如何将阴影添加到导航栏而不是默认边框

Question

我想用阴影替换UINavigationBar中的默认边框。有什么办法可以做到这一点？我曾尝试使用与向UIView添加阴影相同的方法，但它增加了我的NavigationBar的高度。

Answer 1

试试这个

self.navigationController.navigationBar.layer.shadowColor = UIColor.blackColor().CGColor 
self.navigationController.navigationBar.layer.shadowOffset = CGSizeMake(2.0, 2.0) 
self.navigationController.navigationBar.layer.shadowRadius = 4.0 
self.navigationController.navigationBar.layer.shadowOpacity = 1.0 

斯威夫特3

override func viewDidLoad() { 
    super.viewDidLoad() 

    self.navigationController?.navigationBar.layer.shadowColor = UIColor.black.cgColor 
    self.navigationController?.navigationBar.layer.shadowOffset = CGSize(width: 0.0, height: 2.0) 
    self.navigationController?.navigationBar.layer.shadowRadius = 4.0 
    self.navigationController?.navigationBar.layer.shadowOpacity = 1.0 
    self.navigationController?.navigationBar.layer.masksToBounds = false 
} 

输出