Custom Uibutton Class for Button Touch Event

Swift: Custom UIButton Class in View Controller Touch Event Not Trigger?

You may need a closure not a computed property

lazy var customBtn: CustomButton = {
    let frame = CGRect(x: 48.0, y: 177.0, width: 80.0, height: 40.0)
    let custom = CustomButton(frame: frame, title: "Test",alignment: NSTextAlignment.right)
    return custom
}()

Here inside MainViewController

customBtn.addTarget(self,
                        action: #selector(touchCancel),
                        for: .touchUpInside)

you add the target to a newly created instance not to the one you added as a subview and it's the main difference between your implementation ( computed property ) and closure

why is my custom UIButton subclass not triggering touch up IBAction?

ah ok, figured it out. in my custom button initializer I added a subview which, by default, had userInteractionEnabled set to true. setting userInteractionEnabled = true on my custom button object and userInteractionEnabled = false on my view before adding it as a subview allows my custom button to capture the touch and handle it properly rather than the view capturing the touch

Custom UIButton class with animation swift

You can do something like below, just replace the event which ever you are interested in.

class AnimatedButton: UIButton {

    override func awakeFromNib() {
        super.awakeFromNib()
        self.addTarget(self, action: #selector(AnimatedButton.buttonClicked(sender:)), for: .touchUpInside)
    }

    @objc private func buttonClicked(sender: UIButton) {
        sender.transform = CGAffineTransform(scaleX: 0.6, y: 0.6)
        // animation ...
    }
}

Subclassing UIButton and overriding touch events - not working

Instead of calling super in the completion block of touchesCancelled and touchesEnded methods I called self.sendActionsForControlEvents(UIControlEvents.TouchUpInside) in there.

Rounded Custom UIButton does not exhibit the touch effect

You could add Animation on the button touch event to achieve the effect as you need . For example , set the BackgroundColor gradient .

public class RoundButton : UIButton
{
    public override void LayoutSubviews()
    {
        base.LayoutSubviews();

        Layer.CornerRadius = Bounds.Height / 2;
    }

    public override void TouchesBegan(NSSet touches, UIEvent evt)
    {
        this.Highlighted = true;

        SetAnimation(UIColor.LightGray);

        base.TouchesBegan(touches, evt);
    }

    public override void TouchesEnded(NSSet touches, UIEvent evt)
    {
        this.Highlighted = false;

        SetAnimation(UIColor.Orange);

        base.TouchesEnded(touches, evt);
    }
    public override void TouchesCancelled(NSSet touches, UIEvent evt)
    {
        this.Highlighted = false;
        base.TouchesCancelled(touches, evt);
    }

    void SetAnimation(UIColor color)
    {
        UIView.BeginAnimations(null);
        UIView.SetAnimationDuration(1.0);
        UIView.SetAnimationTransition(UIViewAnimationTransition.None, this, false);

        this.Layer.BackgroundColor = color.CGColor;

        UIView.CommitAnimations();
    }

}

For more details about Animations in iOS you could check the doc .

Subclassing UIButton to handle clicks

I think there are better solutions to this problem than what you've proposed, but to answer your question directly: A subclass of UIButton observes touch events the same way that everyone else observes touch events.

// In your UIButton subclass

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super buttonWithType:UIButtonTypeCustom];
    if (self) {
        [self addTarget:self action:@selector(didTouchButton) forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}

- (void)didTouchButton {
    // do whatever you need to do here
}

Important note: you can't use [UIButton buttonWithType:] to create your button, you've got to use init or initWithFrame:. Even though UIButton has the convenience initializer, initWithFrame: is still the designated initializer.

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