save photo on iOS using Photos Framework

save to photos

PHObjectPlaceholder *placeholderAsset;
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
    PHAssetChangeRequest *newAssetRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:<#image#>];
    newAssetRequest.creationDate = <#time#>;
    newAssetRequest.location = <#location#>;

    placeholderAsset = newAssetRequest.placeholderForCreatedAsset;

    PHAssetCollectionChangeRequest *addAssetRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:<#asset collection#>];
    [addAssetRequest addAssets:@[placeholderAsset]];

} completionHandler:^(BOOL success, NSError *error) {
    if (!error) {
        NSLog(@"Asset identifier: %@", placeholderAsset.localIdentifier);
    }
}];