iOS仿微信相机拍照、视频录制功能

2023-09-13 04:30:04 57

网上有很多自定义相机的例子，这里只是我临时写的一个iOS自定义相机（仿微信）拍照、视频录制demo，仅供参考：

用到了下面几个库：

#import
#import

在使用的时候需要在Info.plist中把相关权限写进去：

Privacy-MicrophoneUsageDescription
Privacy-PhotoLibraryUsageDescription
Privacy-CameraUsageDescription

我在写这个demo时，是按照微信的样式写的，同样是点击拍照、长按录制视频，视频录制完直接进行播放，这里封装了一个简易的播放器：

m文件

#import"HAVPlayer.h"
#import

@interfaceHAVPlayer()

@property(nonatomic,strong)AVPlayer*player;//播放器对象

@end

@implementationHAVPlayer

/*
//OnlyoverridedrawRect:ifyouperformcustomdrawing.
//Anemptyimplementationadverselyaffectsperformanceduringanimation.
-(void)drawRect:(CGRect)rect{
//Drawingcode
}
*/

-(instancetype)initWithFrame:(CGRect)framewithShowInView:(UIView*)bgViewurl:(NSURL*)url{
if(self=[selfinitWithFrame:frame]){
//创建播放器层
AVPlayerLayer*playerLayer=[AVPlayerLayerplayerLayerWithPlayer:self.player];
playerLayer.frame=self.bounds;

[self.layeraddSublayer:playerLayer];
if(url){
self.videoUrl=url;
}

[bgViewaddSubview:self];
}
returnself;
}

-(void)dealloc{
[selfremoveAvPlayerNtf];
[selfstopPlayer];
self.player=nil;
}

-(AVPlayer*)player{
if(!_player){
_player=[AVPlayerplayerWithPlayerItem:[selfgetAVPlayerItem]];
[selfaddAVPlayerNtf:_player.currentItem];

}

return_player;
}

-(AVPlayerItem*)getAVPlayerItem{
AVPlayerItem*playerItem=[AVPlayerItemplayerItemWithURL:self.videoUrl];
returnplayerItem;
}

-(void)setVideoUrl:(NSURL*)videoUrl{
_videoUrl=videoUrl;
[selfremoveAvPlayerNtf];
[selfnextPlayer];
}

-(void)nextPlayer{
[self.playerseekToTime:CMTimeMakeWithSeconds(0,_player.currentItem.duration.timescale)];
[self.playerreplaceCurrentItemWithPlayerItem:[selfgetAVPlayerItem]];
[selfaddAVPlayerNtf:self.player.currentItem];
if(self.player.rate==0){
[self.playerplay];
}
}

-(void)addAVPlayerNtf:(AVPlayerItem*)playerItem{
//监控状态属性
[playerItemaddObserver:selfforKeyPath:@"status"options:NSKeyValueObservingOptionNewcontext:nil];
//监控网络加载情况属性
[playerItemaddObserver:selfforKeyPath:@"loadedTimeRanges"options:NSKeyValueObservingOptionNewcontext:nil];

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(playbackFinished:)name:AVPlayerItemDidPlayToEndTimeNotificationobject:self.player.currentItem];
}

-(void)removeAvPlayerNtf{
AVPlayerItem*playerItem=self.player.currentItem;
[playerItemremoveObserver:selfforKeyPath:@"status"];
[playerItemremoveObserver:selfforKeyPath:@"loadedTimeRanges"];
[[NSNotificationCenterdefaultCenter]removeObserver:self];
}

-(void)stopPlayer{
if(self.player.rate==1){
[self.playerpause];//如果在播放状态就停止
}
}

/**
*通过KVO监控播放器状态
*
*@paramkeyPath监控属性
*@paramobject监视器
*@paramchange状态改变
*@paramcontext上下文
*/
-(void)observeValueForKeyPath:(NSString*)keyPathofObject:(id)objectchange:(NSDictionary*)changecontext:(void*)context{
AVPlayerItem*playerItem=object;
if([keyPathisEqualToString:@"status"]){
AVPlayerStatusstatus=[[changeobjectForKey:@"new"]intValue];
if(status==AVPlayerStatusReadyToPlay){
NSLog(@"正在播放...，视频总长度:%.2f",CMTimeGetSeconds(playerItem.duration));
}
}elseif([keyPathisEqualToString:@"loadedTimeRanges"]){
NSArray*array=playerItem.loadedTimeRanges;
CMTimeRangetimeRange=[array.firstObjectCMTimeRangeValue];//本次缓冲时间范围
floatstartSeconds=CMTimeGetSeconds(timeRange.start);
floatdurationSeconds=CMTimeGetSeconds(timeRange.duration);
NSTimeIntervaltotalBuffer=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.playerseekToTime:CMTimeMake(0,1)];
[self.playerplay];
}

@end

另外微信下面的按钮长按会出现圆弧时间条：

m文件

#import"HProgressView.h"

@interfaceHProgressView()

/**
*进度值0-1.0之间
*/
@property(nonatomic,assign)CGFloatprogressValue;

@property(nonatomic,assign)CGFloatcurrentTime;

@end

@implementationHProgressView


//OnlyoverridedrawRect:ifyouperformcustomdrawing.
//Anemptyimplementationadverselyaffectsperformanceduringanimation.
-(void)drawRect:(CGRect)rect{
//Drawingcode
CGContextRefctx=UIGraphicsGetCurrentContext();//获取上下文
Plog(@"width=%f",self.frame.size.width);
CGPointcenter=CGPointMake(self.frame.size.width/2.0,self.frame.size.width/2.0);//设置圆心位置
CGFloatradius=self.frame.size.width/2.0-5;//设置半径
CGFloatstartA=-M_PI_2;//圆起点位置
CGFloatendA=-M_PI_2+M_PI*2*_progressValue;//圆终点位置

UIBezierPath*path=[UIBezierPathbezierPathWithArcCenter:centerradius:radiusstartAngle:startAendAngle:endAclockwise:YES];

CGContextSetLineWidth(ctx,10);//设置线条宽度
[[UIColorwhiteColor]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;
[selfsetNeedsDisplay];
self.hidden=NO;
[selfperformSelector:@selector(startProgress)withObject:nilafterDelay:0.1];
}

-(void)clearProgress{
_currentTime=_timeMax;
self.hidden=YES;
}

-(void)startProgress{
_currentTime+=0.1;
if(_timeMax>_currentTime){
_progressValue=_currentTime/_timeMax;
Plog(@"progress=%f",_progressValue);
[selfsetNeedsDisplay];
[selfperformSelector:@selector(startProgress)withObject:nilafterDelay:0.1];
}

if(_timeMax<=_currentTime){
[selfclearProgress];

}
}

@end

接下来就是相机的控制器了，由于是临时写的，所以用的xib，大家不要直接使用，直接上m文件代码吧：

#import"HVideoViewController.h"
#import
#import"HAVPlayer.h"
#import"HProgressView.h"
#import
#import

typedefvoid(^PropertyChangeBlock)(AVCaptureDevice*captureDevice);
@interfaceHVideoViewController()

//轻触拍照，按住摄像
@property(strong,nonatomic)IBOutletUILabel*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)UIBackgroundTaskIdentifierbackgroundTaskIdentifier;

@property(assign,nonatomic)UIBackgroundTaskIdentifierlastBackgroundTaskIdentifier;

@property(weak,nonatomic)IBOutletUIImageView*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)IBOutletUIButton*btnBack;
//重新录制
@property(strong,nonatomic)IBOutletUIButton*btnAfresh;
//确定
@property(strong,nonatomic)IBOutletUIButton*btnEnsure;
//摄像头切换
@property(strong,nonatomic)IBOutletUIButton*btnCamera;

@property(strong,nonatomic)IBOutletUIImageView*bgView;
//记录录制的时间默认最大60秒
@property(assign,nonatomic)NSIntegerseconds;

//记录需要保存视频的路径
@property(strong,nonatomic)NSURL*saveVideoUrl;

//是否在对焦
@property(assign,nonatomic)BOOLisFocus;
@property(strong,nonatomic)IBOutletNSLayoutConstraint*afreshCenterX;
@property(strong,nonatomic)IBOutletNSLayoutConstraint*ensureCenterX;
@property(strong,nonatomic)IBOutletNSLayoutConstraint*backCenterX;

//视频播放
@property(strong,nonatomic)HAVPlayer*player;

@property(strong,nonatomic)IBOutletHProgressView*progressView;

//是否是摄像YES代表是录制NO表示拍照
@property(assign,nonatomic)BOOLisVideo;

@property(strong,nonatomic)UIImage*takeImage;
@property(strong,nonatomic)UIImageView*takeImageView;
@property(strong,nonatomic)IBOutletUIImageView*imgRecord;


@end

//时间大于这个就是视频，否则为拍照
#defineTimeMax1

@implementationHVideoViewController


-(void)dealloc{
[selfremoveNotification];


}

-(void)viewDidLoad{
[superviewDidLoad];
//Doanyadditionalsetupafterloadingtheview.

UIImage*image=[UIImageimageNamed:@"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;
}

[selfperformSelector:@selector(hiddenTipsLabel)withObject:nilafterDelay:4];
}

-(void)hiddenTipsLabel{
self.labelTipTitle.hidden=YES;
}

-(void)didReceiveMemoryWarning{
[superdidReceiveMemoryWarning];
//Disposeofanyresourcesthatcanberecreated.
}

-(void)viewWillAppear:(BOOL)animated{
[superviewWillAppear:animated];
[[UIApplicationsharedApplication]setStatusBarHidden:YES];
[selfcustomCamera];
[self.sessionstartRunning];
}


-(void)viewDidAppear:(BOOL)animated{
[superviewDidAppear:animated];
}

-(void)viewDidDisappear:(BOOL)animated{
[superviewDidDisappear:animated];
[self.sessionstopRunning];
}

-(void)viewWillDisappear:(BOOL)animated{
[superviewWillDisappear:animated];
[[UIApplicationsharedApplication]setStatusBarHidden:NO];
}

-(void)customCamera{

//初始化会话，用来结合输入输出
self.session=[[AVCaptureSessionalloc]init];
//设置分辨率(设备支持的最高分辨率)
if([self.sessioncanSetSessionPreset:AVCaptureSessionPresetHigh]){
self.session.sessionPreset=AVCaptureSessionPresetHigh;
}
//取得后置摄像头
AVCaptureDevice*captureDevice=[selfgetCameraDeviceWithPosition:AVCaptureDevicePositionBack];
//添加一个音频输入设备
AVCaptureDevice*audioCaptureDevice=[[AVCaptureDevicedevicesWithMediaType:AVMediaTypeAudio]firstObject];

//初始化输入设备
NSError*error=nil;
self.captureDeviceInput=[[AVCaptureDeviceInputalloc]initWithDevice:captureDeviceerror:&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=[[AVCaptureDeviceInputalloc]initWithDevice:audioCaptureDeviceerror:&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=[[AVCaptureMovieFileOutputalloc]init];//视频输出

//将输入设备添加到会话
if([self.sessioncanAddInput:self.captureDeviceInput]){
[self.sessionaddInput:self.captureDeviceInput];
[self.sessionaddInput:audioCaptureDeviceInput];
//设置视频防抖
AVCaptureConnection*connection=[self.captureMovieFileOutputconnectionWithMediaType:AVMediaTypeVideo];
if([connectionisVideoStabilizationSupported]){
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.sessioncanAddOutput:self.captureMovieFileOutput]){
[self.sessionaddOutput:self.captureMovieFileOutput];
}

//创建视频预览层，用于实时展示摄像头状态
self.previewLayer=[[AVCaptureVideoPreviewLayeralloc]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.layeraddSublayer:self.previewLayer];

[selfaddNotificationToCaptureDevice:captureDevice];
[selfaddGenstureRecognizer];
}



-(IBAction)onCancelAction:(UIButton*)sender{
[selfdismissViewControllerAnimated:YEScompletion:^{
[UtilityhideProgressDialog];
}];
}


-(void)touchesBegan:(NSSet*)toucheswithEvent:(UIEvent*)event{
if([[touchesanyObject]view]==self.imgRecord){
Plog(@"开始录制");
//根据设备输出获得连接
AVCaptureConnection*connection=[self.captureMovieFileOutputconnectionWithMediaType:AVMediaTypeAudio];
//根据连接取得设备输出的数据
if(![self.captureMovieFileOutputisRecording]){
//如果支持多任务则开始多任务
if([[UIDevicecurrentDevice]isMultitaskingSupported]){
self.backgroundTaskIdentifier=[[UIApplicationsharedApplication]beginBackgroundTaskWithExpirationHandler:nil];
}
if(self.saveVideoUrl){
[[NSFileManagerdefaultManager]removeItemAtURL:self.saveVideoUrlerror:nil];
}
//预览图层和视频方向保持一致
connection.videoOrientation=[self.previewLayerconnection].videoOrientation;
NSString*outputFielPath=[NSTemporaryDirectory()stringByAppendingString:@"myMovie.mov"];
NSLog(@"savepathis:%@",outputFielPath);
NSURL*fileUrl=[NSURLfileURLWithPath:outputFielPath];
NSLog(@"fileUrl:%@",fileUrl);
[self.captureMovieFileOutputstartRecordingToOutputFileURL:fileUrlrecordingDelegate:self];
}else{
[self.captureMovieFileOutputstopRecording];
}
}
}


-(void)touchesEnded:(NSSet*)toucheswithEvent:(UIEvent*)event{
if([[touchesanyObject]view]==self.imgRecord){
Plog(@"结束触摸");
if(!self.isVideo){
[selfperformSelector:@selector(endRecord)withObject:nilafterDelay:0.3];
}else{
[selfendRecord];
}
}
}

-(void)endRecord{
[self.captureMovieFileOutputstopRecording];//停止录制
}

-(IBAction)onAfreshAction:(UIButton*)sender{
Plog(@"重新录制");
[selfrecoverLayout];
}

-(IBAction)onEnsureAction:(UIButton*)sender{
Plog(@"确定这里进行保存或者发送出去");
if(self.saveVideoUrl){
WS(weakSelf)
[UtilityshowProgressDialogText:@"视频处理中..."];
ALAssetsLibrary*assetsLibrary=[[ALAssetsLibraryalloc]init];
[assetsLibrarywriteVideoAtPathToSavedPhotosAlbum:self.saveVideoUrlcompletionBlock:^(NSURL*assetURL,NSError*error){
Plog(@"outputUrl:%@",weakSelf.saveVideoUrl);
[[NSFileManagerdefaultManager]removeItemAtURL:weakSelf.saveVideoUrlerror:nil];
if(weakSelf.lastBackgroundTaskIdentifier!=UIBackgroundTaskInvalid){
[[UIApplicationsharedApplication]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);
[UtilityshowAllTextDialog:KAppDelegate.windowText:@"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.");
[weakSelfonCancelAction:nil];
}
}];
}else{
//照片
UIImageWriteToSavedPhotosAlbum(self.takeImage,self,nil,nil);
if(self.takeBlock){
self.takeBlock(self.takeImage);
}

[selfonCancelAction:nil];
}
}

//前后摄像头的切换
-(IBAction)onCameraAction:(UIButton*)sender{
Plog(@"切换摄像头");
AVCaptureDevice*currentDevice=[self.captureDeviceInputdevice];
AVCaptureDevicePositioncurrentPosition=[currentDeviceposition];
[selfremoveNotificationFromCaptureDevice:currentDevice];
AVCaptureDevice*toChangeDevice;
AVCaptureDevicePositiontoChangePosition=AVCaptureDevicePositionFront;//前
if(currentPosition==AVCaptureDevicePositionUnspecified||currentPosition==AVCaptureDevicePositionFront){
toChangePosition=AVCaptureDevicePositionBack;//后
}
toChangeDevice=[selfgetCameraDeviceWithPosition:toChangePosition];
[selfaddNotificationToCaptureDevice:toChangeDevice];
//获得要调整的设备输入对象
AVCaptureDeviceInput*toChangeDeviceInput=[[AVCaptureDeviceInputalloc]initWithDevice:toChangeDeviceerror: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.sessionbeginConfiguration];
//移除原有输入对象
[self.sessionremoveInput:self.captureDeviceInput];
//添加新的输入对象
if([self.sessioncanAddInput:toChangeDeviceInput]){
[self.sessionaddInput:toChangeDeviceInput];
self.captureDeviceInput=toChangeDeviceInput;
}
//提交会话配置
[self.sessioncommitConfiguration];
}

-(void)onStartTranscribe:(NSURL*)fileURL{
if([self.captureMovieFileOutputisRecording]){
--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;
}
[selfperformSelector:@selector(onStartTranscribe:)withObject:fileURLafterDelay:1.0];
}else{
if([self.captureMovieFileOutputisRecording]){
[self.captureMovieFileOutputstopRecording];
}
}
}
}


#pragmamark-视频输出代理
-(void)captureOutput:(AVCaptureFileOutput*)captureOutputdidStartRecordingToOutputFileAtURL:(NSURL*)fileURLfromConnections:(NSArray*)connections{
Plog(@"开始录制...");
self.seconds=self.HSeconds;
[selfperformSelector:@selector(onStartTranscribe:)withObject:fileURLafterDelay:1.0];
}


-(void)captureOutput:(AVCaptureFileOutput*)captureOutputdidFinishRecordingToOutputFileAtURL:(NSURL*)outputFileURLfromConnections:(NSArray*)connectionserror:(NSError*)error{
Plog(@"视频录制完成.");
[selfchangeLayout];
if(self.isVideo){
self.saveVideoUrl=outputFileURL;
if(!self.player){
self.player=[[HAVPlayeralloc]initWithFrame:self.bgView.boundswithShowInView:self.bgViewurl:outputFileURL];
}else{
if(outputFileURL){
self.player.videoUrl=outputFileURL;
self.player.hidden=NO;
}
}
}else{
//照片
self.saveVideoUrl=nil;
[selfvideoHandlePhoto:outputFileURL];
}

}

-(void)videoHandlePhoto:(NSURL*)url{
AVURLAsset*urlSet=[AVURLAssetassetWithURL:url];
AVAssetImageGenerator*imageGenerator=[AVAssetImageGeneratorassetImageGeneratorWithAsset:urlSet];
imageGenerator.appliesPreferredTrackTransform=YES;//截图的时候调整到正确的方向
NSError*error=nil;
CMTimetime=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)
CMTimeactucalTime;//缩略图实际生成的时间
CGImageRefcgImage=[imageGeneratorcopyCGImageAtTime:timeactualTime:&actucalTimeerror:&error];
if(error){
Plog(@"截取视频图片失败:%@",error.localizedDescription);
}
CMTimeShow(actucalTime);
UIImage*image=[UIImageimageWithCGImage:cgImage];

CGImageRelease(cgImage);
if(image){
Plog(@"视频截取成功");
}else{
Plog(@"视频截取失败");
}


self.takeImage=image;//[UIImageimageWithCGImage:cgImage];

[[NSFileManagerdefaultManager]removeItemAtURL:urlerror:nil];

if(!self.takeImageView){
self.takeImageView=[[UIImageViewalloc]initWithFrame:self.view.frame];
[self.bgViewaddSubview:self.takeImageView];
}
self.takeImageView.hidden=NO;
self.takeImageView.image=self.takeImage;
}

#pragmamark-通知

//注册通知
-(void)setupObservers
{
NSNotificationCenter*notification=[NSNotificationCenterdefaultCenter];
[notificationaddObserver:selfselector:@selector(applicationDidEnterBackground:)name:UIApplicationWillResignActiveNotificationobject:[UIApplicationsharedApplication]];
}

//进入后台就退出视频录制
-(void)applicationDidEnterBackground:(NSNotification*)notification{
[selfonCancelAction: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
[selfchangeDeviceProperty:^(AVCaptureDevice*captureDevice){
captureDevice.subjectAreaChangeMonitoringEnabled=YES;
}];
NSNotificationCenter*notificationCenter=[NSNotificationCenterdefaultCenter];
//捕获区域发生改变
[notificationCenteraddObserver:selfselector:@selector(areaChange:)name:AVCaptureDeviceSubjectAreaDidChangeNotificationobject:captureDevice];
}
-(void)removeNotificationFromCaptureDevice:(AVCaptureDevice*)captureDevice{
NSNotificationCenter*notificationCenter=[NSNotificationCenterdefaultCenter];
[notificationCenterremoveObserver:selfname:AVCaptureDeviceSubjectAreaDidChangeNotificationobject:captureDevice];
}
/**
*移除所有通知
*/
-(void)removeNotification{
NSNotificationCenter*notificationCenter=[NSNotificationCenterdefaultCenter];
[notificationCenterremoveObserver:self];
}

-(void)addNotificationToCaptureSession:(AVCaptureSession*)captureSession{
NSNotificationCenter*notificationCenter=[NSNotificationCenterdefaultCenter];
//会话出错
[notificationCenteraddObserver:selfselector:@selector(sessionRuntimeError:)name:AVCaptureSessionRuntimeErrorNotificationobject:captureSession];
}

/**
*设备连接成功
*
*@paramnotification通知对象
*/
-(void)deviceConnected:(NSNotification*)notification{
NSLog(@"设备已连接...");
}
/**
*设备连接断开
*
*@paramnotification通知对象
*/
-(void)deviceDisconnected:(NSNotification*)notification{
NSLog(@"设备已断开.");
}
/**
*捕获区域改变
*
*@paramnotification通知对象
*/
-(void)areaChange:(NSNotification*)notification{
NSLog(@"捕获区域改变...");
}

/**
*会话出错
*
*@paramnotification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
*
*@paramposition摄像头位置
*
*@return摄像头设备
*/
-(AVCaptureDevice*)getCameraDeviceWithPosition:(AVCaptureDevicePosition)position{
NSArray*cameras=[AVCaptureDevicedevicesWithMediaType:AVMediaTypeVideo];
for(AVCaptureDevice*cameraincameras){
if([cameraposition]==position){
returncamera;
}
}
returnnil;
}

/**
*改变设备属性的统一操作方法
*
*@parampropertyChange属性改变操作
*/
-(void)changeDeviceProperty:(PropertyChangeBlock)propertyChange{
AVCaptureDevice*captureDevice=[self.captureDeviceInputdevice];
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([captureDevicelockForConfiguration:&error]){
//自动白平衡
if([captureDeviceisWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance]){
[captureDevicesetWhiteBalanceMode:AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance];
}
//自动根据环境条件开启闪光灯
if([captureDeviceisFlashModeSupported:AVCaptureFlashModeAuto]){
[captureDevicesetFlashMode:AVCaptureFlashModeAuto];
}

propertyChange(captureDevice);
[captureDeviceunlockForConfiguration];
}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
*
*@paramflashMode闪光灯模式
*/
-(void)setFlashMode:(AVCaptureFlashMode)flashMode{
[selfchangeDeviceProperty:^(AVCaptureDevice*captureDevice){
if([captureDeviceisFlashModeSupported:flashMode]){
[captureDevicesetFlashMode:flashMode];
}
}];
}
/**
*设置聚焦模式
*
*@paramfocusMode聚焦模式
*/
-(void)setFocusMode:(AVCaptureFocusMode)focusMode{
[selfchangeDeviceProperty:^(AVCaptureDevice*captureDevice){
if([captureDeviceisFocusModeSupported:focusMode]){
[captureDevicesetFocusMode:focusMode];
}
}];
}
/**
*设置曝光模式
*
*@paramexposureMode曝光模式
*/
-(void)setExposureMode:(AVCaptureExposureMode)exposureMode{
[selfchangeDeviceProperty:^(AVCaptureDevice*captureDevice){
if([captureDeviceisExposureModeSupported:exposureMode]){
[captureDevicesetExposureMode:exposureMode];
}
}];
}
/**
*设置聚焦点
*
*@parampoint聚焦点
*/
-(void)focusWithMode:(AVCaptureFocusMode)focusModeexposureMode:(AVCaptureExposureMode)exposureModeatPoint:(CGPoint)point{
[selfchangeDeviceProperty:^(AVCaptureDevice*captureDevice){
//if([captureDeviceisFocusPointOfInterestSupported]){
//[captureDevicesetFocusPointOfInterest:point];
//}
//if([captureDeviceisExposurePointOfInterestSupported]){
//[captureDevicesetExposurePointOfInterest:point];
//}
if([captureDeviceisExposureModeSupported:exposureMode]){
[captureDevicesetExposureMode:exposureMode];
}
if([captureDeviceisFocusModeSupported:focusMode]){
[captureDevicesetFocusMode:focusMode];
}
}];
}

/**
*添加点按手势，点按时聚焦
*/
-(void)addGenstureRecognizer{
UITapGestureRecognizer*tapGesture=[[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(tapScreen:)];
[self.bgViewaddGestureRecognizer:tapGesture];
}

-(void)tapScreen:(UITapGestureRecognizer*)tapGesture{
if([self.sessionisRunning]){
CGPointpoint=[tapGesturelocationInView:self.bgView];
//将UI坐标转化为摄像头坐标
CGPointcameraPoint=[self.previewLayercaptureDevicePointOfInterestForPoint:point];
[selfsetFocusCursorWithPoint:point];
[selffocusWithMode:AVCaptureFocusModeContinuousAutoFocusexposureMode:AVCaptureExposureModeContinuousAutoExposureatPoint:cameraPoint];
}
}

/**
*设置聚焦光标位置
*
*@parampoint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;
[UIViewanimateWithDuration:0.5animations:^{
self.focusCursor.transform=CGAffineTransformIdentity;
}completion:^(BOOLfinished){
[selfperformSelector:@selector(onHiddenFocusCurSorAction)withObject:nilafterDelay: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.progressViewclearProgress];
}
self.afreshCenterX.constant=-(SCREEN_WIDTH/2/2);
self.ensureCenterX.constant=SCREEN_WIDTH/2/2;
[UIViewanimateWithDuration:0.25animations:^{
[self.viewlayoutIfNeeded];
}];

self.lastBackgroundTaskIdentifier=self.backgroundTaskIdentifier;
self.backgroundTaskIdentifier=UIBackgroundTaskInvalid;
[self.sessionstopRunning];
}


//重新拍摄时调用
-(void)recoverLayout{
if(self.isVideo){
self.isVideo=NO;
[self.playerstopPlayer];
self.player.hidden=YES;
}
[self.sessionstartRunning];

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;
[UIViewanimateWithDuration:0.25animations:^{
[self.viewlayoutIfNeeded];
}];
}

/*
#pragmamark-Navigation

//Inastoryboard-basedapplication,youwilloftenwanttodoalittlepreparationbeforenavigation
-(void)prepareForSegue:(UIStoryboardSegue*)seguesender:(id)sender{
//Getthenewviewcontrollerusing[seguedestinationViewController].
//Passtheselectedobjecttothenewviewcontroller.
}
*/

@end

使用也挺简单：

-(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=[[NSBundlemainBundle]loadNibNamed:@"HVideoViewController"owner:niloptions:nil].lastObject;
ctrl.HSeconds=30;//设置可录制最长时间
ctrl.takeBlock=^(iditem){
if([itemisKindOfClass:[NSURLclass]]){
NSURL*videoURL=item;
//视频url

}else{
//图片

}
};
[selfpresentViewController:ctrlanimated:YEScompletion:nil];
}

demo地址也给出来吧：不喜勿碰-_-\

KJCamera

自此就结束啦，写的比较简单，希望能帮助到大家，谢谢！

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

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