在 iOS 9 之前我们使用fontWithName
的{{1}}来引用字体:
UIFont
现在我们转向iOS 9.如何以相同的方式引用新的旧金山字体?
我们可以将其与[UIFont fontWithName:@"HelveticaNeue" size:18]
的{{1}}一起使用,但如何引用常规以外的样式?例如,如何使用旧金山中等或旧金山之光字体?
答案 0 :(得分:113)
在iOS 9中,它是系统字体,因此您可以这样做:
let font = UIFont.systemFontOfSize(18)
你可以直接使用字体名称,但我不认为这是安全的:
let font = UIFont(name: ".SFUIText-Medium", size: 18)!
您也可以使用specific weight创建字体,如下所示:
let font = UIFont.systemFontOfSize(18, weight: UIFontWeightMedium)
或
let font = UIFont.systemFontOfSize(18, weight: UIFontWeightLight)
答案 1 :(得分:4)
Swift 4
label.font = UIFont.systemFont(ofSize: 22, weight: UIFont.Weight.bold)
答案 2 :(得分:0)
import UIKit
extension UIFont {
enum Font: String {
case SFUIText = "SFUIText"
case SFUIDisplay = "SFUIDisplay"
}
private static func name(of weight: UIFont.Weight) -> String? {
switch weight {
case .ultraLight: return "UltraLight"
case .thin: return "Thin"
case .light: return "Light"
case .regular: return nil
case .medium: return "Medium"
case .semibold: return "Semibold"
case .bold: return "Bold"
case .heavy: return "Heavy"
case .black: return "Black"
default: return nil
}
}
convenience init?(font: Font, weight: UIFont.Weight, size: CGFloat) {
var fontName = ".\(font.rawValue)"
if let weightName = UIFont.name(of: weight) { fontName += "-\(weightName)" }
self.init(name: fontName, size: size)
}
}
guard let font = UIFont(font: .SFUIText, weight: .light, size: 14) else { return }
// ...
let font = UIFont(font: .SFUIDisplay, weight: .bold, size: 17)!