如何使按钮闪烁或闪烁？ [英] How to make a button flash or blink?

问题描述

我试图在扫描正确时将按钮的颜色（只是闪烁/闪烁）更改为绿色，在出现问题时将其更改为红色。我可以用这样的视图做到这一点

I am trying to change a button's color (just a flash/blink) to green when a scan is correct and red when there's a problem. I am able to do this with a view like so

func flashBG(){
    UIView.animateWithDuration(0.7, animations: {
        self.view.backgroundColor = UIColor.greenColor()

    })
}

但是有一个按钮它会保持绿色

But with a button it stays green

func flashBtn(){
    UIButton.animateWithDuration(0.5, animations: {
        self.buttonScan.backgroundColor = UIColor.greenColor()
    })
}

我已按代码创建按钮

func setupScanButton() {
    let X_Co = (self.view.frame.size.width - 100)/2
    let Y_Co = (self.viewForLayer.frame.size.height + 36/2)

    buttonScan.frame = CGRectMake(X_Co,Y_Co,100,100)
    buttonScan.layer.borderColor = UIColor.whiteColor().CGColor
    buttonScan.layer.borderWidth = 2
    buttonScan.layer.cornerRadius = 50
    buttonScan.setTitle("Scan", forState: .Normal)
    buttonScan.backgroundColor = UIColor.blueColor()
    buttonScan.addTarget(self, action: "buttonScanAction", forControlEvents: .TouchUpInside)
    buttonScan.setTitleColor(UIColor(red:255/255, green: 255/255, blue:255/255, alpha: 1), forState: UIControlState.Normal)

    self.view.addSubview(buttonScan)
}

我应该再次调用setupScanButton（）吗？

Should i call setupScanButton() again?

推荐答案

我希望这能解决你的问题。

I hope that will solve your problem.

UIView.animateWithDuration(1.0, delay: 1.0, options: UIViewAnimationOptions.CurveEaseOut, animations: {

    buttonScan.alpha = 0.0

    }, completion: nil)   

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