• 使用原生相機(jī) UIImagePickerController 來(lái)錄制

一刻诊、準(zhǔn)備
1.添加依賴庫(kù)AVFoundation.framework

2.導(dǎo)入頭文件
<AVFoundation/AVFoundation.h>#import <MobileCoreServices/MobileCoreServices.h>

3.添加成員變量：

{
    //視頻錄制
    UIImagePickerController *_picker;
    //拍攝視頻資源控制符
    NSURL *_movieUrl;
    //保存到本地資源控制符
    NSURL *_locoaUrl;
    //視頻播放
    AVPlayer *player;
}

4.設(shè)置權(quán)限

麥克風(fēng)權(quán)限：Privacy - Microphone Usage Description 是否允許此App使用你的麥克風(fēng)
相機(jī)權(quán)限： Privacy - Camera Usage Description 是否允許此App使用你的相機(jī)？
相冊(cè)權(quán)限： Privacy - Photo Library Usage Description 是否允許此App訪問(wèn)你的媒體資料庫(kù)洛勉？
通訊錄權(quán)限：
Privacy - Contacts Usage Description 是否允許此App訪問(wèn)你的通訊錄邻邮？

藍(lán)牙權(quán)限：Privacy - Bluetooth Peripheral Usage Description 是否許允此App使用藍(lán)牙？
語(yǔ)音轉(zhuǎn)文字權(quán)限：Privacy - Speech Recognition Usage Description 是否允許此App使用語(yǔ)音識(shí)別？
日歷權(quán)限：Privacy - Calendars Usage Description 是否允許此App使用日歷征绎？
定位權(quán)限：Privacy - Location When In Use Usage Description 我們需要通過(guò)您的地理位置信息獲取您周邊的相關(guān)數(shù)據(jù)
后臺(tái)定位權(quán)限: Privacy - Location Always Usage Description 我們需要通過(guò)您的地理位置信息獲取您周邊的相關(guān)數(shù)據(jù)定位的需要這么寫，防止上架被拒磨取。

二人柿、代碼：

/**
** 
****點(diǎn)擊按鈕開始錄制
** @param sender <#sender description#> */
- (IBAction)startPicker:(id)sender {
//初始化 UIImagePickerController
    _picker = [[UIImagePickerController alloc]init];    
    _picker.delegate = self;
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
//來(lái)源為攝像頭
        _picker.sourceType = UIImagePickerControllerSourceTypeCamera;
// 重點(diǎn) 是設(shè)置媒體類型為視頻 電影 類型為數(shù)組
        _picker.mediaTypes = @[(NSString*)kUTTypeMovie];
//設(shè)置為錄制模式
        _picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
//下面為默認(rèn)設(shè)置
//錄制時(shí)間
        _picker.videoMaximumDuration = 10;
//質(zhì)量
        _picker.videoQuality = UIImagePickerControllerQualityTypeIFrame960x540;
//顯示攝像頭控制面板 設(shè)置為NO 使用cameraOverlayView 自定義界面
        _picker.showsCameraControls = YES;
// picker.cameraOverlayView 攝像頭上覆蓋的視圖，可用通過(guò)這個(gè)視頻來(lái)自定義拍照或錄像界面
//攝像頭  前置/后置
        _picker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
//閃光燈模式 自動(dòng)
        _picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
    }
    [self presentViewController:_picker animated:YES completion:nil];    
}

#pragma mark UIImagePickerControllerDelegate  代理方法（在代理方法中處理視頻）
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
       [picker dismissViewControllerAnimated:YES completion:nil];
       NSString *mediaType =  [info objectForKey:UIImagePickerControllerMediaType];
       if ([mediaType isEqualToString:@"public.image"]) {
        //如果媒體類型為圖片
        //相機(jī)：裁剪后的圖片//
        UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
        //原始圖片
        UIImage *image2 = [info objectForKey:UIImagePickerControllerOriginalImage];
           }else if (
              [mediaType isEqualToString:@"public.movie"]){//如果媒體類型為視頻
               _movieUrl = [info objectForKey:UIImagePickerControllerMediaURL];
//獲取視頻資源定位
               //將視頻保存到本地
            NSData *fileData = [NSData dataWithContentsOfURL:_movieUrl];
            NSString *path = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).firstObject;
            path = [path stringByAppendingPathComponent:@"save.mp4"];
            NSFileManager *fileManager = [NSFileManager defaultManager];
            BOOL isSuccess = [fileManager createFileAtPath:path contents:fileData attributes:nil];
               if (isSuccess) {
            NSLog(@"保存到本地成功");
            //保存本地資源定位
            _locoaUrl = [NSURL URLWithString:path];
        } else {
            NSLog(@"保存到本地失敗");
        }    }
    NSLog(@"拍照忙厌，相片完成”);

        //將視頻保存到相冊(cè)
    UISaveVideoAtPathToSavedPhotosAlbum([_movieUrl path], self, @selector(video:didFinishSavingWithError:contextInfo:), nil);}

/* 實(shí)現(xiàn)錄制過(guò)程中點(diǎn)擊取消退出 @param picker <#picker description#> */
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

/** 視頻格式轉(zhuǎn)換（帶轉(zhuǎn)換功能額）
** @param sender <#sender description#> */
- (IBAction)formatConverter:(id)sender{
//轉(zhuǎn)換時(shí)文件不能已存在凫岖，否則出錯(cuò)
       AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:_movieUrl options:nil];
       NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
       //判斷是否包含該質(zhì)量的視頻
    if ([compatiblePresets containsObject:AVAssetExportPresetMediumQuality]) {
        AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality];
        //用時(shí)間給文件全名，以免重復(fù)逢净，在測(cè)試的時(shí)候其實(shí)可以判斷文件是否存在若存在哥放，則刪除，重新生成文件即可
        NSDateFormatter *formater = [[NSDateFormatter alloc] init];
        [formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"];
        NSString *resultPath = [NSHomeDirectory() stringByAppendingFormat:@"/Documents/output-%@.mp4", [formater stringFromDate:[NSDate date]]];
        exportSession.outputURL = [NSURL fileURLWithPath:resultPath];
        exportSession.outputFileType = AVFileTypeMPEG4;
        [exportSession exportAsynchronouslyWithCompletionHandler:^(void)         {
             switch (exportSession.status) {
                 case AVAssetExportSessionStatusUnknown:
                     NSLog(@"AVAssetExportSessionStatusUnknown");
                     break;
                 case AVAssetExportSessionStatusWaiting:
                     NSLog(@"AVAssetExportSessionStatusWaiting");
                     break;
                 case AVAssetExportSessionStatusExporting:
                     NSLog(@"AVAssetExportSessionStatusExporting");
                     break;
                 case AVAssetExportSessionStatusCompleted:
                     NSLog(@"AVAssetExportSessionStatusCompleted");
                 {
                     NSURL *fileUrl = [NSURL URLWithString:resultPath];
                     NSLog(@"轉(zhuǎn)換結(jié)束");
                     [self fileSizeAtPath:fileUrl];                     _endUrl = fileUrl;
                 }
                     break;
                 case AVAssetExportSessionStatusFailed:
                     NSLog(@"AVAssetExportSessionStatusFailed");
                     break;
             }
         }];
    }
}

三爹土、其他：

/** **計(jì)算文件大小** @param filePathUrl <#filePathUrl description#> @return 返回單位為Byte */
- (unsigned long long)fileSizeAtPath:(NSURL *)filePathUrl{
       NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL isExist = [fileManager fileExistsAtPath:[filePathUrl path]];
    if (isExist){
        unsigned long long fileSize = [[fileManager attributesOfItemAtPath:[filePathUrl path] error:nil] fileSize];
        NSLog(@"%@大小: %f M",[filePathUrl path],fileSize/1024.0/1024.0);
        return fileSize;
    } else {
        NSLog(@"file is not exist");
        return 0;
    }
}

/** **點(diǎn)擊播放本地視頻** @param sender <#sender description#> */
- (IBAction)playLocalMove:(id)sender {
       NSURL *movieUrl = [NSURL fileURLWithPath:[_locoaUrl path]];
    //直接調(diào)用_localUrl無(wú)法播放甥雕，不知道為什么
    player = [AVPlayer playerWithURL:movieUrl];
       //3、創(chuàng)建視頻顯示的圖層
    AVPlayerLayer *showVodioLayer = [AVPlayerLayer playerLayerWithPlayer:player];
    showVodioLayer.frame = self.view.frame;
    [self.view.layer addSublayer:showVodioLayer];
    //4着饥、播放視頻
    [player play];
}

/** **獲取相冊(cè)內(nèi)視頻的時(shí)長(zhǎng)** @param URL <#URL description#> @return <#return value description#> */
-(CGFloat)getVideoLength:(NSURL*)URL{
    NSDictionary*opts=[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO]                                                 forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
       AVURLAsset *urlAs = [AVURLAsset URLAssetWithURL:URL options:opts];
       CGFloat second= urlAs.duration.value/urlAs.duration.timescale;
       return second;
}

//**視頻保存后的回調(diào)**
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
       if (error) {
        NSLog(@"保存視頻過(guò)程中發(fā)生錯(cuò)誤犀农，錯(cuò)誤信息:%@",error.localizedDescription);
    }else{
        NSLog(@"視頻保存成功.");
    }
}

視頻質(zhì)量與大小的關(guān)系（以10s為例）

// UIImagePickerControllerQualityTypeHigh = 0, 高，18M
// UIImagePickerControllerQualityTypeMedium = 1 , 中等宰掉，0.95M
// UIImagePickerControllerQualityTypeLow = 2, 低呵哨，0.19M
// UIImagePickerControllerQualityType640x480 , 3.745M
// UIImagePickerControllerQualityTypeIFrame1280x720赁濒， 50M
// UIImagePickerControllerQualityTypeIFrame960x540， 35M

四孟害、UIImagePickerController常用屬性拒炎、方法

1.+(BOOL)isSourceTypeAvailable:(UIImagePickerControllerSourceType)sourceType;
// 檢查指定源是否在設(shè)備上可用。
// 檢查照片源是否可用
[UIImagePickerControlle isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]

2.allowsEditing
默認(rèn)NO,是否允許編輯允許編輯.

[imagePicker setAllowsEditing:YES]; 

3. videoMaximumDuration
設(shè)置UIImagePicker的最大視頻持續(xù)時(shí)間.默認(rèn)10分鐘

4. availableMediaTypesForSourceType:
//指定源可用的媒體種類
//獲得相機(jī)模式下支持的媒體類型

NSArray* availableMediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];

5. sourceType
設(shè)置UIImagePicker照片源類型挨务，默認(rèn)有3種击你。
照片源類型 UIImagePickerControllerSourceTypeCamera
照相機(jī) UIImagePickerControllerSourceTypePhotoLibrary
照片庫(kù)（通過(guò)同步存放的，用戶不能刪除) UIImagePickerControllerSourceTypeSavedPhotosAlbum
保存的照片（通過(guò)拍照或者截屏保存的谎柄，用戶可以刪除）