IOS SegmentedControl利用addChildViewController切换UIViewController

先上效果图

Paste_Image.png

Paste_Image.png

首先定义3个UIViewController

//全局变量
    var chatVC:UIViewController!  //第一个
    var friendVC:UIViewController!  //第二个
    var currentVC:UIViewController! //公共变量

在viewDidLoad中初始化Controller

override func viewDidLoad() {
        super.viewDidLoad()
        //根据storyboard获取  建议 Identifier名称与文件名相同
        chatVC = self.storyboard?.instantiateViewControllerWithIdentifier("KIMListViewController") as! KIMListViewController
        self.addChildViewController(chatVC)
        friendVC = self.storyboard?.instantiateViewControllerWithIdentifier("KFriendTableViewController") as! KFriendTableViewController
        self.view.addSubview(chatVC.view)
        currentVC = chatVC
    }

然后拖拽一个SegmentedControl事件方法

@IBAction func ChangeVC(sender: AnyObject) {
        let seg = sender as! UISegmentedControl
        switch seg.selectedSegmentIndex{
        case 0:
            self.replaceController(oldController: currentVC, newController: chatVC)
            break
        case 1:
            self.replaceController(oldController: currentVC, newController: friendVC)
            break
        default:break
        }
    }

这里需要一个公共方法来切换Controller

func replaceController(oldController oldController:UIViewController,newController:UIViewController)
    {

        //判断同意Controller不执行切换操作
        if oldController == newController {return}
        self.addChildViewController(newController)
        
        /**
        *   着重介绍一下它
        *  transitionFromViewController:toViewController:duration:options:animations:completion:
        *  fromViewController   当前显示在父视图控制器中的子视图控制器
        *  toViewController  将要显示的姿势图控制器
        *  duration    动画时间(这个属性,old friend 了 O(∩_∩)O)
        *  options     动画效果(渐变,从下往上等等,具体查看API)
        *  animations     转换过程中得动画
        *  completion     转换完成
        */
        self.transitionFromViewController(oldController, toViewController: newController, duration: 0.2, options:.TransitionNone, animations: nil) { (finished:Bool) -> Void in
            if finished{
                newController.didMoveToParentViewController(self)
                oldController.willMoveToParentViewController(nil)
                oldController.removeFromParentViewController()
                self.currentVC = newController
            }else{
                self.currentVC = oldController
            }
        }
    }

运行 就可以看到效果啦,大家可以试试

转载修改:http://www.tuicool.com/articles/3ymMzub