自动更改不同 iPhone 设备的字体大小

Question

是否可以为整个应用程序根据不同的 iPhone 设备大小设置不同的UILabels 字体大小？

Answer 1

我为此目的使用每个控件的自定义类

    class Label: UILabel {

    @IBInspectable var iPhoneFontSize:CGFloat = 0 {
        didSet {
            overrideFontSize(fontSize: iPhoneFontSize)
        }
    }

    @IBInspectable
    public var cornerRadius: CGFloat = 2.0 {
        didSet {
            self.layer.cornerRadius = self.cornerRadius
        }
    }

    @IBInspectable
    public var borderWidth: CGFloat = 0 {
        didSet {
            self.layer.borderWidth = self.borderWidth
        }
    }

    @IBInspectable
    public var borderColor: UIColor = .clear {
        didSet {
            self.layer.borderColor = self.borderColor.cgColor
        }
    }

   private func overrideFontSize(fontSize:CGFloat){
        let currentFontName = self.font.fontName
        var calculatedFont: UIFont?
        let bounds = UIScreen.main.bounds
        let height = bounds.size.height
        switch height {
        case 480.0: //Iphone 3,4,SE => 3.5 inch
            calculatedFont = UIFont(name: currentFontName, size: fontSize * 0.7)
            self.font = calculatedFont
            break
        case 568.0: //iphone 5, 5s => 4 inch
            calculatedFont = UIFont(name: currentFontName, size: fontSize * 0.8)
            self.font = calculatedFont
            break
        case 667.0: //iphone 6, 6s, 7, 7s => 4.7 inch
            calculatedFont = UIFont(name: currentFontName, size: fontSize * 0.9)
            self.font = calculatedFont
            break
        case 736.0: //iphone 6+, 6s+, 7+, 7s+ => 5.5 inch
            calculatedFont = UIFont(name: currentFontName, size: fontSize)
            self.font = calculatedFont
            break
        default: // New devices
            calculatedFont = UIFont(name: currentFontName, size: fontSize)
            self.font = calculatedFont
            break
        }

    }
}

然后在 Storyboard 中为最高分辨率设置 iPhoneFontSize 属性值，如下面的屏幕截图所示。