Xamarin Ios-仅在一侧创建圆形按钮 [英] Xamarin Ios - Create rounded buttons on only 1 side

问题描述

我目前正在为Xamarin Ios开发一个应用程序，我正在努力寻找一种方法来将圆形边框仅应用到UIButton类型的按钮的一侧.

I'm currently developing an App for Xamarin Ios and i'm struggling to find a way to apply a rounded border to simply one side off a button of a UIButton type.

推荐答案

在UIButton子类中，重写LayoutSubviews方法并添加掩码:

In your UIButton subclass, override the LayoutSubviews method and add a mask:

public override void LayoutSubviews()
{
    var maskingShapeLayer = new CAShapeLayer()
    {
        Path = UIBezierPath.FromRoundedRect(Bounds, UIRectCorner.BottomLeft | UIRectCorner.TopLeft, new CGSize(20, 20)).CGPath
    };
    Layer.Mask = maskingShapeLayer;
    base.LayoutSubviews();
}

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