Is it possible to connect delegate and dataSource of CustomViews in interface builder?

Question

In Interface builder, If I right click on a tableView, I get option of delegate and dataSource outlets which at times we connect to the file's owner which is in most cases the View Controller which implements these protocol,

How can I get a similar option for my custom view which has a delegate and a datasource property ?

Answer 1

You'll need to meet these conditions:

1. The view's Custom Class should be set to your custom view's class name in Interface Builder (via the Identity Inspector). If your delegate or dataSource object is also a custom view, also make sure that that view's Custom Class is set
2. The @interface for your custom class should decorate its delegate and dataSource properties with IBOutlet. For example, @property (nonatomic, weak) IBOutlet id <SomeProtocol> delegate;
3. If you declared protocol(s) for your delegate or dataSource, the target object that you want to use as the delegate or dataSource should be declared as implementing that protocol

Answer 2

Create your custom delegate,

@objc protocol CustomDelegate: class {
func itemSelected(_ success: Bool)
}

Create your custom class and property of your custom delegate (Make sure you add @IBOutlet during the property declaration),

class CustomView: UIView {
@IBOutlet weak var cDelegate: CustomDelegate!
//...
//...
//...
}

Now, Go to the Storyboard where you want to add this custom view, Take a UIView and change the class then right click on it, you will able to see the property ("cDelegate") you declared. See the picture for better understanding,