Question

我正在尝试更改iPad的弧形图层线宽，如下所示，但它无法正常工作。

  func setup() {

        let model = UIDevice.current.model
        if model == "iPad" {

            backgroundArcLayer.lineWidth =  36.0
            backgroundArcLayer.fillColor = nil
            backgroundArcLayer.strokeEnd = 2
            layer.addSublayer(backgroundArcLayer)
            frontArcLayer.lineWidth = 36.0
            frontArcLayer.fillColor = nil
            frontArcLayer.strokeEnd = 1.0
            layer.addSublayer(frontArcLayer)

        }

        backgroundArcLayer.lineWidth =  18.0
        backgroundArcLayer.fillColor = nil
        backgroundArcLayer.strokeEnd = 1
        layer.addSublayer(backgroundArcLayer)
        frontArcLayer.lineWidth = 18.0
        frontArcLayer.fillColor = nil
        frontArcLayer.strokeEnd = 0.5
        layer.addSublayer(frontArcLayer)  
    }

我错过了什么？

Answer 1

好吧，您已经覆盖了if声明中已设置的所有属性，因为您没有在else正文中使用其他方法。

Answer 2

您可以全局声明iPhone和iPad，以便访问项目中的任何位置。然后尝试这样：

 let IsIPhone = UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.phone
 let IsIPad = UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad

您可以使用以下方法检查iPhone和iPad：

 func setup() {

   if IsIPad{

        backgroundArcLayer.lineWidth =  36.0
        backgroundArcLayer.fillColor = nil
        backgroundArcLayer.strokeEnd = 2
        layer.addSublayer(backgroundArcLayer)
        frontArcLayer.lineWidth = 36.0
        frontArcLayer.fillColor = nil
        frontArcLayer.strokeEnd = 1.0
        layer.addSublayer(frontArcLayer)

    }else{

        backgroundArcLayer.lineWidth =  18.0
        backgroundArcLayer.fillColor = nil
        backgroundArcLayer.strokeEnd = 1
        layer.addSublayer(backgroundArcLayer)
        frontArcLayer.lineWidth = 18.0
        frontArcLayer.fillColor = nil
        frontArcLayer.strokeEnd = 0.5
        layer.addSublayer(frontArcLayer)  
    }
}

它有助于检查iPad和iPhone。

如何在iPad中更改视图中控件的大小？

2 个答案: