Swift 中 UIButton 的圆顶角

使用Swift中的UIButton，我们可以轻松地为按钮添加圆角。圆角使按钮看起来更加现代和吸引人，并增加了用户与应用程序进行交互的兴趣。在本文中，我们将学习如何在Swift中使用UIButton的圆角功能，并提供一些案例代码作为示例。

swift
import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let button = UIButton(type: .system)
        button.frame = CGRect(x: 100, y: 100, width: 200, height: 50)
        button.setTitle("Click Me", for: .normal)
        button.layer.cornerRadius = 10 // 设置按钮的圆角半径
        button.layer.masksToBounds = true // 将超出圆角部分裁剪掉
        button.backgroundColor = .blue
        button.setTitleColor(.white, for: .normal)
        
        self.view.addSubview(button)
    }
}

swift
import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let button1 = UIButton(type: .system)
        button1.frame = CGRect(x: 100, y: 100, width: 200, height: 50)
        button1.setTitle("Button 1", for: .normal)
        button1.layer.cornerRadius = 10
        button1.layer.masksToBounds = true
        button1.backgroundColor = .blue
        button1.setTitleColor(.white, for: .normal)
        
        self.view.addSubview(button1)
        
        let button2 = UIButton(type: .system)
        button2.frame = CGRect(x: 100, y: 200, width: 200, height: 50)
        button2.setTitle("Button 2", for: .normal)
        button2.layer.cornerRadius = 25
        button2.layer.masksToBounds = true
        button2.backgroundColor = .red
        button2.setTitleColor(.white, for: .normal)
        
        self.view.addSubview(button2)
    }
}