将按钮移动到随机位置（快速）

Question

I'm trying to move a button to a random position on the click of another button. Here is the code in my viewcontroller.

@IBOutlet weak var samea: UIButton!

@IBAction func yup(sender: UIButton) {

    let buttonWidth = samea.frame.width
    let buttonHeight = samea.frame.height


    let viewWidth = samea.superview!.bounds.width
    let viewHeight = samea.superview!.bounds.height


    let xwidth = viewWidth - buttonWidth
    let yheight = viewHeight - buttonHeight


    let xoffset = CGFloat(arc4random_uniform(UInt32(xwidth)))
    let yoffset = CGFloat(arc4random_uniform(UInt32(yheight)))


    samea.center.x = xoffset + buttonWidth / 2
    samea.center.y = yoffset + buttonHeight / 2

    // Do any additional setup after loading the view, typically from a nib.


}
}

I simply created an outlet for the button I want to move and then an action for the button that moves it. When I run this, it crashes at launch with the Thread 1 : signal SIGABRT error. How do I fix this?

Answer 1

So the error you are getting is a NSUnkownKeyExcpetion. What I'm assuming happened is when you wired your view controller in your storyboard to your file something got messed up. Right click on your buttons and see if there are two references on any of them. If so delete one. You may also be missing an outlet for one of your buttons that it think it should have.