CODEWITHSUNDEEP
iosswiftanimation
user2507194
user2507194

Reputation: 185

IOS show the label or image position during animation

I am trying to use 

UIView.animateWithDuration()

to change the position of a label or an image. It is pretty straightforward. However I also need display the y position of the label in screen during the animation. So the I can see how y position changed during the animation. How can I implement that?

Upvotes: 0

Views: 1147

Answers (2)

Gil
Gil

Reputation: 569

You can move the label by changing it's center.y property. To get the label's top border y position use frame.origin.y. This might help:

 UIView.animateWithDuration(
    0.5,
    animations: {
        label.center.y = <your destination y value> 
        label.text = label.frame.origin.y.description
    },
    completion: nil
    }
)

Hope this helps.

Upvotes: 0

rdelmar
rdelmar

Reputation: 104092

You can get the frame of the moving view from its presentationLayer. You would need to set up an NSTimer to get that value at whatever repeat interval you want.

class ViewController: UIViewController {

    let block = UIView(frame: CGRect(x: 20, y: 100, width: 80, height: 80))

    override func viewDidAppear(animated: Bool) {

        super.viewDidAppear(animated)
        block.backgroundColor = UIColor.redColor()
        self.view.addSubview(block)
        let timer = NSTimer.scheduledTimerWithTimeInterval(0.2, target: self, selector: "handleTimer", userInfo: nil, repeats: true)
        UIView.animateWithDuration(5.0, animations: { () -> Void in
             self.block.frame = CGRect(x: 300, y: 400, width: 80, height: 80)
        }) { (finished) -> Void in
            timer.invalidate()
        }
    }

    func handleTimer() {
        println(block.layer.presentationLayer().frame.origin.y)
    }
}

Upvotes: 1

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