创建几个类，用来之后显示标签栏上的按钮，并改下背景色
Paste_Image.png
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window?.makeKeyAndVisible()
let firstCtrl = ViewController()
//设置导航控制器
let navCtrl = UINavigationController(rootViewController: firstCtrl)
navCtrl.tabBarItem.title = "第一页"
// navCtrl.tabBarItem.image = UIImage(named: "1.png")?.imageWithRenderingMode(.AlwaysOriginal)
//设置图标背景图，默认蓝色，改为原始颜色显示
firstCtrl.tabBarItem.image = UIImage(named: "1.png")?.imageWithRenderingMode(.AlwaysOriginal)
// firstCtrl.tabBarItem.selectedImage 选中后图片
firstCtrl.tabBarItem.badgeValue = "5"
firstCtrl.tabBarItem.title = "First"
let secondCtrl = Second()
secondCtrl.tabBarItem.title = "Second"
let thirdCtrl = Third()
thirdCtrl.tabBarItem.title = "Third"
let fourthCtrl = Fourth()
fourthCtrl.tabBarItem.title = "Fourth"
let fivthCtrl = Fivth()
fivthCtrl.tabBarItem.title = "Fivth"
let tabCtrl = UITabBarController()
tabCtrl.viewControllers = [navCtrl,secondCtrl,thirdCtrl,fourthCtrl,fivthCtrl]
self.window?.rootViewController = tabCtrl
return true
}
在 ViewContrller中编辑导航栏属性，我们给它设置点击屏幕跳转到第二个页面的功能。
编译运行，如下图：
Paste_Image.png
Paste_Image.png
Paste_Image.png
Paste_Image.png
Paste_Image.png
可以直接点击标签栏上的按钮，直接跳转到对应的界面。
