iOS中画虚线的方法【项目中可能会用到】

/**

 ** 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]];

    //  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];

}