tabelview重新整理不能及時問題

執行緒：This application is modifying the autolayout engin from a background thread

    This application is modifying the autolayout engin from a background thread,which can lead to engine corruption and weird crashes,This will cause an exception in a future rellease   
    避開了主線開闢了一個執行緒去讀取資料，拿到資料後直接去更新資料，而不是程式碼回到主執行緒中去更新資料

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在處理資料的地方需要呼叫主執行緒
dispatch_async(dispatch_get_main_queue(), ^{
});