iOS - IBOutlet & IBAction

 

On a Interface builder, hold down the control button and drag & drop to your UIViewController. 

Then, you will see @IBOulet and @IBAction. 

When you name your IBAction, try to describe the fact that it was tapped or it pressed. 

ex: buttonPressed.

 

You can see InterfaceBuilder file on your left and Swift file on your right. 

 

Be sure to memorize the following two APIs as they are very useful when you build your apps.

 

Returns a random element of the collection.

 

Returns a random value within the specified range.

 

reference : https://www.udemy.com/course/ios-13-app-development-bootcamp/