Failed to connect (storyboard) outlet from (NSApplication) to (NSNibExternalObjectPlaceholder) error in Cocoa and storyboard

Question

I\'ve tried to build a sample Cocoa app on which I want to connect UI components put on storyboard to ViewController.swift as either an IBOutlet or

Answer 1

I think I figured out the right solution.

1) Drag an Object into you xib interface.

2) Click the Object in the left list you just dragged in.

3) Bind the Object to your custom class.(Here my class is a login window controller as example)

4) Ctrl drag button to the source code. In the popup window, choose your class name(here in example is Login Window Controller) rather than File's Owner.

Hope this could help you.