Objective C画虚线 DashLine(转载)

原文地址: http://blog.csdn.net/ashimar_a/article/details/53033361

代码如下:

#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>


@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self dashLine];
}

- (void)dashLine
{
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    [shapeLayer setBounds:self.view.bounds];
    [shapeLayer setPosition:CGPointMake(self.view.frame.size.width / 2.0, self.view.frame.size.height)];
    [shapeLayer setFillColor:[UIColor clearColor].CGColor];
    //设置虚线颜色
    [shapeLayer setStrokeColor:[UIColor redColor].CGColor];
    //设置虚线宽度
    [shapeLayer setLineWidth:0.5];
    [shapeLayer setLineJoin:kCALineJoinRound];
    //设置虚线的线宽及间距
    [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:5], [NSNumber numberWithInt:1], nil]];
    //创建虚线绘制路径
    CGMutablePathRef path = CGPathCreateMutable();
    //设置虚线绘制路径起点
    CGPathMoveToPoint(path, NULL, 0, 0);
    //设置虚线绘制路径终点
    CGPathAddLineToPoint(path, NULL, self.view.frame.size.width, 0);
    //设置虚线绘制路径
    [shapeLayer setPath:path];
    CGPathRelease(path);
    //添加虚线
    [self.view.layer addSublayer:shapeLayer];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end