iOS学习- OC绘制虚线

//绘制虚线
- (void)drawDashLine {
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    [shapeLayer setBounds:self.bounds];
    [shapeLayer setPosition:self.center];
    [shapeLayer setFillColor:[UIColor clearColor].CGColor];
    [shapeLayer setStrokeColor:[UIColor redColor].CGColor];
    [shapeLayer setLineWidth:1.5f];
    [shapeLayer setLineJoin:kCALineJoinRound];
    [shapeLayer setLineDashPattern:@[@6, @3]];
    //设置绘制的路径
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:CGPointMake(0, 0)];
    [path addLineToPoint:CGPointMake(self.frame.size.width, 0)];
    [shapeLayer setPath:path.CGPath];
    [self.layer addSublayer:shapeLayer];
}