iOS从相册获取以及用相机拍摄视频并缓存到沙盒

iOS从相册获取以及用相机拍摄视频并缓存到沙盒

Demo：http://download.csdn.net/detail/u012881779/9449227

从标题很容易发现，本文只是为了获取视频数据源，以便后面能方便完成视频上传等操作

需要导入AVFoundation.framework（获取数据源）， MediaPlayer.framework（播放视频）

 #import "DMSelectVideoViewController.h"
 #import "ZYQAssetPickerController.h"
 #import
 #import
 // 视频URL路径
 #define KVideoUrlPath   \
 [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"VideoURL"]


 @interface DMSelectVideoViewController ()
 @property (strong, nonatomic) NSMutableArray     *uploadDataArr;
 @property (weak, nonatomic) IBOutlet UITextView  *desTextView;
 @property (weak, nonatomic) IBOutlet UIImageView *imgView;
 @property (weak, nonatomic) IBOutlet UILabel     *titleLab;
 @property (weak, nonatomic) IBOutlet UILabel     *typeLab;
 @property (weak, nonatomic) IBOutlet UILabel     *timeLab;
 @property (strong, nonatomic) MPMoviePlayerViewController *moviePlayerView;

 @end

 @implementation DMSelectVideoViewController
 @synthesize uploadDataArr = _uploadDataArr;
 @synthesize moviePlayerView = _moviePlayerView;

 //播放视频
 - (IBAction)playVideoAction:(id)sender {
     if(_uploadDataArr){
         NSDictionary *lastObj = [_uploadDataArr lastObject];
         NSString *viPath = [lastObj objectForKey:@"path"];
         if(![viPath isEqualToString:@""]){
             NSURL *movieURL = [NSURL fileURLWithPath:viPath];
             [_moviePlayerView.view removeFromSuperview];
             _moviePlayerView = nil;
             _moviePlayerView =[[MPMoviePlayerViewController alloc] initWithContentURL:movieURL];
             [_moviePlayerView.moviePlayer prepareToPlay];
             [self.view addSubview:_moviePlayerView.view];

             _moviePlayerView.moviePlayer.shouldAutoplay=YES;
             [_moviePlayerView.moviePlayer setControlStyle:MPMovieControlStyleDefault];
             [_moviePlayerView.moviePlayer setFullscreen:YES];
             [_moviePlayerView.view setFrame:self.view.bounds];

             //播放完后的通知
             [[NSNotificationCenter defaultCenter] addObserver:self
                                                      selector:@selector(movieFinishedCallback:)
                                                          name:MPMoviePlayerPlaybackDidFinishNotification                                                      object:nil];
             //离开全屏时通知，因为默认点击Done是退出全屏，要离开播放器就要覆盖掉这个事件
             [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(exitFullScreen:) name: MPMoviePlayerDidExitFullscreenNotification object:nil];
         }
     }
 }

 //播放结束后离开播放器,点击上一曲、下一曲也是播放结束
 -(void)movieFinishedCallback:(NSNotification*)notify {
     MPMoviePlayerController* theMovie = [notify object];
     [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:theMovie];
     [theMovie.view removeFromSuperview];
 }

 -(void)exitFullScreen:(NSNotification *)notification{
     [_moviePlayerView.view removeFromSuperview];
 }



 //选择视频
 - (IBAction)ChioceVideoAction:(id)sender {
     [self.view endEditing:YES];

     UIActionSheet *actionSheet=[[UIActionSheet alloc] initWithTitle:nil
                                                            delegate:self
                                                   cancelButtonTitle:@"取消"
                                              destructiveButtonTitle:nil
                                                   otherButtonTitles:@"从相册选择",@"相机拍摄", nil nil];
     actionSheet.actionSheetStyle = UIActionSheetStyleBlackOpaque;
     [actionSheet showInView:self.view];
 }

 //投稿
 - (IBAction)IWantToContributeAction:(id)sender {
     [self.view endEditing:YES];
 }

 -(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

     switch (buttonIndex) {
         case 0:
             //从相册选择
             [self selectFromAlbumAction];
             break;

         case 1:
             //相机拍摄
             [self shootingWithCameraAction];
             break;

         default:
             break;
     }
 }

 #pragma mark 从相册选择
 //从相册选择
 -(void)selectFromAlbumAction{
     ZYQAssetPickerController *picker = [[ZYQAssetPickerController alloc] init];
     picker.maximumNumberOfSelection = 1;

     picker.assetsFilter = [ALAssetsFilter allVideos];
     picker.showEmptyGroups=NO;
     picker.delegate=self;

     picker.selectionFilter = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
         if ([[(ALAsset*)evaluatedObject valueForProperty:ALAssetPropertyType] isEqual:ALAssetTypeVideo]) {
             NSTimeInterval duration = [[(ALAsset*)evaluatedObject valueForProperty:ALAssetPropertyDuration] doubleValue];
             return duration <= 60;

         } else {
             return YES;
         }
     }];

     [self presentViewController:picker animated:YES completion:NULL];
 }

 #pragma mark - ZYQAssetPickerController Delegate
 -(void)assetPickerController:(ZYQAssetPickerController *)picker didFinishPickingAssets:(NSArray *)assets{

     if(!_uploadDataArr){
         _uploadDataArr = [[NSMutableArray alloc] init];
     }
     [_uploadDataArr removeAllObjects];
     //清空缓存中数据
     [self cleanCachesVideo];
     //清空UI上数据
     [self cleanOnUIData];

     for (int i=0; i.count; i++) {
         ALAsset *asset=assets[i];
         ALAssetRepresentation * representation = asset.defaultRepresentation;

         UIImage *tempImg = [UIImage imageWithCGImage:asset.thumbnail];
         NSData *data = UIImageJPEGRepresentation(tempImg, 1);
         NSString *reName = [self renameWithTimeSp:representation.filename];
         [self videoWithUrl:representation.url withFileName:reName];

         int seconds  =[[asset valueForProperty:ALAssetPropertyDuration] intValue];

         NSMutableDictionary *objDict = [[NSMutableDictionary alloc] init];
         if(data){
             [objDict setObject:data forKey:@"header"];
         }
         [objDict setObject:[NSString stringWithFormat:@"%@/%@",KVideoUrlPath,reName]  forKey:@"path"];
         [objDict setObject:[NSString stringWithFormat:@"%.2fM",(representation.size/1024.0)/1024.0] forKey:@"type"];
         [objDict setObject:reName  forKey:@"name"];

         [objDict setObject:[NSString stringWithFormat:@"%d",seconds]  forKey:@"time"];

         [_uploadDataArr addObject:objDict];
     }
 }

 // 将原始视频的URL转化为NSData数据,写入沙盒
 - (void)videoWithUrl:(NSURL *)url withFileName:(NSString *)fileName{

     NSFileManager * fileManager = [NSFileManager defaultManager];
     if (![fileManager fileExistsAtPath:KVideoUrlPath]) {
         [fileManager createDirectoryAtPath:KVideoUrlPath withIntermediateDirectories:YES attributes:nil error:nil];
     }
     ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc] init];
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
         if (url) {
             [assetLibrary assetForURL:url resultBlock:^(ALAsset *asset) {
                 ALAssetRepresentation *rep = [asset defaultRepresentation];
                 NSString * videoPath = [KVideoUrlPath stringByAppendingPathComponent:fileName];
                 const charchar *cvideoPath = [videoPath UTF8String];
                 FILEFILE *file = fopen(cvideoPath, "a+");
                 if (file) {
                     const int bufferSize = 111024 * 1024;
                     // 初始化一个1M的buffer
                     Byte *buffer = (Byte*)malloc(bufferSize);
                     NSUInteger read = 0, offset = 0, written = 0;
                     NSError* err = nil;
                     if (rep.size != 0)
                     {
                         do {
                             read = [rep getBytes:buffer fromOffset:offset length:bufferSize error:&err];
                             written = fwrite(buffer, sizeof(char), read, file);
                             offset += read;
                         } while (read != 0 && !err);
                     }
                     // 释放缓冲区，关闭文件
                     free(buffer);
                     buffer = NULL;
                     fclose(file);
                     file = NULL;

                     // UI的更新放在主线程
                     dispatch_async(dispatch_get_main_queue(), ^{
                         NSDictionary *firstDict = [_uploadDataArr firstObject];
                         if(firstDict){
                             _imgView.image = [UIImage imageWithData:[firstDict objectForKey:@"header"]];
                             _titleLab.text = [firstDict objectForKey:@"name"];
                             _typeLab.text = [firstDict objectForKey:@"type"];
                             NSString *timeStr = [firstDict objectForKey:@"time"];
                             if([timeStr intValue] > 0){
                                 _timeLab.text = [NSString stringWithFormat:@"%@S",timeStr];
                             }
                         }
                     });
                 }
             } failureBlock:nil];
         }
     });
 }

 //清空缓存中数据
 -(void)cleanCachesVideo{
     NSFileManager * fileManager = [NSFileManager defaultManager];
     if (![fileManager fileExistsAtPath:KVideoUrlPath]) {
         [fileManager createDirectoryAtPath:KVideoUrlPath withIntermediateDirectories:YES attributes:nil error:nil];
     }

     NSArray *contents = [fileManager contentsOfDirectoryAtPath:KVideoUrlPath error:NULL];
     NSEnumerator *e = [contents objectEnumerator];
     NSString *filename;
     while ((filename = [e nextObject])) {
           [fileManager removeItemAtPath:[KVideoUrlPath stringByAppendingPathComponent:filename] error:NULL];
     }
 }

 //用时间戳对文件命名 到毫秒
 -(NSString *)renameWithTimeSp:(NSString *)fileName{
     NSArray *spArr = [fileName componentsSeparatedByString:@"."];
     int hs = arc4random() % 100;
     NSDate *newDate = [NSDate date];
     long int timeSp = (long)[newDate timeIntervalSince1970];
     fileName = [NSString stringWithFormat:@"%ld%d.%@",timeSp,hs,[spArr lastObject]];
     return fileName;
 }

 //清空UI上数据
 -(void)cleanOnUIData{
     _imgView.image = nil;
     _titleLab.text = @"";
     _typeLab.text = @"";
     _timeLab.text = @"";
 }

 #pragma mark 相机拍摄
 //相机拍摄
 -(void)shootingWithCameraAction{
     UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
     ipc.sourceType = UIImagePickerControllerSourceTypeCamera;//sourcetype有三种分别是camera，photoLibrary和photoAlbum
     NSArray *availableMedia = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];//Camera所支持的Media格式都有哪些,共有两个分别是@"public.image",@"public.movie"
     ipc.mediaTypes = [NSArray arrayWithObject:availableMedia[1]];//设置媒体类型为public.movie
     [self presentViewController:ipc animated:YES completion:nil];
     ipc.videoMaximumDuration = 60.0f;//60秒
     ipc.delegate = self;//设置委托

 }

 //选择完成后响应
 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
     NSString*sourceURL = [info objectForKey:UIImagePickerControllerMediaURL];
     NSLog(@"%@",sourceURL);
     NSFileManager * fileManager = [NSFileManager defaultManager];
     if (![fileManager fileExistsAtPath:KVideoUrlPath]) {
         [fileManager createDirectoryAtPath:KVideoUrlPath withIntermediateDirectories:YES attributes:nil error:nil];
     }
     //视频长度
     float videoLengthTime = [self getVideoLength:(NSURL *)sourceURL];
     //视频缩略图
     UIImage *videoImgtemp = [self getImage:(NSURL *)sourceURL];

     NSData *createData = [NSData dataWithContentsOfFile:sourceURL];
     if(createData){
         //清空缓存中数据
         [self cleanCachesVideo];
         //清空UI上数据
         [self cleanOnUIData];

         NSString *lastName = @"capturedvideo.MOV";
         NSString *kvideoPath = [NSString stringWithFormat:@"%@/%@",KVideoUrlPath,[self renameWithTimeSp:lastName]];
         BOOL result = [fileManager createFileAtPath:kvideoPath contents:createData attributes:nil];
         if(result){
             NSString *paiPath = [NSString stringWithFormat:@"%@/tmp", NSHomeDirectory()] ;

             NSArray *contents = [fileManager contentsOfDirectoryAtPath:paiPath error:NULL];
             NSEnumerator *e = [contents objectEnumerator];
             NSString *filename;
             while ((filename = [e nextObject])) {
                 [fileManager removeItemAtPath:[paiPath stringByAppendingPathComponent:filename] error:NULL];
             }
         }
         if (![kvideoPath isEqualToString:@""]) {
             if(!_uploadDataArr){
                 _uploadDataArr = [[NSMutableArray alloc] init];
             }
             [_uploadDataArr removeAllObjects];

             AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:[NSURL URLWithString:kvideoPath] options:nil];
             NSString *addname = [[kvideoPath componentsSeparatedByString:@"/"] lastObject];
             NSMutableDictionary *objDict = [[NSMutableDictionary alloc] init];
             NSData *data = UIImageJPEGRepresentation(videoImgtemp, 1);
             if(data){
                 [objDict setObject:data forKey:@"header"];
             }
             [objDict setObject:kvideoPath  forKey:@"path"];
             [objDict setObject:[NSString stringWithFormat:@"%.2fM",[self getFileSize:kvideoPath]] forKey:@"type"];
             [objDict setObject:addname forKey:@"name"];
             [objDict setObject:[NSString stringWithFormat:@"%.f",videoLengthTime]  forKey:@"time"];

             [_uploadDataArr addObject:objDict];

             // UI的更新放在主线程
             dispatch_async(dispatch_get_main_queue(), ^{
                 NSDictionary *firstDict = [_uploadDataArr firstObject];
                 if(firstDict){
                     _imgView.image = [UIImage imageWithData:[firstDict objectForKey:@"header"]];
                     _titleLab.text = [firstDict objectForKey:@"name"];
                     _typeLab.text = [firstDict objectForKey:@"type"];
                     NSString *timeStr = [firstDict objectForKey:@"time"];
                     if([timeStr intValue] > 0){
                         _timeLab.text = [NSString stringWithFormat:@"%@S",timeStr];
                     }
                 }
             });
         }
     }

     [self dismissViewControllerAnimated:YES completion:nil];
 }

 //获取视频文件的大小，返回的是单位是M。
 - (CGFloat)getFileSize:(NSString *)path{
     NSFileManager *fileManager = [[NSFileManager alloc] init];
     float filesize = -1.0;
     if ([fileManager fileExistsAtPath:path]) {
         NSDictionary *fileDic = [fileManager attributesOfItemAtPath:path error:nil];//获取文件的属性
         unsigned long long size = [[fileDic objectForKey:NSFileSize] longLongValue];
         filesize = (1.0*size/1024)/1024.0;

     }
     return filesize;
 }

 //获取视频文件的时长。
 - (CGFloat)getVideoLength:(NSURL *)URL{
     NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO]
                                                      forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
     AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:URL options:opts];
     float second = 0;
     second = urlAsset.duration.value/urlAsset.duration.timescale;
     return second;

 }

 //获取本地视频缩略图，网上说需要添加AVFoundation.framework
 - (UIImage *)getImage:(NSURL *)URL{

     AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:URL options:nil];
     AVAssetImageGenerator *gen = [[AVAssetImageGenerator alloc] initWithAsset:asset];
     gen.appliesPreferredTrackTransform = YES;
     CMTime time = CMTimeMakeWithSeconds(0.0, 600);
     NSError *error = nil;
     CMTime actualTime;
     CGImageRef image = [gen copyCGImageAtTime:time actualTime:&actualTime error:&error];
     UIImage *thumb = [[UIImage alloc] initWithCGImage:image];
     CGImageRelease(image);

     return thumb;
 }

 @end