- (IBAction)dbSizeButton:(id)sender {

    dispatch_queue_t getDbSize = dispatch_queue_create("getDbSize", NULL);
    dispatch_queue_t main = dispatch_get_main_queue();
    dispatch_async(getDbSize, ^(void)
    {
        dispatch_async(main, ^{ 
            [_dbsizeLable setText:[dbmanager getDbSize]];
        });
    });

    // release
}  

By admin-powenko

Dr. Powen Ko is a teacher and CEO on LoopTek LLC, and like to teaching. if you need to class, please let PowenKo know, he will love to service and sharing. LoopTek web site is www.looptek.com

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