Swift iPad - 按钮不起作用

Posted 2023-03-21

【中文标题】Swift iPad - 按钮不起作用

【英文标题】：Swift iPad - buttons not working

【发布时间】：2016-08-10 10:41:43

【问题描述】：

我有 iPad 屏幕：

1) 按钮在更改位置时不可点击。 2) 圆形按钮图像被拉伸。

我需要创建下面屏幕中给出的按钮集。

我正在使用以下代码来创建按钮集。

class MyCommonViewController: UIViewController 

    var button: UIButton?
    var Circularbutton: UIButton?

override func viewDidLoad() 
        super.viewDidLoad()

        var xMargin:CGFloat = 20.0
        var yTopMargin:CGFloat = 40.0
        var CircularBtnxMargin:CGFloat = 180.0
        var CircularBtnyTopMargin:CGFloat = 200.0

        var i = 1     

        let TextArray = ["Button 1", "Button 2", "Button 3", "Button 4", "Button 5", "Button 6"]

        for index in 1...6
        
            button = UIButton()
            button?.tag=index
            var buttonFrame = self.view.frame
            buttonFrame.origin.x += xMargin
            buttonFrame.origin.y += yTopMargin
            buttonFrame.size.width = 200
            buttonFrame.size.height = 200

            button?.frame = buttonFrame
            button?.layer.cornerRadius = 15.0            
            button?.layer.zPosition = 10

            button?.backgroundColor = UIColor.lightGrayColor()              

            button?.setTitle(TextArray[index-1], forState: UIControlState.Normal)            
            button?.addTarget(self, action: #selector(MyCommonViewController.BigButtonTouched), forControlEvents: UIControlEvents.TouchUpInside)

            self.view.addSubview(button!)


            Circularbutton = UIButton()
            var CbuttonFrame = self.view.frame           

            CbuttonFrame.origin = CGPoint(x:CircularBtnxMargin, y:CircularBtnyTopMargin)
            CbuttonFrame.size.width = 50
            CbuttonFrame.size.height = 50          

            Circularbutton?.frame = CbuttonFrame


            Circularbutton?.tag=index
            Circularbutton?.layer.zPosition = 100


            let image = UIImage(named: "que2.png") as UIImage?
            Circularbutton?.setImage(image, forState: UIControlState.Normal)
            Circularbutton?.addTarget(self, action: #selector(MyCommonViewController.questionButtonPressed), forControlEvents: UIControlEvents.TouchUpInside)


            self.view.addSubview(Circularbutton!)

            xMargin+=250.0
            CircularBtnxMargin+=250.0
            i+=1

            if(i > 3 )
            
                yTopMargin+=300.0
                xMargin=20.0
                CircularBtnyTopMargin+=300.0
                CircularBtnxMargin=180.0
                i=1
            
        

    

1) 但是带问号的按钮除了开头的两个按钮外是不可点击的。

2）我的第二个问题是圆形按钮图像显示粗糙不均匀的边框。

你能帮帮我吗？

编辑：

func questionButtonPressed(sender:UIButton!) 

let btn:UIButton = sender

print("Circular Button Pressed - \(btn.tag)")



func BigButtonTouched(sender:UIButton!) 

let bigBtn:UIButton = sender

print("Button Pressed - \(bigBtn.tag)")

【问题讨论】：

用于 1...6 中的索引。我认为您需要从 0 循环到 5，因为它是数组的索引。

你能分享以下内容吗：questionButtonPressed func？

@RoyK - 在 questionButtonPressed 和 BigButtonTouched 的问题中添加了功能代码。

【参考方案1】：

在 for 循环的每次迭代中声明按钮，而不是在 for 循环之外。查看代码（您将需要删除所有强制展开）：

class MyCommonViewController: UIViewController 

override func viewDidLoad() 
        super.viewDidLoad()

        var xMargin:CGFloat = 20.0
        var yTopMargin:CGFloat = 40.0
        var CircularBtnxMargin:CGFloat = 180.0
        var CircularBtnyTopMargin:CGFloat = 200.0

        var i = 1     

        let TextArray = ["Button 1", "Button 2", "Button 3", "Button 4", "Button 5", "Button 6"]

        for index in 1...6
        
            let button = UIButton()
            button?.tag=index
            var buttonFrame = self.view.frame
            buttonFrame.origin.x += xMargin
            buttonFrame.origin.y += yTopMargin
            buttonFrame.size.width = 200
            buttonFrame.size.height = 200

            button?.frame = buttonFrame
            button?.layer.cornerRadius = 15.0            
            button?.layer.zPosition = 10

            button?.backgroundColor = UIColor.lightGrayColor()              

            button?.setTitle(TextArray[index-1], forState: UIControlState.Normal)            
            button?.addTarget(self, action: #selector(MyCommonViewController.BigButtonTouched), forControlEvents: UIControlEvents.TouchUpInside)

            self.view.addSubview(button!)


            let Circularbutton = UIButton()
            var CbuttonFrame = self.view.frame           

            CbuttonFrame.origin = CGPoint(x:CircularBtnxMargin, y:CircularBtnyTopMargin)
            CbuttonFrame.size.width = 50
            CbuttonFrame.size.height = 50          

            Circularbutton?.frame = CbuttonFrame


            Circularbutton?.tag=index
            Circularbutton?.layer.zPosition = 100


            let image = UIImage(named: "que2.png") as UIImage?
            Circularbutton?.setImage(image, forState: UIControlState.Normal)
            Circularbutton?.addTarget(self, action: #selector(MyCommonViewController.questionButtonPressed), forControlEvents: UIControlEvents.TouchUpInside)


            self.view.addSubview(Circularbutton!)

            xMargin+=250.0
            CircularBtnxMargin+=250.0
            i+=1

            if(i > 3 )
            
                yTopMargin+=300.0
                xMargin=20.0
                CircularBtnyTopMargin+=300.0
                CircularBtnxMargin=180.0
                i=1
            
        

    

【讨论】：

我尝试在 for 循环的每次迭代中声明按钮，但仍然没有效果。除了开始的两个按钮之外的圆形按钮不可点击