Swift版

 /// 添加圓角和陰影 radius:圓角半徑 shadowOpacity: 陰影透明度 (0-1) shadowColor: 陰影顏色
   func addRoundedOrShadow(radius:CGFloat, shadowOpacity:CGFloat, shadowColor:UIColor)  {
        self.layer.cornerRadius = radius
        self.layer.masksToBounds = true
        let subLayer = CALayer()
        let fixframe = self.frame
        let newFrame = CGRect(x: fixframe.minX-(375-UIScreen.main.bounds.size.width)/2, y: fixframe.minY, width: fixframe.width, height: fixframe.height) // 修正偏差
        subLayer.frame = newFrame
        subLayer.cornerRadius = radius
        subLayer.backgroundColor = UIColor.white.cgColor
        subLayer.masksToBounds = false
        subLayer.shadowColor = shadowColor.cgColor // 陰影顏色
        subLayer.shadowOffset = CGSize(width: 0, height: 0) // 陰影偏移,width:向右偏移3沽瞭，height:向下偏移2坝冕，默認(rèn)(0, -3),這個(gè)跟shadowRadius配合使用
        subLayer.shadowOpacity = Float(shadowOpacity) //陰影透明度
        subLayer.shadowRadius = 5;//陰影半徑足淆，默認(rèn)3
        self.superview?.layer.insertSublayer(subLayer, below: self.layer)
    }

經(jīng)過測(cè)試添加的CALayer會(huì)偏移一點(diǎn) 不知道是啥問題 需要修正

        let fixframe = self.frame
        let newFrame = CGRect(x: fixframe.minX-(375-UIScreen.main.bounds.size.width)/2, y: fixframe.minY, width: fixframe.width, height: fixframe.height)
        subLayer.frame = newFrame

OC版

/* 添加圓角和陰影 
shadowOpacity: 陰影透明度
shadowColor: 陰影顏色
radius:圓角半徑
*/
- (void)addProjectionWithShadowOpacity:(CGFloat)shadowOpacity shadowColor:(UIColor *)shadowColor radius:(CGFloat)radius{
    self.layer.cornerRadius = radius;
    self.layer.masksToBounds = YES;
    CALayer *subLayer=[CALayer layer];
    CGRect fixframe = self.frame;
    subLayer.frame = fixframe;
    subLayer.cornerRadius = radius;
    subLayer.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.8].CGColor;
    subLayer.masksToBounds = NO;
    subLayer.shadowColor = shadowColor.CGColor;//shadowColor陰影顏色
    subLayer.shadowOffset = CGSizeMake(3,3);//shadowOffset陰影偏移, width:向右偏移3，height:向下偏移3功炮，默認(rèn)(0, -3),這個(gè)跟shadowRadius配合使用
    subLayer.shadowOpacity = shadowOpacity;//陰影透明度
    subLayer.shadowRadius = 3;//陰影半徑，默認(rèn)3
    [self.superview.layer insertSublayer:subLayer below:self.layer];
}

修改版

注意:
1.使用此方法 添加圓角與陰影View之上不能出現(xiàn)其他View將其遮蓋(因?yàn)閟elf.layer.masksToBounds = false)不能進(jìn)行多余部分裁剪 故有遮蓋會(huì)將圓角遮蓋
2.self.layer.masksToBounds = true 陰影會(huì)被裁剪掉

image.png

func addShadow(shadowOpacity:Float, shadowColor:UIColor, radius:CGFloat)  {
        self.layer.shadowColor = shadowColor.cgColor
        self.layer.shadowOpacity = shadowOpacity
        self.layer.shadowOffset = CGSize(width: 0, height: 0)
        self.layer.shadowRadius = 6
        self.layer.cornerRadius = radius
//        self.layer.masksToBounds = true  // 不能使用 不然陰影會(huì)被裁剪
    }