我应该在哪里写代码来添加标签？

Question

我想添加标签。我应该在哪里编写代码来添加标签？

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        var x = 20.0
        var y = 100.0
        let width = 100.0

        let offsetX = 80.0
        let offsetY = 80.0

        for i in 1 ... 9 {
            let button = UIButton(frame: CGRect(x: x, y: y, width: width, height: width))
            button.tag = i
            button.setTitle("\(i)", for: UIControlState.normal)
            button.setTitleColor(UIColor.green, for: UIControlState.normal)
            button.addTarget(self, action: #selector(self.buttonPressed(button:)), for: UIControlEvents.touchUpInside)
            self.view.addSubview(button)

            x = x + offsetX

            if i%3 == 0 {
                y = y + offsetY
                x = 20.0
            }
        }
    }

    @objc func buttonPressed (button:UIButton) {
        print("Button Pressed: \(button.tag)")
    }
}

Answer 1

let lblNew = UILabel(frame: CGRect(x: x, y: y, width: width, height: width))
lblNew.backgroundColor = UIColor.clear
lblNew.text = "Label Text"
lblNew.textColor = UIColor.black
view.addSubview(lblNew)

Answer 2

如果您只是想添加标签。您可以使用以下代码。

window

如果您想添加每个按钮。你可以放入循环并相应地改变x和y的值。