从网址下载数据时等待填写tableview

I am trying to get a table filled when after I downloaded information from a url.This data will fill in different labels and a image view in the table view which is nested in a view controller. I got the data from a local json file to parse out right and also fill in the labels with the right values. The problem is the table methods that fill the table get called before I can download the data from the url. Any help with this will be appreciated. thanksI am trying to get a table filled when after I