Question

我需要改变UIView的颜色然后点击它。我怎么能这样做？

P.S。对不起我的英文

Answer 1

这是步骤。

将UIView拖到ViewController
然后为它创建一个IBOutlet。（只需将连接拖到viewcontroller类）。
然后为它创建手势。
然后为它创建一个动作。
分配行动

这是视图控制器的完整代码

import UIKit

class ViewController: UIViewController {


    //Outlet Connection to your View

    @IBOutlet weak var myView: UIView!


    override func viewDidLoad() {
        super.viewDidLoad()

        myView.layer.borderColor = UIColor.black.cgColor
        myView.layer.borderWidth = 2


        let taptoColorGesture = UITapGestureRecognizer.init(target: self, action: #selector(ViewController.changeMyColor))
        myView.addGestureRecognizer(taptoColorGesture)

        // Do any additional setup after loading the view, typically from a nib.
    }


    func changeMyColor () {

        let colorR : Float = Float(Int(arc4random_uniform(255)))
        let colorG : Float = Float(arc4random_uniform(255))
        let colorB : Float = Float(arc4random_uniform(255))

        let themyColor = UIColor.init(colorLiteralRed: colorR/255, green: colorG/255, blue: colorB/255, alpha: 1.0)

        myView.backgroundColor = themyColor

       //this function creates random color each time
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

这是github Change the UIView Color on tap in Swift

Answer 2

//首先转到身份检查器并在视图上设置“启用用户交互” //然后将其放在viewDidLoad方法中（将myExampleView更改为您的视图名称）

let tapChangeColor = UITapGestureRecognizer(target: self, action: #selector(changeColor)) 
self.myExampleView.addGestureRecognizer(tapChangeColor)

//将此方法放在ViewController类中的某个位置：

func changeColor() {

self.myExampleView.backgroundColor=UIColor.blue

}

点击UIView并更改颜色本身

2 个答案: