iOS画虚线------

直接上代码了

    // 画虚线    // 创建一个imageView 高度是你想要的虚线的高度 一般设为2    UIImageView *lineImg = [[UIImageView alloc] initWithFrame:CGRectMake(0, 20, kScreenWidth, 1)];    // 调用方法 返回的iamge就是虚线    [self drawDashLine:lineImg lineLength:4 lineSpacing:3 lineColor:GCOLOR];//    lineImg.backgroundColor = GCOLOR;    // 添加到控制器的view上    [self addSubview:lineImg];    self.lineImg = lineImg;    [lineImg mas_makeConstraints:^(MASConstraintMaker *make) {        make.left.right.mas_equalTo(@0);        make.top.equalTo(staImg.mas_bottom).offset(5);        make.height.mas_equalTo(@1);    }];/** ** lineView:       需要绘制成虚线的view ** lineLength:     虚线的宽度 ** lineSpacing:    虚线的间距 ** lineColor:      虚线的颜色 **/- (void)drawDashLine:(UIView *)lineView lineLength:(int)lineLength lineSpacing:(int)lineSpacing lineColor:(UIColor *)lineColor{    CAShapeLayer *shapeLayer = [CAShapeLayer layer];    [shapeLayer setBounds:lineView.bounds];    [shapeLayer setPosition:CGPointMake(CGRectGetWidth(lineView.frame) / 2, CGRectGetHeight(lineView.frame))];    [shapeLayer setFillColor:[UIColor clearColor].CGColor];        //  设置虚线颜色为    [shapeLayer setStrokeColor:lineColor.CGColor];        //  设置虚线宽度    [shapeLayer setLineWidth:CGRectGetHeight(lineView.frame)];    [shapeLayer setLineJoin:kCALineJoinRound];        //  设置线宽，线间距    [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:lineLength], [NSNumber numberWithInt:lineSpacing], nil]];        //  设置路径    CGMutablePathRef path = CGPathCreateMutable();    CGPathMoveToPoint(path, NULL, 0, 0);    CGPathAddLineToPoint(path, NULL, CGRectGetWidth(lineView.frame), 0);        [shapeLayer setPath:path];    CGPathRelease(path);        //  把绘制好的虚线添加上来    [lineView.layer addSublayer:shapeLayer];}