Interface Builder：无法将自定义类分配给表视图控制器

Question

I am trying to create a simple app for iOS that uses a tab bar controller to present either a map view or a table view. Both the map view and the table view have the same navigation bar button items:

A Logout button on the left, and Refresh, Add New buttons on the right side of the navigation bar. So I have started experimenting the idea of having a parent controller called LocationViewController , which inherits from the UIViewController .

For the table view, I have a controller called TableViewController: LocationViewController , and another controller called MapViewController: LocationViewController .

On the storyboard, I added a set of two buttons (for refresh and add new) to the top header section of each view (very small, may be hard to see). See the image attached below:

There is no problem for me to assign the custom view controller MapViewController to my map view panel, but I cannot find the custom controller class TableViewController in the panel (see the below screenshot)

I found a similar post on stackoverflow, and a reboot solved that problem, which I also tried, but did not solve my problem at all.

Answer 1

You have added youe buttons in the wrong place. I do not know the right name for the bar, but it contains "associated objects". What you want to achieve should look something like this : Unfortunatelly, you cannot add two UIBarButtonItems to one side of navigation bar via interface builder. You can either drag a UIView instead of UIBarButtonItem to that "slot" and add two UIButtons there, or you ca add multiple buttons from code.

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Also, it seems that the name of your question is a bit misleading :) After carefull reread of your post I found the "right" question.

Answer - you have added a UITableViewController in your storyboard, but your class doesn't inherit from UITableViewController . If you want to keep the base class, you will have to make it a "plain" UIViewController and add a UITableView to it. Note, that this way you won't be able to have prototype cells.

Answer 2

You may need to subclass it from UITableViewController. Replace the UIViewController parent class for UITableViewController, like this:

class ViewController: UITableViewController {

Then make sure you selected the View Controller where blue color is all around it and then you can place the name of the class that inherits from UITableViewController.