如何将addtarget设置为自定义UIView

Question

I have a custom UIView called Icons. Everything is working perfectly fine right now except one thing. The problem that i am having is being able to set userinteraction to be working or to either make the button i have in my class to be working. When I add a target to the button, i get an error that crashes everything and with the userinteraction to the view, i get no response.

class Icons: UIView {
    let xUnit = UIScreen.mainScreen().bounds.width/20
    let yUnit = UIScreen.mainScreen().bounds.height/30
    var name: String = String()
    var image: UIImage = UIImage()
    let font = UIFont(name: "HelveticaNeue-Thin", size: 16.0)!

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.userInteractionEnabled = true



    }

    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func addCustomView(name:String, image: UIImage ){
        let label: UILabel = UILabel()
        label.frame = CGRectMake(0, 1.5*xUnit, 3.4*xUnit, 2.7*xUnit)
        label.textAlignment = NSTextAlignment.Center
        label.font = font
        label.text = name
        self.addSubview(label)

        let btn: UIButton = UIButton()
        btn.frame=CGRectMake(0.3*xUnit, 0, 2.5*xUnit, 2.5*xUnit)
        btn.setImage(image, forState: .Normal)
        self.addSubview(btn)


    }
}

And this is the class I'm trying to get connect it with which is in a completely different class

func tapSettings(tapGestureRecognizer: UITapGestureRecognizer){
    let touchPoint = tapGestureRecognizer.locationInView(self.view)
    if(CGRectContainsPoint(settings.frame, touchPoint)){
        print("hi")
    }
}

when I am trying to connect it to the button I say this:

btn.addTarget(self,action: #selector(HomeScreen.tapSettings))

and when I try and connect it to the view I say this :

let settingsTouch = UITapGestureRecognizer(target: self, action: #selector(HomeScreen.tapSettings))
        settingsTouch.numberOfTapsRequired = 1
        settingsTouch.numberOfTouchesRequired = 1
        self.view.addGestureRecognizer(settingsTouch)

Answer 1

try this

    btn.addTarget(HomeScreen.self, action: #selector(HomeScreen.tapSettings(_:)), forControlEvents: UIControlEvents.TouchUpInside)

I hope this helps

Answer 2

There are two problems in your code:

1. You are setting the target of the button to self when you should be setting it to an instance of HomeScreen, if that's where the method you want to call is declared

2. The argument a button action method receives is not UITapGestureRecognizer , but the clicked button instead, so you should replace your tapSettings method with something like this:

   func tapSettings(button: UIButton){