使用CAShapeLayer对象使用Bezierpath绘制线条 [英] Drawing a line with Bezierpath using CAShapeLayer object

问题描述

我正在制作一个图像编辑器，可以创建不同形状的对象，如圆形，三角形和方形，也可以更新或删除。所以我使用 CAShapeLayer 来创建形状对象。

I am making an image editor which can create different shapes objects like circle, triangle and square which can also be updated or removed. So I have used CAShapeLayer for creating shapes objects.

现在我还想在图像上画一条线也可以更新或删除所以我使用了bezierpath和 CAShapeLayer 创建该行，它工作正常。但现在的问题是，当我想选择任何现有的行时，可以选择任何接近行工具的地方，因为 CAShapeLayer 也设置了一条直线的填充区域从起点到终点。

Now I also want to draw a line on image which can also be updated or removed so I have used bezierpath and CAShapeLayer to create the line, it is working fine. BUT now the problem is that when I want to select any existing line it can be selected any where close to line tool because CAShapeLayer also set the fill region which will be a straight line from start point to end point.

我的问题是如何使用 CAShapeLayer 创建没有填充区域的行。

My question is that how can I create line with no fill region using CAShapeLayer.

这是我创建行的代码：

CAShapeLayer *line = [CAShapeLayer layer];
// Using bezierpath to make line 
UIBezierPath *linePath=[UIBezierPath bezierPath];

// Creating L with line

[linePath moveToPoint:point1];
[linePath addToPoint:point2];
[linePath addToPoint:point3];
line.path=linePath.CGPath;


// Configure the appearence of the line
line.fillColor = Nil;
line.opacity = 1.0;
line.strokeColor = [UIColor whiteColor].CGColor;

对此的任何想法都将非常感激。

Any idea on this will be really appreciated.

推荐答案

你能试试吗？它为我工作

Can you try this. Its work for me

    CAShapeLayer *line = [CAShapeLayer layer];
    UIBezierPath *linePath=[UIBezierPath bezierPath];
    [linePath moveToPoint:CGPointMake(startx, starty)];
    [linePath addLineToPoint:CGPointMake(endx, endy)];
    line.lineWidth = 10.0;
    line.path=linePath.CGPath;
    line.fillColor = shapecolor.CGColor;
    line.strokeColor = shapecolor.CGColor;
    [[self.view layer] addSublayer:line];

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