iOS 设置View投影

需要设置 颜色 阴影半径 等元素

UIView *shadowView = [[UIView alloc] init];    shadowView.frame = CGRectMake(100, 100, 100, 100);    shadowView.center = self.view.center;        shadowView.backgroundColor = [UIColor whiteColor];    //设置阴影颜色    shadowView.layer.shadowColor = [UIColor colorWithRed:114.0/255.0 green:133.0/255.0 blue:152.0/255.0 alpha:1.0].CGColor;    //设置阴影的透明度    shadowView.layer.shadowOpacity = 0.1f;    //设置阴影的偏移    shadowView.layer.shadowOffset = CGSizeMake(30.0f, 10.0f);    //设置阴影半径    shadowView.layer.shadowRadius = 15.0f;    //设置渲染内容被缓存    shadowView.layer.shouldRasterize = YES;    //超出父视图部分是否显示    shadowView.layer.masksToBounds = NO;        shadowView.layer.borderWidth  = 0.0;        shadowView.layer.opaque = 0.10;        shadowView.layer.cornerRadius = 3.0;        //栅格化处理    shadowView.layer.rasterizationScale = [[UIScreen mainScreen]scale];            //正常矩形    UIBezierPath *path = [UIBezierPath bezierPathWithRect:shadowView.bounds];    shadowView.layer.shadowPath = path.CGPath;    [self.view addSubview:shadowView];