iOS PhotoKit获取所有相册名称

￡神魔★判官ぃ 2022-07-13 13:40 148阅读 0赞

//由于此方法为同步方法 所以需要放在子线程中去执行 例如:
        dispatch_async(dispatch_get_global_queue(0, 0), ^{
            NSMutableArray *arr = [self getAllPhoto];
            NSLog(@"完成%@ \n照片总数%ld", arr, arr.count);
        });下面是函数
     - (NSMutableArray *)getAllPhoto{
        NSMutableArray *arr = [NSMutableArray array];
        // 所有智能相册
        PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
        for (NSInteger i = 0; i < smartAlbums.count; i++) {
            PHCollection *collection = smartAlbums[i];
            //遍历获取相册
            if ([collection isKindOfClass:[PHAssetCollection class]]) {
                PHAssetCollection *assetCollection = (PHAssetCollection *)collection;
                PHFetchResult *fetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:nil];
                PHAsset *asset = nil;
                if (fetchResult.count != 0) {
                    for (NSInteger j = 0; j < fetchResult.count; j++) {
                        //从相册中取出照片
                        asset = fetchResult[j];
                        PHImageRequestOptions *opt = [[PHImageRequestOptions alloc]init];
                        opt.synchronous = YES;
                        PHImageManager *imageManager = [[PHImageManager alloc] init];
                        [imageManager requestImageForAsset:asset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeAspectFill options:opt resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
                            if (result) {
                                [arr addObject:result];
                            }
                        }];
                    }
                }
            }
        }
        
        //返回所有照片
        return arr;
    }