我有一个矩形边界(10,20,100,200),CGPoints是StartPoint (0.5,0.5)和EndPoints as (1,1)。从这些点开始,如何计算段的边界?我需要为CGGradient的起始点和结束点应用此边界。GradientColor gradientColor1 = new GradientColor(){StartPoint = new CGPoint(0.5, 0), EndPoint= new CGPoint(0.5, 1)};
GradientStop stop1 = new GradientStop() { Color = UIColor.