iOS-按下UIButton时更改UIImageView的图像

Question

So I am developing my first app in iOS and I don't know how to fix this. In the same view I have: - two buttons inside a stackView (that I modified) - an UIImageView Storyboard View

Depending on which button I press, I want the image to change in UIImageView . However, bc the buttons are in the stackView , I can't push an IBAction from them to the controller.

I changed the image based on the button inside the function didViewLoad() , but as I learned, that function is only called once, so when when I press the buttons in the app it has no more effect in the UIImageView .

This is my controller for this view Controller Code

And this is the beginning of the code for the subclass of the UIStackView UIStackView subclass

Answer 1

In your case, you also have the option of using Segmented Controller.

Place the segmented controller in your View Controller in the StoryBoard.

Make an outlet of the Segment Controller

@IBOutlet var segmentedController: UISegmentedControl!

Make an IBAction Function for Value Changed event in the Segmented Control. Now whenever the selected tabs are changed you will be notified.

@IBAction func SegmentTapped(_ sender: Any) {
    switch segmentedController.selectedSegmentIndex {
    case 0:
        // Change Image Here
    case 1:
        // Change other image here
    default:
        // Statement to execute if no other case is present
    }
}

Answer 2

Using Segmented Controller would be a good idea for this case. Thank you for that.

For the more general approach of how to make things happen with what I had already written, this post ( Open a storyboard view with a stackview button in Swift 3 and Xcode ) was very useful and also taught me how to properly use protocols and delegates.