[绍棠] IOS 获取设备本地音视频, 即相册视频, 音频

来源：互联网发布：手持数据终端i6200s 编辑：程序博客网时间：2024/05/19 00:13

1、检索音视频

PHFetchOptions *allPhotosOptions;@property (nonatomic, strong) PHFetchResult *assetsFetchResults;if (allPhotosOptions == nil) {                allPhotosOptions = [[PHFetchOptions alloc] init];        allPhotosOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];    } self.assetsFetchResults = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:allPhotosOptions];

其中assetsFetchResults存储了所有的图片信息，PHAssetMediaTypeImage为搜索图片的类型，同样的搜索其他类的可以根据

typedef NS_ENUM(NSInteger, PHAssetMediaType) {    PHAssetMediaTypeUnknown = 0,    PHAssetMediaTypeImage   = 1,    PHAssetMediaTypeVideo   = 2,    PHAssetMediaTypeAudio   = 3,} NS_ENUM_AVAILABLE_IOS(8_0);

2、获取图片UIImage

[[PHCachingImageManager defaultManager] requestImageForAsset:asset                                    targetSize:AssetGridThumbnailSize                                   contentMode:PHImageContentModeAspectFill                                       options:nil                                 resultHandler:^(UIImage *result, NSDictionary *info) {                                     // Set the cell‘s thumbnail image if it‘s still showing the same asset.                                     if ([cell.representedAssetIdentifier isEqualToString:asset.localIdentifier]) {                                         cell.thumbnailImage = result;                                     }                                 }];

asset为assetsFetchResults中的一个PHAsset，targetSize是获取图片的大小，这个根据你显示的方式设置，如果需要获取图片其他信息比如标题可以采用

[phAsset valueForKey:@"filename"];

3、播放视频

-(void)setVideoAsset:(PHAsset *)videoAsset{    _videoAsset = videoAsset;    [[PHImageManager defaultManager] requestPlayerItemForVideo:_videoAsset options:nil resultHandler:^(AVPlayerItem * _Nullable playerItem, NSDictionary * _Nullable info) {        self.currentItem = playerItem;        [self.player replaceCurrentItemWithPlayerItem:self.currentItem];        [self.currentItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];    }];}

0 0