Question

我有一个加载子视图的UIPageViewController，我希望每次在页面视图控制器上加载子视图时运行动画到目前为止视图正确加载但动画无效这是我的代码

内容视图类

import UIKit

class ContentPage1ViewController: UIViewController {
    @IBOutlet weak var houseImage: UIImageView!
    @IBOutlet weak var houseImage2: UIImageView!

override func viewDidLoad() {
    println("content view loaded")//THIS WORKS

    self.houseImage.alpha = 0
    self.houseImage.frame = CGRectMake(0, 20, 0, 0)


    UIView.animateWithDuration(1, delay: 0, usingSpringWithDamping: 0.3, initialSpringVelocity: 0, options: .CurveEaseInOut | .Repeat, animations: {

        self.houseImage.alpha = 1
        self.houseImage.frame = CGRectMake(0, 0, 0, 0)

    }, completion: nil)

    super.viewDidLoad()
    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

UIPageViewController

import UIKit

class PageViewController1:         UIPageViewController,UIPageViewControllerDataSource {

var pageTitles:NSArray!
var pageViewController:UIPageViewController!
var index:Int = 1

override func viewDidLoad() {
    //Storyboard id of content pages
    self.pageTitles = NSArray(objects:"PAGE1","PAGE2")
    self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("onboardingPageViewController") as! UIPageViewController
    self.pageViewController.dataSource = self
    var startVc = self.storyboard?.instantiateViewControllerWithIdentifier("contentViewController1") as! UIViewController
    var viewControllers = NSArray(object: startVc)
    self.pageViewController.setViewControllers(
        viewControllers as NSArray as [AnyObject], direction: .Forward, animated: true, completion: nil)

    self.addChildViewController(self.pageViewController)
    self.view.addSubview(self.pageViewController.view)
    self.pageViewController.didMoveToParentViewController(self)


    super.viewDidLoad()
    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func getContentAtIndex(index:Int)->UIViewController{
   return self.storyboard?.instantiateViewControllerWithIdentifier("contentViewController\(index)") as! UIViewController
}

func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
    if(index == NSNotFound)
    {
        return nil
    }

    if(index == self.pageTitles.count)
    {
        return nil
    }
    index++

    return getContentAtIndex(index)

}

func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {

    if(index == 1 || index == NSNotFound)
    {
        return nil
    }

    index--
    return getContentAtIndex(index)
}

func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
    return self.pageTitles.count
}

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

Answer 1

首先，在viewDidLoad中，超级调用super.viewDidLoad()属于该方法的开头，而不是最后。然后插入：

override func viewDidAppear() {
        super.viewDidAppear();
        self.houseImage.alpha = 0
        self.houseImage.frame = CGRectMake(0, 20, 0, 0)


        UIView.animateWithDuration(1, delay: 0, usingSpringWithDamping: 0.3, initialSpringVelocity: 0, options: .CurveEaseInOut | .Repeat, animations: {

               self.houseImage.alpha = 1
               self.houseImage.frame = CGRectMake(0, 0, 0, 0)

        }, completion: nil)
}

UIPageController不显示动画的子视图

1 个答案: