如何限制按钮点击 [英] How to restrict button click

问题描述

我有这样的 VC

对于复选框，我嵌入了 UIButtons，并且我在点击时更改了它们的图像.这是我的代码

for the checkBoxes i have embedded UIButtons and i am changing their image on click. Here's my code

@IBOutlet weak var bestSellerButton: UIButton!
@IBOutlet weak var trendingButton: UIButton!
@IBOutlet weak var lowToHighButton: UIButton!
@IBOutlet weak var highToLowButton: UIButton!

    var isBoxClicked = Bool()

    func updateCheckImageOnClick(button: UIButton) {
    if isBoxClicked == true {
        isBoxClicked = false
        button.setImage(UIImage.init(named: "checkmark"), for: UIControlState.normal)
    }
    else {
        isBoxClicked = true
        button.setImage(UIImage(), for: UIControlState.normal)
    } 
}


 @IBAction func clickedBestSellerBtn(_ sender: Any) {
    updateCheckImageOnClick(button: bestSellerButton)
}

@IBAction func clickedTrendingBtn(_ sender: Any) {
    updateCheckImageOnClick(button: trendingButton)
}

其余两个也是如此.现在，每次点击设置和取消设置时，复选标记图像都会正确设置，但我想限制用户，比如如果他点击畅销书 btn 他无法选择其余的，同样如果他点击趋势他无法选择任何其他.我该怎么做?

likewise for the rest two. Now the check mark image is being set properly every time on click gets set and unset, but i want to restrict the user like if he clicks on best seller btn he's unable to choose the rest, likewise if he clicks trending he can't select any other. How would i do that?

推荐答案

Usama 我已经为所有可能满足您需求的按钮实现了一个简单的按钮操作.这是一步一步的实现 -

Usama I've implemented a simple button action for all those buttons which may accomplish your need. Here is the step by step implementation -

首先，声明这些变量-

var buttonSelected:Bool = false

var selectedButton : UIButton?

第二，为所有按钮添加一个@IBAction -

Second, Add a single @IBAction for all buttons -

第三，下面是动作方法——

@IBAction func btnSelection(_ sender: UIButton) {

    if(buttonSelected){

        if(selectedButton == sender){

            buttonSelected = false

            selectedButton = nil

            sender.setImage(UIImage(), for: UIControlState.normal)

        }
        else{

            // It's not the previously selected button
            //Do your stuff
        }

    }
    else{

        buttonSelected = true

        selectedButton = sender

        sender.setImage(UIImage.init(named: "checkmark"), for: UIControlState.normal)

    }

}

希望它能帮助你开始.

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