ios - Change WKInterfaceButton background image on tap

Question

I'm trying to change the background image of a WKInterfaceButton in my storyboard when a tap occurs. Also, on calling the setBackgroundImage to change the image, appendValue(1) does not work.

class keyPadInterfaceController : WKInterfaceController{
    @IBOutlet weak var OneClicked: WKInterfaceButton!
        let whiteImage = UIImage(named:"keybutton1.png")
        let goldImage = UIImage(named:"keybutton2.png")

    @IBAction func OneTapped(sender:AnyObject) {
        OneClicked.setBackgroundImage(goldImage)
        appendValue(1) 
    }
}

Answer 1

要访问图像，setBackgroundImage 您必须首先从用户 iPhone 传递它们。

或者，您可以使用setBackgroundImageNamed. 因此，WatchKit 首先检查您的 WatchKit 应用程序包，然后是设备端缓存。

OneClicked.setBackgroundImageNamed("keybutton2.png")