问带视频的requestImageDataForAsset PHAsset返回imageData指向一张照片

EN

+ (void)getAssetData:(NSString *)ident completeBlock:(void (^)(NSData *assetData))completeBlock {
    PHFetchResult *fetchResult = [PHAsset fetchAssetsWithLocalIdentifiers:@[ident] options:nil];
    if (fetchResult && [fetchResult count] == 0) {
        if (completeBlock) {
            completeBlock(nil);
        }
        return;
    }

    PHAsset *asset = fetchResult.firstObject;
    if (asset.mediaType == PHAssetMediaTypeVideo) {
        [[PHImageManager defaultManager] requestAVAssetForVideo:asset options:nil resultHandler:^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {
            if ([asset isKindOfClass:[AVURLAsset class]]) {
                AVURLAsset* urlAsset = (AVURLAsset*)asset;
                NSNumber *size;
                [urlAsset.URL getResourceValue:&size forKey:NSURLFileSizeKey error:nil];
                NSData *data = [NSData dataWithContentsOfURL:urlAsset.URL];
                completeBlock(data);
            } else {
                completeBlock(nil);
            }
        }];
    } else {
        [[PHImageManager defaultManager] requestImageDataForAsset:fetchResult.firstObject options:nil resultHandler:^(NSData * _Nullable imageData, NSString * _Nullable dataUTI, UIImageOrientation orientation, NSDictionary * _Nullable info) {
            completeBlock(imageData);
        }];
    }
}