iOS两种绘制虚线的方法

我是虚线哦！.jpg

个人CSND

一、绘制单条的虚线

二、给一个控件添加虚线

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1、绘制单条的虚线

/**
 ** lineView:      需要绘制成虚线的view
 ** lineLength:    虚线的宽度 //2
 ** lineSpacing:        虚线的间距//1
 ** 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blackColor
    [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 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];
    
}

样式1：－－－－－－－

绘制单条虚线.jpeg

2、给一个控件添加虚线

+ (void)drawLineForView:(UIView *)view{
    
    CAShapeLayer *border = [CAShapeLayer layer];
    border.strokeColor = [UIColor blackColor].CGColor;
    border.fillColor = nil;
    border.path = [UIBezierPath bezierPathWithRect:view.bounds].CGPath;
    border.frame = view.bounds;
    border.lineWidth = 1.f;
    border.lineCap = @"square";
    border.lineDashPattern = @[@4, @2];
    [view.layer addSublayer:border];
    
}

样式2：

控件绘制虚线.png