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在 iPhone 上以增加的线宽绘制线条

发布于 2024-12-12 07:23:32 字数 140 浏览 0 评论 0原文

我在 iOS 上通过在 CALayer 上画一条路径来画一条线。如何用不断增加的 lineWidth（描边宽度）来描画这条线，使线的左端比右端细？（它确实必须是一条线，而不是形状或闭合路径，因为我将使用 strokeEnd 属性。）

感谢您的帮助！

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凤舞天涯 2024-12-19 07:23:32

使用绘图功能。一开始习惯起来很烦人，但它确实起到了作用。如果您需要更多帮助，请发表评论

-(void)draw{
     float lineHeight = 5;//change this as you see fit, like set it equal to an incrementing/decrementing variable of your choice...
     glEnable(GL_LINE_SMOOTH);
     glLineWidth(lineHeight); // change this as you see fit
     glColor4ub(255,255,255,255); // change these as you see fit :)
     ccDrawLine(ccp(10,310), ccp(30,310));  // these numbers are probably off, you'll   have to mess with these to get it in the right position :)
        [super draw];
        }

Use a draw function. It's pretty annoying to get used to at first, but it does its job. If you need anymore help just leave comment

-(void)draw{
     float lineHeight = 5;//change this as you see fit, like set it equal to an incrementing/decrementing variable of your choice...
     glEnable(GL_LINE_SMOOTH);
     glLineWidth(lineHeight); // change this as you see fit
     glColor4ub(255,255,255,255); // change these as you see fit :)
     ccDrawLine(ccp(10,310), ccp(30,310));  // these numbers are probably off, you'll   have to mess with these to get it in the right position :)
        [super draw];
        }

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