Question

我正在尝试在用户点按表格行时将页面添加到UIPageViewController，然后同时跳转到UIPageViewController中的新页面。我使用以下代码，但没有按照愿望运行。

TableViewController类中的代码：

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {     

    let pageRootController=self.storyboard!.instantiateViewControllerWithIdentifier("PageRootViewController") as! PageRootViewController        

    switch indexPath.section {
    case O:
        addNewCity(hotCityList[indexPath.row])
        var savedCityArray = getCityList()

        pageRootController.pageControlAppearance()
        pageRootController.createPageViewController()
        pageRootController.presentationCountForPageViewController(pageController)
        pageRootController.presentationIndexForPageViewController(pageController)

    var newViewController = pageRootController.getItemController(savedCityArray.count-1)
    presentViewController(newViewController!, animated: true, completion: nil)      

    default:
        addNewCity("N/A CITY")
    }
}

PageRootViewController中的代码：

func getItemController(itemIndex: Int) -> PageContentViewController? {
    var userCityArray = getCityList()

    if itemIndex < userCityArray.count{
        let PageContentController=self.storyboard!.instantiateViewControllerWithIdentifier("PageContentController") as! PageContentViewController

    //code to configure PageContentController

        return PageContentController
    }
    return nil
}

private var pageViewControlelr: UIPageViewController?
func createPageViewController(){
    let pageController=self.storyboard!.instantiateViewControllerWithIdentifier("PageViewController") as! UIPageViewController
    pageController.dataSource=self

    var userCityArray = getCityList()
    if userCityArray.count>0 {
        let firstController=getItemController(0)!
        let startingViewControllers: NSArray = [firstController]
        pageController.setViewControllers(startingViewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)
    }
    pageViewControlelr=pageController
    addChildViewController(pageViewControlelr!)
    self.view.addSubview(pageViewControlelr!.view)
    pageViewControlelr!.didMoveToParentViewController(self)
}

func pageControlAppearance() {
    //configure pageControl Appearance
}

func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
    //delegate method
}

func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
    //delegate method
}

func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
    var userCityArray = getCityList()
    return userCityArray.count
}

func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
    return 0
}

func getCityList () -> NSMutableArray {
let paths=NSSearchPathForDirectoriesInDomains(
    NSSearchPathDirectory.DocumentDirectory,
    NSSearchPathDomainMask.UserDomainMask,
    true)
let docDir: String=paths[0] as! String
let filePath: String = docDir.stringByAppendingPathComponent("savedCity.txt")

if !NSFileManager.defaultManager().fileExistsAtPath(filePath){
    NSFileManager.defaultManager().createFileAtPath(filePath, contents: nil, attributes: nil)
    var savedCityArray:NSMutableArray=[""]
    savedCityArray[0]=""
    savedCityArray.writeToFile(filePath,atomically:true)
}
var savedCityArray: NSMutableArray = NSMutableArray(contentsOfFile: filePath)!
return savedCityArray
}

当我点按表格行时，预设3个城市，getCityList()方法更新为4个城市，即使在pageRootController.presentationCountForPageViewController(pageController)，但UIPageControl dots仍保持不变3，如果我退出应用程序（不在后台暂停），然后重新启动，则UIPageControl dots更新为4.但我希望当用户点击表格行时，点会立即更新为4。
另外我很困惑如何跳转到新添加的页面视图，表格行中的方法不正确，因为它只是跳转到UIViewController，而不是添加的UIPageViewController。

非常感谢您提前！

如何以编程方式将页面添加到现有UIPageController？

0 个答案: