ios - 点击时 UIImageView 图像更改延迟

Question

我有一个带有点击手势识别器的 UIImageView。点击时我希望 UIImageView 在 2 个图像之间交替。我的代码实现了这一点，但是当 UIImageView 被快速重复点击时，UIImageView 似乎滞后并落后。

我的代码:

@IBOutlet weak var moneyButton: UIImageView!

let benchUpImage = UIImage(named: "benchUp")
let benchDownImage = UIImage(named: "benchDown")
var benchIsDown = false

func moneyButtonPressed(sender: UITapGestureRecognizer){

    if benchIsDown == false{
        moneyButton.image = benchDownImage
        benchIsDown = true
    }else{
        moneyButton.image = benchUpImage
        benchIsDown = false
    }

}

Answer 1

swift 3.0

您可以简单地允许用户点击一段时间。考虑用下面的代码替换您的代码

var canUserTap = true
let delayTime = 0.4 //setDelayTimming in seconds
@IBAction func moneyButtonPressed( _ sender : UITapGestureRecognizer){
    if(canUserTap){
        if benchIsDown == false{
            moneyButton.image = benchDownImage
            benchIsDown = true
        }else{
            moneyButton.image = benchUpImage
            benchIsDown = false
        }
        canUserTap = false
        Timer.scheduledTimer(timeInterval: delayTime,
                             target:self,
                             selector:#selector(allowUserTap(_:)),
                             userInfo:nil,
                             repeats:false)
    }

}

func allowUserTap(_ timer:Timer){
    canUserTap = true

}