IPhone + performselector在後臺

Question

任何人都可以幫我performSelectorInBackground？我想用performSelectorInBackground中的更新數據重新載入表格。

Answer 1

你可以做的只是在後臺線程中獲取數據，一旦獲取數據並更新主線程中的tableview，就可以返回主線程。

- (UITableViewCell *)tableView:(UITableView *)tableView 
     cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    //All your views cell creations and other stuff 
    [self performSelectorInBackground:@selector(loadDataThatToBeFetchedInThread:) 
          withObject:objectArrayThatNeedToFetchData]; 
} 

- (void) loadDataThatToBeFetchedInThread:(NSArray *)objectThatNeedToFetchData 
{ 
    //Fetch the data here. which takes place in background thread 
    [self performSelectorOnMainThread:@selector(updateTableViewWithTheData:) 
          withObject:responseData 
         waitUntilDone:YES]; 
} 


- (void) updateTableViewWithTheData:(NSMutableArray *)yourData 
{ 
    //Update Data to tableview here 
} 

Answer 2

所有的UI功能都應該在主線程中完成。所以你必須在主線程中重新加載UITableView。