導(dǎo)入系統(tǒng)庫頭文件 ：

import <Photos/Photos.h>

1.獲取對應(yīng)名稱的相冊

/**
albumName：相冊名稱统刮，沒有則創(chuàng)建該相冊
*/
+ (PHAssetCollectionChangeRequest *)photoCollectionWithAlbumName:(NSString *)albumName {
    // 創(chuàng)建搜索集合
    PHFetchResult *result = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
    
    //遍歷相冊抄囚，獲取對應(yīng)相冊的changeRequest
    for (PHAssetCollection *assetCollection in result) {
        if ([assetCollection.localizedTitle containsString:albumName]) {
            PHAssetCollectionChangeRequest *collectionRuquest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:assetCollection];
            return collectionRuquest;
        }
    }
    
    //不存在滞详，創(chuàng)建albumName為名的相冊changeRequest
    PHAssetCollectionChangeRequest *collectionRequest = [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:albumName];
    return collectionRequest;
}

2.沙盒視頻寫入相冊

/**
videoURL：視頻的沙盒路徑
completionHandler：操作回調(diào)
*/
+ (void)lxj_writeVideoToAssetsLibrary:(NSURL *)videoURL completionHandler:(nullable void(^)(BOOL success, NSError *__nullable error))completionHandler{
    
    [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
        //請求創(chuàng)建一個(gè)Asset
        PHAssetChangeRequest *assetRequest = [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:videoURL];
        //視頻存儲的相冊
        PHAssetCollectionChangeRequest *collectonRequest = [PHPhotoLibrary photoCollectionWithAlbumName:@"相冊名"];
        //為Asset創(chuàng)建一個(gè)占位符，放到相冊編輯請求中
        PHObjectPlaceholder *placeHolder = [assetRequest placeholderForCreatedAsset];
        //相冊中添加視頻
        [collectonRequest addAssets:@[placeHolder]];
        
    } completionHandler:^(BOOL success, NSError *error) {
        if (completionHandler) {
            completionHandler(success,error);
        }
    }];
    
}