CODEWITHSUNDEEP
iosswiftuiviewuitouchhittest
Arbitur
Arbitur

Reputation: 39081

Hittest not working properly when view is not the size of the screen

Im trying to use hitTest inside a subclass of UIView to get which child Im hovering on.

class TestView:UIView {
    override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
        let point = touches.anyObject()!.locationInView(self)

        print(point)
        print("\t\t\t")
//        println(self.hitTest(point, withEvent: event))
        println(self.layer.hitTest(point))
    }

    override init(frame: CGRect) {
        super.init(frame: frame)

        self.backgroundColor = UIColor.redColor()

        let l1 = UILabel(text: "Hej 1")
        l1.frame.origin.y = 50
        l1.center.x = self.center.x

        let l2 = UILabel(text: "Hej 2")
        l2.frame.origin.y = 140
        l2.center.x = self.center.x

        self.addSubview(l1)
        self.addSubview(l2)
    }
    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
}

// In viewDidLoad()
let view = TestView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
view.center = self.view.center
//view.frame = self.view.bounds
self.view.addSubview(view)

If you would kindly paste this into xcode and try it you can see whats happening much better than I can explain, but I'll give it a try anyways.

Ok, when using the UIView hitTest It ONLY returns the TestView and never its children.

When using the CALayer hitTest it seems like the coordinate scheme is to the bottom right of the screen. (This is the part when its better to check for yourselves because I have no idea whats going on and its hard to describe).

But when I change view.frame = self.view.bounds it works like it should.

Upvotes: 0

Views: 1952

Answers (1)

rdelmar
rdelmar

Reputation: 104082

If you use the view's hitTest method, you need to set userInteractionEnabled to true for your labels to register a hit.

println(self.hitTest(point, withEvent:nil)!) // this works if you enable interaction on the labels

I'm not sure what's going on with the layer method; I've never worked with that before.

Upvotes: 1

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