iOS开发 view添加斜对角线（划线价）

效果如图 截屏2022-06-20 09.38.40.png

实现思路还是较多的
1.创建一个view 给予旋转
2.贝塞尔曲线直接连线
今天就以第二张方式实现，
talk is cheap, show your code

  UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 100, 40)];
    label.backgroundColor = UIColor.systemGreenColor;
    label.textAlignment = NSTextAlignmentCenter;
    label.text = @"(¥98.00/年)";
    [self.view addSubview:label];
    
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:CGPointMake(0, 40)];
    [path addLineToPoint:CGPointMake(100, 0)];
    CAShapeLayer * shapeLayer = [CAShapeLayer layer];

    shapeLayer.strokeColor = UIColor.systemRedColor.CGColor;

    shapeLayer.fillColor = [UIColor clearColor].CGColor;
    /// 添加路径
    shapeLayer.path = path.CGPath;
    /// 线宽度
    shapeLayer.lineWidth = 2;
    
    [label.layer addSublayer:shapeLayer];

拓展:
写到view的category里面，
创建一个枚举，实现对角划线以及中间划线以及下划线几种样式