tabelview重新整理不能及時問題

線程：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   
    避開了主線開辟了一個線程去讀取資料，拿到資料後直接去更新資料，而不是代碼回到主線程中去更新資料
           

在處理資料的地方需要調用主線程

dispatch_async(dispatch_get_main_queue(), ^{

});