untitled

- (void)addLineDashPattern:(UIView *)view
{
    [view.layer.sublayers enumerateObjectsUsingBlock:^(__kindof CALayer * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        [obj removeFromSuperlayer];
        obj = nil;
    }];
    
    view.layer.masksToBounds = YES;
    view.layer.cornerRadius = view.frame.size.width / 2;
    
    CAShapeLayer *border = [CAShapeLayer layer];
    //虚线的颜色
    border.strokeColor = [UIColor colorNamed:@"locationViewBackgroundColor"].CGColor;
    //填充的颜色
    border.fillColor = [UIColor clearColor].CGColor;
    
    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:view.bounds cornerRadius:view.size.width / 2];
    //设置路径
    border.path = path.CGPath;
    border.frame = view.bounds;
    //虚线的宽度
    border.lineWidth = 3.f;
    //虚线的间隔
    border.lineDashPattern = @[@8, @4];
    [view.layer addSublayer:border];
}