iOS开发之自定义字体

import UIKit

class ViewController: UIViewController {
    lazy var nomalLabel: UILabel = {
        let label = UILabel(frame: CGRect(x: 20, y: 150, width: 300, height: 30))
        label.font = .systemFont(ofSize: 21)
        label.text = "I Love Swift and iOS，汉字弢"
        return label
    }()

    lazy var customLabel: UILabel = {
        let label = UILabel(frame: CGRect(x: 20, y: 200, width: 300, height: 30))
        label.font = UIFont(name: "Cascadia", size: 21)
        // 如果自定义字体中不包含显示内容中的文字，则使用系统字体替换
        label.text = "I Love Swift and iOS，汉字弢"
        return label
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        view.addSubview(nomalLabel)
        view.addSubview(customLabel)
    }
}

// 查看所有已注册的字体（包括系统字体）
for family in UIFont.familyNames.sorted() {
    let names = UIFont.fontNames(forFamilyName: family)
    print(family, names)
}