IOS 獲取裝置本地音視訊
阿新 • • 發佈:2019-01-04
1、檢索音視訊
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儲存了所有的圖片資訊,PHAssetMediaTypeImage為搜尋圖片的型別,同樣的搜尋其他類的可以根據
typedef NS_ENUM(NSInteger, PHAssetMediaType) {
PHAssetMediaTypeUnknown = 0,
PHAssetMediaTypeImage = 1,
PHAssetMediaTypeVideo = 2,
PHAssetMediaTypeAudio = 3,
} NS_ENUM_AVAILABLE_IOS(8_0);
2、獲取圖片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為assetsFetchResults中的一個PHAsset,targetSize是獲取圖片的大小,這個根據你顯示的方式設定,如果需要獲取圖片其他資訊比如標題可以採用[phAsset valueForKey:@"filename"];
3、播放視訊
-(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]; }]; }