1  override func viewDidLoad() {
 2      super.viewDidLoad()
 3      // Do any additional setup after loading the view, typically from a nib.
 4      //Prompt 属性被设置以后，其高度变为74
 5      self.navigationItem.prompt = "顶端提示"
 6      //设置导航视图标题
 7      self.title = "导航视图标题"
 8      //设置当前视图控制器的背景颜色为白色
 9      self.view.backgroundColor = UIColor.white
10      //修改导航栏背景图片（使用代码动态生成的纯色图片）
11      let image = createImageWithColor(UIColor.white,frame: CGRect(x: 0, y: 0, width: 1, height: 1))
12      self.navigationController?.navigationBar.setBackgroundImage(image, for: .default)
13      //设置背景色为不透明
14      self.navigationController?.navigationBar.isTranslucent = false
15      //设置两侧按钮颜色
16      self.navigationController?.navigationBar.tintColor = UIColor.gray
17      //设置主题颜色为黑色透明
18      self.navigationController?.navigationBar.barStyle = UIBarStyle.blackTranslucent
19      //设置左侧文件夹按钮图标，并绑定按钮点击事件
20      self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .organize,
21                                           target: self,
22                                           action: #selector(openPhotoAlbum))
23      //设置右侧相机按钮图标，并绑定按钮点击事件
24      self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .camera,
25                                            target: self,
26                                            action: #selector(ScanQRCode))
27     }
28 
29 //打开系统相册
30 @objc func openPhotoAlbum() 
31 {
32     
33 }
34 
35 //打开相机
36 @objc func ScanQRCode()
37 {
38     
39 }