为navigationBar添加阴影 发表于 2016-07-05 | 效果 代码1234self.navigationController.navigationBar.layer.shadowColor = [UIColor blackColor].CGColor; //shadowColor阴影颜色self.navigationController.navigationBar.layer.shadowOffset = CGSizeMake(2.0f, 2.0f); // shadowOffset阴影偏移x,y向(上/下)偏移(-/+)2self.navigationController.navigationBar.layer.shadowOpacity = 0.3f; //阴影透明度,默认0self.navigationController.navigationBar.layer.shadowRadius = 4.0f; //阴影半径