Swift - 启动时的向导页（新手引导）的制作

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

import UIKit

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(application: UIApplication,

        didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        // Override point for customization after application launch.

        //增加标识，用于判断是否是第一次启动应用...

        if (!(NSUserDefaults.standardUserDefaults().boolForKey("everLaunched"))) {

            NSUserDefaults.standardUserDefaults().setBool(true, forKey:"everLaunched")

            var  guideViewController = GuideViewController()

            self.window!.rootViewController=guideViewController;

            println("guideview launched!")

        }

        return true

    }

    func applicationWillResignActive(application: UIApplication) {

    }

    func applicationDidEnterBackground(application: UIApplication) {

    }

    func applicationWillEnterForeground(application: UIApplication) {

    }

    func applicationDidBecomeActive(application: UIApplication) {

    }

    func applicationWillTerminate(application: UIApplication) {

    }

}

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

import UIKit

class GuideViewController:UIViewController,UIScrollViewDelegate

{

    var numOfPages = 3

    override func viewDidLoad()

    {

        var frame = self.view.bounds

        //scrollView的初始化

        var scrollView=UIScrollView()

        scrollView.frame=self.view.bounds

        scrollView.delegate = self

        //为了能让内容横向滚动，设置横向内容宽度为3个页面的宽度总和

        scrollView.contentSize=CGSizeMake(frame.size.width*CGFloat(numOfPages),frame.size.height)

        println("\(frame.size.width*CGFloat(numOfPages)),\(frame.size.height)")

        scrollView.pagingEnabled=true

        scrollView.showsHorizontalScrollIndicator=false

        scrollView.showsVerticalScrollIndicator=false

        scrollView.scrollsToTop=false

        for i in 0..<numOfPages{

            var imgfile = "jianjie\(Int(i+1)).png"

            println(imgfile)

            var image = UIImage(named:"\(imgfile)")

            var imgView = UIImageView(image: image)

            imgView.frame=CGRectMake(frame.size.width*CGFloat(i),CGFloat(0),

                frame.size.width,frame.size.height)

            scrollView.addSubview(imgView)

        }

        scrollView.contentOffset = CGPointZero

        self.view.addSubview(scrollView)

    }

    func scrollViewDidScroll(scrollView: UIScrollView!)

    {

        println("scrolled:\(scrollView.contentOffset)")

        var twidth = CGFloat(numOfPages-1) * self.view.bounds.size.width

        if(scrollView.contentOffset.x > twidth)

        {

            var mainStoryboard = UIStoryboard(name:"Main", bundle:nil)

            var viewController = mainStoryboard.instantiateInitialViewController() as UIViewController

            self.presentViewController(viewController, animated: true, completion:nil)

        }

    }

}