iOS Question how I know album permission?

#If OBJC
#import <AssetsLibrary/AssetsLibrary.h>


-(void)savebitmap :(ALAssetsGroup*) albumhandle :(UIImage*) image
{

    CGImageRef img = [image CGImage];
    ALAssetsLibrary *library = [self defaultAssetsLibrary];

//  UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);


  [library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
    if (error) {
    [self.bi raiseEvent:nil event:@"savebitmap_result::"  params:@[@3,@"Error"]];

    } else {
   
   [self.bi raiseEvent:nil event:@"savebitmap_result::"  params:@[@1,@"Success"]];

    }
}];



}
#End If

Sub Button1_Click
    Private wrk_bmp As Bitmap
    wrk_bmp.Initialize(File.DirAssets, "nas1.png")
    Dim Returned_album_handle As String
    SaveBitmap(Returned_album_handle, wrk_bmp)
    Wait For SaveBitmap_Result(status As String)
    Log("MyALAssets_SaveBitmap_Result: " & status)
End Sub

Public Sub SaveBitmap(Album_handle As Object, Image As Bitmap)
    noMe.RunMethod("savebitmap::", Array(Album_handle, Image))
End Sub

Private Sub SaveBitmap_Result(Photo_handle As Int, Status As String)
    Log(Status)
    Log(Photo_handle)
End Sub