swift - tvOS按钮 Action

我通过Swift在tvOS中创建了一个UIButton

let randomBtn = UIButton()
randomBtn.setTitle("Zufällig", forState: .Normal)
let RndNormal = UIImage(named: "RndNormal")
let RndHoover = UIImage(named: "RndHoover")
randomBtn.setImage(RndNormal, forState: .Normal)
randomBtn.setImage(RndHoover, forState: .Focused)
randomBtn.setTitleColor(UIColor.blackColor(), forState: .Normal)
randomBtn.setTitleColor(UIColor.whiteColor(), forState: .Focused)

randomBtn.addTarget(self, action: #selector(ViewController.click(_:)), forControlEvents: UIControlEvents.TouchUpInside)

let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
randomBtn.frame = CGRect(x: screenWidth - 150, y: 60 , width: 70 , height: 70)
self.view.addSubview(randomBtn)

但是，如果我按该按钮，操作就永远不会触发，tvOS有什么不同吗？

func click(sender: UIButton) {
    print("click")
}

最佳答案

在tvOS中，按钮操作UIControlEvents TouchUpInside将不会调用。

您必须像下面那样使用UIControlEvents PrimaryActionTriggered。

randomBtn.addTarget(self, action: #selector(ViewController.click(_:)), forControlEvents: UIControlEvents. PrimaryActionTriggered)

如果您有任何困惑，也请引用此链接

https://forums.developer.apple.com/thread/17925

关于swift - tvOS按钮 Action ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38410885/