Swift: 如何在滚动视图中使用按钮

Question

我用 "buttons" 创建了一个滚动视图。但是 "buttons" 目前实际上没有做任何事情。所以，我想知道如何使 "buttons" 可用。因此，当我按下它们时，它们会将我带到另一个视图控制器。所有按钮都会将我带到同一个视图控制器，只是在视图控制器内具有不同的数据（取决于我希望该按钮代表什么）。到目前为止，这是我的代码：

     @IBOutlet weak var categoryScrollView: UIScrollView!
    var categoryArr = ["Button1","Button2","Button3","Button4","Button5", "Button 6", "Button 7", "Button 8", "Button 9", "Button 10", "Button 11", "Button 12"]
    var buttonColors = [UIColor.greenColor(), UIColor.blueColor(), UIColor.blackColor(), UIColor.cyanColor(), UIColor.magentaColor(), UIColor.greenColor(), UIColor.blueColor(), UIColor.blackColor(), UIColor.cyanColor(), UIColor.magentaColor(), UIColor.blackColor(), UIColor.brownColor()]
    let kPadding:CGFloat = 20

    override func viewDidLoad() {
        super.viewDidLoad()

        let buttonSize = CGSizeMake(categoryScrollView.bounds.size.width/2, categoryScrollView.bounds.size.height/2)//hal

        let scrollingView = colorButtonsView(buttonSize, buttonCount: 12)
        categoryScrollView.contentSize = scrollingView.frame.size
        categoryScrollView.addSubview(scrollingView)
        categoryScrollView.showsVerticalScrollIndicator = false
        categoryScrollView.delegate = self
        categoryScrollView.pagingEnabled = true
        categoryScrollView.indicatorStyle = .Default
        categoryScrollView.contentOffset = CGPointMake(0, 0)
    }


    func colorButtonsView(buttonSize:CGSize, buttonCount:Int) -> UIView {
        let buttonView = UIView()
        buttonView.frame.origin = CGPointMake(50,300)
        let padding = CGSizeMake(kPadding, kPadding)
        buttonView.frame.size.width = (buttonSize.width + padding.width) * CGFloat(buttonCount)
        var buttonPosition = CGPointMake(0, padding.height)
        let buttonIncrement = buttonSize.width + padding.width
        for i in 0...(buttonCount - 1)  {
            let button = UIButton(type: .Custom)
            button.frame.size = buttonSize
            button.frame.origin = buttonPosition
            buttonPosition.x = buttonPosition.x + buttonIncrement
            button.setTitle(categoryArr[i], forState: UIControlState.Normal)
            button.backgroundColor = buttonColors[i]
            buttonView.addSubview(button)
        }
        buttonView.backgroundColor = UIColor.redColor()
        return buttonView
    }
}
extension ViewController:UIScrollViewDelegate{
    func scrollViewDidEndDecelerating(scrollView: UIScrollView) {

        let index = round(scrollView.contentOffset.x / scrollView.frame.size.width)
        print(index)
    }

}

Answer 1

您必须向按钮添加目标才能触发某些操作方法。就像在创建 UIButton 时的循环中一样，添加

button.addTarget(self, action: "pressed:", forControlEvents: .TouchUpInside)

并实现一种方法，例如：

func pressed(sender: UIButton!) {
    // navigation code here.
}

Answer 2

当您创建按钮时，您必须指定一个目标才能对其执行操作（将其添加到您的 for 循环中）：

 button.addTarget(self, action: "myaction:", forControlEvents: .TouchUpInside)

然后创建相应的方法

 func myaction(sender: UIButton!) {
// navigation code here.
}

请注意，您不必创建多个方法来为每个按钮执行不同的操作，您所要做的就是像这样：

 button.tag = i

然后在您的操作方法中：

switch sender.tag {

 case 0 : 
 //do some stuff

 case 1 :
 //do some stuff

 }

Swift: 如何在滚动视图中使用按钮

Swift: How to use buttons in Scroll View

scrollview

ios

swift