{"action":"opened","issue":{"url":"https://api.github.com/repos/Yelp/YLTableView/issues/12","labels_url":"https://api.github.com/repos/Yelp/YLTableView/issues/12/labels{/name}","comments_url":"https://api.github.com/repos/Yelp/YLTableView/issues/12/comments","events_url":"https://api.github.com/repos/Yelp/YLTableView/issues/12/events","html_url":"https://github.com/Yelp/YLTableView/issues/12","id":124991148,"number":12,"title":"childViewController does not support UITableViewController","user":{"login":"NikoTung","id":1066764,"avatar_url":"https://avatars.githubusercontent.com/u/1066764?v=3","gravatar_id":"","url":"https://api.github.com/users/NikoTung","html_url":"https://github.com/NikoTung","followers_url":"https://api.github.com/users/NikoTung/followers","following_url":"https://api.github.com/users/NikoTung/following{/other_user}","gists_url":"https://api.github.com/users/NikoTung/gists{/gist_id}","starred_url":"https://api.github.com/users/NikoTung/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/NikoTung/subscriptions","organizations_url":"https://api.github.com/users/NikoTung/orgs","repos_url":"https://api.github.com/users/NikoTung/repos","events_url":"https://api.github.com/users/NikoTung/events{/privacy}","received_events_url":"https://api.github.com/users/NikoTung/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-01-05T15:41:21Z","updated_at":"2016-01-05T15:41:21Z","closed_at":null,"body":"It seem that if the `childViewController` is kind of UITableViewController then the height of cell is wrong .And Xcode will output the following log\r\n\r\n    Warning once only: Detected a case where constraints ambiguously suggest a height of zero for a tableview cell's content view. We're considering the collapse unintentional and using standard height instead.\r\n\r\nConstraints of `childViewController ` can't not get the height,because the childViewController's height is determined by the tableView which is determined by the content size .\r\n"}}