iOS从相册获取以及用相机拍摄视频并缓存到沙盒

来源：互联网发布：浴缸尺寸知乎编辑：程序博客网时间：2024/05/22 17:37
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）
[objc] view plain copy
 print?
#import "DMSelectVideoViewController.h"  
#import "ZYQAssetPickerController.h"  
#import <AVFoundation/AVFoundation.h>  
#import <MediaPlayer/MediaPlayer.h>  
// 视频URL路径  
#define KVideoUrlPath   \  
[[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"VideoURL"]  
  
  
@interface DMSelectVideoViewController ()<UIActionSheetDelegate , ZYQAssetPickerControllerDelegate , UINavigationControllerDelegate ,UITextFieldDelegate , UIImagePickerControllerDelegate>  
@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<assets.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  
0 0