) * * @param keyPath 監(jiān)控屬性 * @param object 監(jiān)視器 * @param change 狀態(tài)改變 * @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...，視頻總長度:%.2f",CMTimeGetSeconds(playerItem.duration));    }  }else if([keyPath isEqualToString:@"loadedTimeRanges"]){    NSArray *array=playerItem.loadedTimeRanges;    CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];//本次緩沖時間范圍    float startSeconds = CMTimeGetSeconds(timeRange.start);    float durationSeconds = CMTimeGetSeconds(timeRange.duration);    NSTimeInterval totalBuffer = startSeconds + durationSeconds;//緩沖總長度    NSLog(@"共緩沖：%.2f",totalBuffer);  }}- (void)playbackFinished:(NSNotification *)ntf {  Plog(@"視頻播放完成");  [self.player seekToTime:CMTimeMake(0, 1)];  [self.player play];}@end

#import "HProgressView.h"@interface HProgressView ()/** * 進(jìn)度值0-1.0之間 */@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();//獲取上下文  Plog(@"width = %f",self.frame.size.width);  CGPoint center = CGPointMake(self.frame.size.width/2.0, self.frame.size.width/2.0); //設(shè)置圓心位置  CGFloat radius = self.frame.size.width/2.0-5; //設(shè)置半徑  CGFloat startA = - M_PI_2; //圓起點(diǎn)位置  CGFloat endA = -M_PI_2 + M_PI * 2 * _progressValue; //圓終點(diǎn)位置  UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];  CGContextSetLineWidth(ctx, 10); //設(shè)置線條寬度  [[UIColor whiteColor] setStroke]; //設(shè)置描邊顏色  CGContextAddPath(ctx, path.CGPath); //把路徑添加到上下文  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>//輕觸拍照，按住攝像@property (strong, nonatomic) IBOutlet UILabel *labelTipTitle;//視頻輸出流@property (strong,nonatomic) AVCaptureMovieFileOutput *captureMovieFileOutput;//圖片輸出流//@property (strong,nonatomic) AVCaptureStillImageOutput *captureStillImageOutput;//照片輸出流//負(fù)責(zé)從AVCaptureDevice獲得輸入數(shù)據(jù)@property (strong,nonatomic) AVCaptureDeviceInput *captureDeviceInput;//后臺任務(wù)標(biāo)識@property (assign,nonatomic) UIBackgroundTaskIdentifier backgroundTaskIdentifier;@property (assign,nonatomic) UIBackgroundTaskIdentifier lastBackgroundTaskIdentifier;@property (weak, nonatomic) IBOutlet UIImageView *focusCursor; //聚焦光標(biāo)//負(fù)責(zé)輸入和輸出設(shè)備之間的數(shù)據(jù)傳遞@property(nonatomic)AVCaptureSession *session;//圖像預(yù)覽層，實(shí)時顯示捕獲的圖像@property(nonatomic)AVCaptureVideoPreviewLayer *previewLayer;@property (strong, nonatomic) IBOutlet UIButton *btnBack;//重新錄制@property (strong, nonatomic) IBOutlet UIButton *btnAfresh;//確定@property (strong, nonatomic) IBOutlet UIButton *btnEnsure;//攝像頭切換@property (strong, nonatomic) IBOutlet UIButton *btnCamera;@property (strong, nonatomic) IBOutlet UIImageView *bgView;//記錄錄制的時間 默認(rèn)最大60秒@property (assign, nonatomic) NSInteger seconds;//記錄需要保存視頻的路徑@property (strong, nonatomic) NSURL *saveVideoUrl;//是否在對焦@property (assign, nonatomic) BOOL isFocus;@property (strong, nonatomic) IBOutlet NSLayoutConstraint *afreshCenterX;@property (strong, nonatomic) IBOutlet NSLayoutConstraint *ensureCenterX;@property (strong, nonatomic) IBOutlet NSLayoutConstraint *backCenterX;//視頻播放@property (strong, nonatomic) HAVPlayer *player;@property (strong, nonatomic) IBOutlet HProgressView *progressView;//是否是攝像 YES 代表是錄制 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//時間大于這個就是視頻，否則為拍照#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 {  //初始化會話，用來結(jié)合輸入輸出  self.session = [[AVCaptureSession alloc] init];  //設(shè)置分辨率 (設(shè)備支持的最高分辨率)  if ([self.session canSetSessionPreset:AVCaptureSessionPresetHigh]) {    self.session.sessionPreset = AVCaptureSessionPresetHigh;  }  //取得后置攝像頭  AVCaptureDevice *captureDevice = [self getCameraDeviceWithPosition:AVCaptureDevicePositionBack];  //添加一個音頻輸入設(shè)備  AVCaptureDevice *audioCaptureDevice=[[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject];  //初始化輸入設(shè)備  NSError *error = nil;  self.captureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:captureDevice error:&error];  if (error) {    Plog(@"取得設(shè)備輸入對象時出錯，錯誤原因：%@",error.localizedDescription);    return;  }  //添加音頻  error = nil;  AVCaptureDeviceInput *audioCaptureDeviceInput=[[AVCaptureDeviceInput alloc]initWithDevice:audioCaptureDevice error:&error];  if (error) {    NSLog(@"取得設(shè)備輸入對象時出錯，錯誤原因：%@",error.localizedDescription);    return;  }  //輸出對象  self.captureMovieFileOutput = [[AVCaptureMovieFileOutput alloc] init];//視頻輸出  //將輸入設(shè)備添加到會話  if ([self.session canAddInput:self.captureDeviceInput]) {    [self.session addInput:self.captureDeviceInput];    [self.session addInput:audioCaptureDeviceInput];    //設(shè)置視頻防抖    AVCaptureConnection *connection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo];    if ([connection isVideoStabilizationSupported]) {      connection.preferredVideoStabilizationMode = AVCaptureVideoStabilizationModeCinematic;    }  }  //將輸出設(shè)備添加到會話 (剛開始 是照片為輸出對象)  if ([self.session canAddOutput:self.captureMovieFileOutput]) {    [self.session addOutput:self.captureMovieFileOutput];  }  //創(chuàng)建視頻預(yù)覽層，用于實(shí)時展示攝像頭狀態(tài)  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(@"開始錄制");    //根據(jù)設(shè)備輸出獲得連接    AVCaptureConnection *connection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeAudio];    //根據(jù)連接取得設(shè)備輸出的數(shù)據(jù)    if (![self.captureMovieFileOutput isRecording]) {      //如果支持多任務(wù)則開始多任務(wù)      if ([[UIDevice currentDevice] isMultitaskingSupported]) {        self.backgroundTaskIdentifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];      }      if (self.saveVideoUrl) {        [[NSFileManager defaultManager] removeItemAtURL:self.saveVideoUrl error:nil];      }      //預(yù)覽圖層和視頻方向保持一致      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(@"結(jié)束觸摸");    if (!self.isVideo) {      [self performSelector:@selector(endRecord) withObject:nil afterDelay:0.3];    } else {      [self endRecord];    }  }}- (void)endRecord {  [self.captureMovieFileOutput stopRecording];//停止錄制}- (IBAction)onAfreshAction:(UIButton *)sender {  Plog(@"重新錄制");  [self recoverLayout];}- (IBAction)onEnsureAction:(UIButton *)sender {  Plog(@"確定 這里進(jìn)行保存或者發(fā)送出去");  if (self.saveVideoUrl) {    WS(weakSelf)    [Utility showProgressDialogText:@"視頻處理中..."];    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(@"保存視頻到相簿過程中發(fā)生錯誤，錯誤信息：%@",error.localizedDescription);        [Utility showAllTextDialog:KAppDelegate.window Text:@"保存視頻到相冊發(fā)生錯誤"];      } else {        if (weakSelf.takeBlock) {          weakSelf.takeBlock(assetURL);        }        Plog(@"成功保存視頻到相簿.");        [weakSelf onCancelAction:nil];      }    }];  } else {    //照片    UIImageWriteToSavedPhotosAlbum(self.takeImage, self, nil, nil);    if (self.takeBlock) {      self.takeBlock(self.takeImage);    }    [self onCancelAction:nil];  }}//前后攝像頭的切換- (IBAction)onCameraAction:(UIButton *)sender {  Plog(@"切換攝像頭");  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];  //獲得要調(diào)整的設(shè)備輸入對象  AVCaptureDeviceInput *toChangeDeviceInput=[[AVCaptureDeviceInput alloc]initWithDevice:toChangeDevice error:nil];  //改變會話的配置前一定要先開啟配置，配置完成后提交配置改變  [self.session beginConfiguration];  //移除原有輸入對象  [self.session removeInput:self.captureDeviceInput];  //添加新的輸入對象  if ([self.session canAddInput:toChangeDeviceInput]) {    [self.session addInput:toChangeDeviceInput];    self.captureDeviceInput = toChangeDeviceInput;  }  //提交會話配置  [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;//長按時間超過TimeMax 表示是視頻錄制        self.progressView.timeMax = self.seconds;      }      [self performSelector:@selector(onStartTranscribe:) withObject:fileURL afterDelay:1.0];    } else {      if ([self.captureMovieFileOutput isRecording]) {        [self.captureMovieFileOutput stopRecording];      }    }  }}#pragma mark - 視頻輸出代理-(void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections{  Plog(@"開始錄制...");  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(@"視頻錄制完成.");  [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;  // 截圖的時候調(diào)整到正確的方向  NSError *error = nil;  CMTime time = CMTimeMake(0,30);//縮略圖創(chuàng)建時間 CMTime是表示電影時間信息的結(jié)構(gòu)體，第一個參數(shù)表示是視頻第幾秒，第二個參數(shù)表示每秒幀數(shù).(如果要獲取某一秒的第幾幀可以使用CMTimeMake方法)  CMTime actucalTime; //縮略圖實(shí)際生成的時間  CGImageRef cgImage = [imageGenerator copyCGImageAtTime:time actualTime:&actucalTime error:&error];  if (error) {    Plog(@"截取視頻圖片失敗:%@",error.localizedDescription);  }  CMTimeShow(actucalTime);  UIImage *image = [UIImage imageWithCGImage:cgImage];  CGImageRelease(cgImage);  if (image) {    Plog(@"視頻截取成功");  } else {    Plog(@"視頻截取失敗");  }  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//注冊通知- (void)setupObservers{  NSNotificationCenter *notification = [NSNotificationCenter defaultCenter];  [notification addObserver:self selector:@selector(applicationDidEnterBackground:) name:UIApplicationWillResignActiveNotification object:[UIApplication sharedApplication]];}//進(jìn)入后臺就退出視頻錄制- (void)applicationDidEnterBackground:(NSNotification *)notification {  [self onCancelAction:nil];}/** * 給輸入設(shè)備添加通知 */-(void)addNotificationToCaptureDevice:(AVCaptureDevice *)captureDevice{  //注意添加區(qū)域改變捕獲通知必須首先設(shè)置設(shè)備允許捕獲  [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {    captureDevice.subjectAreaChangeMonitoringEnabled=YES;  }];  NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter];  //捕獲區(qū)域發(fā)生改變  [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];  //會話出錯  [notificationCenter addObserver:self selector:@selector(sessionRuntimeError:) name:AVCaptureSessionRuntimeErrorNotification object:captureSession];}/** * 設(shè)備連接成功 * * @param notification 通知對象 */-(void)deviceConnected:(NSNotification *)notification{  NSLog(@"設(shè)備已連接...");}/** * 設(shè)備連接斷開 * * @param notification 通知對象 */-(void)deviceDisconnected:(NSNotification *)notification{  NSLog(@"設(shè)備已斷開.");}/** * 捕獲區(qū)域改變 * * @param notification 通知對象 */-(void)areaChange:(NSNotification *)notification{  NSLog(@"捕獲區(qū)域改變...");}/** * 會話出錯 * * @param notification 通知對象 */-(void)sessionRuntimeError:(NSNotification *)notification{  NSLog(@"會話發(fā)生錯誤.");}/** * 取得指定位置的攝像頭 * * @param position 攝像頭位置 * * @return 攝像頭設(shè)備 */-(AVCaptureDevice *)getCameraDeviceWithPosition:(AVCaptureDevicePosition )position{  NSArray *cameras= [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];  for (AVCaptureDevice *camera in cameras) {    if ([camera position] == position) {      return camera;    }  }  return nil;}/** * 改變設(shè)備屬性的統(tǒng)一操作方法 * * @param propertyChange 屬性改變操作 */-(void)changeDeviceProperty:(PropertyChangeBlock)propertyChange{  AVCaptureDevice *captureDevice= [self.captureDeviceInput device];  NSError *error;  //注意改變設(shè)備屬性前一定要首先調(diào)用lockForConfiguration:調(diào)用完之后使用unlockForConfiguration方法解鎖  if ([captureDevice lockForConfiguration:&error]) {    //自動白平衡    if ([captureDevice isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance]) {      [captureDevice setWhiteBalanceMode:AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance];    }    //自動根據(jù)環(huán)境條件開啟閃光燈    if ([captureDevice isFlashModeSupported:AVCaptureFlashModeAuto]) {      [captureDevice setFlashMode:AVCaptureFlashModeAuto];    }    propertyChange(captureDevice);    [captureDevice unlockForConfiguration];  }else{    NSLog(@"設(shè)置設(shè)備屬性過程發(fā)生錯誤，錯誤信息：%@",error.localizedDescription);  }}/** * 設(shè)置閃光燈模式 * * @param flashMode 閃光燈模式 */-(void)setFlashMode:(AVCaptureFlashMode )flashMode{  [self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {    if ([captureDevice isFlashModeSupported:flashMode]) {      [captureDevice setFlashMode:flashMode];    }  }];}/** * 設(shè)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];    }  }];}/** * 設(shè)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];    }  }];}/** * 設(shè)置聚焦點(diǎn) * * @param point 聚焦點(diǎn) */-(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];    }  }];}/** * 添加點(diǎn)按手勢，點(diǎn)按時聚焦 */-(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];    //將UI坐標(biāo)轉(zhuǎn)化為攝像頭坐標(biāo)    CGPoint cameraPoint= [self.previewLayer captureDevicePointOfInterestForPoint:point];    [self setFocusCursorWithPoint:point];    [self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposureMode:AVCaptureExposureModeContinuousAutoExposure atPoint:cameraPoint];  }}/** * 設(shè)置聚焦光標(biāo)位置 * * @param point 光標(biāo)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;}//拍攝完成時調(diào)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];}//重新拍攝時調(diào)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 {  //額 。。由于是demo,所以用的xib，大家根據(jù)需求自己更改，該demo只是提供一個思路，使用時不要直接拖入項(xiàng)目  HVideoViewController *ctrl = [[NSBundle mainBundle] loadNibNamed:@"HVideoViewController" owner:nil options:nil].lastObject;  ctrl.HSeconds = 30;//設(shè)置可錄制最長時間  ctrl.takeBlock = ^(id item) {    if ([item isKindOfClass:[NSURL class]]) {      NSURL *videoURL = item;      //視頻url    } else {      //圖片    }  };  [self presentViewController:ctrl animated:YES completion:nil];}