ios - 让按钮快速改变颜色

Question

有谁知道如何让按钮快速改变颜色？我有矩形按钮，里面有文字和空心背景，我希望空心空间每 3 秒左右改变一次颜色。谁能帮忙，我将不胜感激!

Answer 1

你可以试试吗

 var counter = 0
 var pageChangeTimer: Timer?
 let colors = [UIColor.red,UIColor.green,,,,,,,,,] //,,,, set more

 pageChangeTimer = Timer.scheduledTimer( withTimeInterval: 3.0 , repeats: true) { [weak self] timer in 

    if counter == colors.count {
       counter = 0
    }
     self.btn.backgroundColor = colors[counter]  
    counter += 1      

}