iOS画虚线

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//画虚线

CAShapeLayer *shapeLayer = [CAShapeLayerlayer];

shapeLayer.frame=CGRectMake(15,300,290,0.5);

[shapeLayer setFillColor:[[UIColorclearColor]CGColor]];

// 设置虚线颜色为blackColor

[shapeLayer setStrokeColor:[UIColorblackColor].CGColor];

//设置虚线的宽度

[shapeLayer setLineWidth:shapeLayer.bounds.size.height];

[shapeLayer setLineJoin:kCALineJoinRound];

[shapeLayer setLineDashPattern:[NSArrayarrayWithObjects:[NSNumbernumberWithInt:2],nil]]; //.......1

CGMutablePathRef path =CGPathCreateMutable();

CGPathMoveToPoint(path,NULL,0,0);

CGPathAddLineToPoint(path, NULL,shapeLayer.bounds.size.width,0);

[shapeLayer setPath:path];

CGPathRelease(path);

[[self.viewlayer]addSublayer:shapeLayer];

效果如图：

改变第一行代码为：

[shapeLayer setLineDashPattern:[NSArrayarrayWithObjects:[NSNumbernumberWithInt:3],[NSNumbernumberWithInt:5],[NSNumbernumberWithInt:20],[NSNumbernumberWithInt:5],nil]];

效果如图：

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