给UIView添加圆角和边框

- (void)layerWithRadius:(CGFloat)radius corner:(UIRectCorner)corner borderWidth:(CGFloat)borderWidth borderColor:(UIColor *)borderColor
{
   if (@available(iOS 11.0, *)) {
       self.layer.cornerRadius = radius;
       self.layer.maskedCorners = (CACornerMask)corner;
       self.layer.borderWidth = borderWidth;
       self.layer.borderColor = borderColor.CGColor;
    } else {
        //设置圆角
        UIBezierPath * path = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:corner cornerRadii:CGSizeMake(radius, radius)];
        CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
        maskLayer.frame = self.bounds;
        maskLayer.path = path.CGPath;
        self.layer.mask = maskLayer;
        
        //设置边框
        CAShapeLayer *borderLayer=[CAShapeLayer layer];
        borderLayer.path= path.CGPath;
        borderLayer.fillColor  = [UIColor clearColor].CGColor;
        borderLayer.strokeColor= borderColor.CGColor;
        borderLayer.lineWidth= borderWidth;
        borderLayer.frame=self.bounds;
        [self.layer addSublayer:borderLayer];
    }
}