ios - 如何在 UIView 中绘制多个不同颜色的 UIBezierPath

Question

我想在一个 UIView 中用不同的描边和填充颜色绘制多个 UIBezierPath。

这是代码

- (void)drawRect:(CGRect)rect {

    context = UIGraphicsGetCurrentContext();

    [[UIColor grayColor] setFill]; 
    [[UIColor greenColor] setStroke];

    UIBezierPath *aPath = [[UIBezierPath alloc] init]; 
    [aPath moveToPoint:CGPointMake(227,34.25)];
    [aPath addLineToPoint:CGPointMake(298.25,34.75)];
    [aPath addLineToPoint:CGPointMake(298.5,82.5)];
    [aPath addLineToPoint:CGPointMake(251,83)];
    [aPath addLineToPoint:CGPointMake(251,67.5)];
    [aPath addLineToPoint:CGPointMake(227.25,66.75)];   
    [aPath closePath]; 
    aPath.lineWidth = 2;
    [aPath fill]; 
    [aPath stroke];

    UIBezierPath *aPath2 = [[UIBezierPath alloc] init];
    [aPath2 moveToPoint:CGPointMake(251.25,90.5)];
    [aPath2 addLineToPoint:CGPointMake(250.75,83.25)];
    [aPath2 addLineToPoint:CGPointMake(298.5,83)];
    [aPath2 addLineToPoint:CGPointMake(298.5,90.25)];
    [aPath2 closePath];
    aPath2.lineWidth = 2;
    [aPath2 fill]; 
    [aPath2 stroke];
    [paths addObject:aPath2];

问题是描边和填充颜色是在当前上下文中设置的。是否可以在同一个 CGContextRef 中绘制不同颜色的不同 UIBezierPath？

或者我必须在单独的 UIView 中绘制每个 UIBezierPath？

Answer 1

你应该添加

[desiredStrokeColor setStroke];
[desiredFillColor setFill];

表示这些是必须在此上下文中进一步使用的新颜色。每次调用

之前都应该这样做

[aNewPath fill];
[aNewPath stroke];

以便用这些颜色绘制路径。

无需为每个贝塞尔曲线路径使用新 View 。