iPhone+后台执行选择器

Question

谁能帮我解决 performSelectorInBackground 问题？我想在 performSelectorInBackground 中使用更新后的数据重新加载表。

Answer 1

你可以做的就是在后台线程中获取数据，一旦获取到数据就可以返回主线程并在主线程中更新 TableView 。

- (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
}