ios swift 多个界面,viewcontroller应该怎么写呢?

ios swift 多个界面,viewcontroller应该怎么写呢?或者说怎么控制?不用storyboard

你是说不同界面的跳转吗?
跳转可以这样写

         let viewCro = ViewController.init()
        // 假如用xib的话,用下面这句初始化
//        let viewCro = ViewController.init(nibName:nibName, bundle:bundle)
        if (self.navigationController != nil) {
            self.navigationController!.pushViewController(viewCro, animated: true)
        } else {
            self.presentViewController(viewCro, animated: true, completion: nil)
        }

不是跳转,是多个界面,不用storyboard怎么生成?

虽然相隔那么长的时间了,自己也在学习,在说也有很多新手在学习,希望这个代码能帮助学习

在AppDelegate文件下面的 application 方法加上这个代码
//创建window
var window: UIWindow?
window = UIWindow(frame: UIScreen.mainScreen().bounds);
window?.backgroundColor = UIColor.whiteColor();
let mainTabController = MainViewController()
window?.rootViewController = mainTabController;
//显示窗口
window?.makeKeyAndVisible();
return true

---------------------------
新建一个文件名为MainViewController .swift 文件
import UIKit
class MainViewController: UITabBarController {

override func loadView() {
    super.loadView();


    addChildViewControllers();
}

func addChildViewControllers() {
    addChildNavAndTabBar("CartTableViewController",title: "购物车",imageName: "tabbar_cart");
    addChildNavAndTabBar("MemberController",title: "我",imageName: "tabbar_fans");
}
/**
 初始化子控制器

 :param: childControllerName 需要初始化的子控制器
 :param: title           初始化的标题
 :param: imageName       初始化的图片
 */
func addChildNavAndTabBar(childControllerName: String,title:String,imageName:String) {
    //动态获取命名空间
    let namespace = NSBundle.mainBundle().infoDictionary!["CFBundleExecutable"] as! String;

    let cls:AnyClass = NSClassFromString(namespace + "." + childControllerName)!;

    // 告诉编译器真实类型是UIViewController
    let vcCls = cls as! UIViewController.Type;

    let vc = vcCls.init();


    let titleDict: NSDictionary = [NSForegroundColorAttributeName: UIColor(red: 255/255, green: 105/200, blue: 0.0/255, alpha: 1.0)]

    //创建底部导航
    vc.title = title;
    vc.tabBarItem.setTitleTextAttributes(titleDict as? [String : AnyObject], forState: UIControlState.Highlighted)
    vc.tabBarItem.image = UIImage(named: imageName);
    vc.tabBarItem.selectedImage = UIImage(named: imageName + "_highlighted");

    // 创建导航控制器
    let nav = UINavigationController()
    nav.addChildViewController(vc)

    addChildViewController(nav)


}

}