#import@interface DashesLineView : UIView

@property(nonatomic)CGPoint startPoint;//虚线起点

@property(nonatomic)CGPoint endPoint;//虚线终点

@property(nonatomic,strong)UIColor* lineColor;//虚线颜色

@end

#import “DashesLineView.h"

@implementation DashesLineView

- (void)drawRect:(CGRect)rect

{

CGContextRef context =UIGraphicsGetCurrentContext();

CGContextBeginPath(context);

CGContextSetLineWidth(context,1.5);//线宽度

CGContextSetStrokeColorWithColor(context,self.lineColor.CGColor);

CGFloat lengths[] = {4,2};//先画4个点再画2个点

CGContextSetLineDash(context,0, lengths,2);//注意2(count)的值等于lengths数组的长度

CGContextMoveToPoint(context,self.startPoint.x,self.startPoint.y);

CGContextAddLineToPoint(context, self.endPoint.x, 0);

CGContextAddLineToPoint(context,self.endPoint.x,self.endPoint.y);

CGContextAddLineToPoint(context, 0,self.endPoint.y);

CGContextAddLineToPoint(context, 0.0, 0.0);

CGContextStrokePath(context);

CGContextClosePath(context);

}

@end