pageControl query

[cinek]

This is what I have so far for the pageControl. The only issue is that I need to specify what's loaded on a page in 2 places - I'm not sure if I'm doing this correctly. Right now it only works if I use the pageControl "buttons" at the bottom of the screen, swiping to the page doesn't do anything

.m file

static int kNumberOfPages = 2;

#import "MainViewViewController.h"

@implementation MainViewViewController
@synthesize scrollView, pageControl;


//Make sure the pageControl corresponds to the current page
-(void)scrollViewDidScroll:(UIScrollView *)sender{
    if(!pageControlUsed){
        //Switch the indicator when more than 50% of the previous or next page is visible
        CGFloat pageWidth = self.scrollView.frame.size.width;
        int page = floor((self.scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
        self.pageControl.currentPage = page;
        
        if(page == 0){
            NSLog(@"its zero");
        } else if (page == 1){
            NSLog(@"its one");
        }
        
        [self loadPages];
    }
    
    
}

-(void)loadPages
{
    if (pageControl.currentPage == 1){
        NSLog(@"1");
    }
}

-(void)pageTurning:(UIPageControl *)pageController
{
    NSInteger nextPage = [pageController currentPage];
    switch (nextPage){
        case 0:
            scrollView.backgroundColor = [UIColor yellowColor];
            break;
        case 1:
            scrollView.backgroundColor = [UIColor blueColor];
            break;
            default:
            break;
    }
    
}

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    pageControlUsed = NO;
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    pageControlUsed = NO;
}


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    
    [super viewDidLoad];
    
    pageControl.currentPage = 1;
    
    [pageControl addTarget:self action:@selector(pageTurning:) forControlEvents:UIControlEventValueChanged];
    pageControlUsed = NO;
    
    self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * kNumberOfPages, self.scrollView.frame.size.height);
    
    scrollView.delegate = self;
    
    //Control pageControl
    self.pageControl.currentPage = 0;
    self.pageControl.numberOfPages = kNumberOfPages;
    
    
    
    // Do any additional setup after loading the view from its nib.
}

.h file

#import <UIKit/UIKit.h>

@interface MainViewViewController : UIViewController <UIScrollViewDelegate>
{
    IBOutlet UIScrollView *scrollView;
    IBOutlet UIPageControl *pageControl;
    BOOL pageControlUsed;
}

@property (nonatomic, retain) IBOutlet UIScrollView *scrollView;
@property (nonatomic, retain) IBOutlet UIPageControl *pageControl;

[cinek]

changed it around a bit, it now loads the view at page 0 - but when I swipe to change the page, the page number doesn't change, it stays at 0 ;/

[cinek]

this is what I got now

static int kNumberOfPages = 2;

#import "AppDelegate.h"

@implementation AppDelegate

@synthesize window = _window;
@synthesize pageControl, scrollView, viewControllers;

-(IBAction)changePage:(id)sender
{
    pageControlUsed = YES;
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    pageControlUsed = NO;
}

-(void)scrollViewDidScroll:(UIScrollView *)sender
{
    if(pageControlUsed){
        return;
    }
    
    CGFloat pageWidth = scrollView.frame.size.width;
    int page = floor((scrollView.contentOffset.x - pageWidth / 2)/pageWidth) + 1;
    pageControl.currentPage = page;
    
}

-(void)pageTurning:(UIPageControl *)pageController{
    NSInteger nextPage = [pageController currentPage];
    
    switch (nextPage) {
        case 0:
            scrollView.backgroundColor = [UIColor blueColor];
            break;
        case 1:
            scrollView.backgroundColor = [UIColor redColor];
            
        default:
            break;
    }
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * kNumberOfPages, scrollView.frame.size.height);
    scrollView.delegate = self;
    
    [pageControl addTarget:self action:@selector(pageTurning:) forControlEvents:UIControlEventValueChanged];
    
    pageControl.currentPage = 0;
    
    [self pageTurning:pageControl];
    
    //self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    //self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

I think I need to call pageTurning in scrollViewDidScroll - but [self pageTurningageControl]; doesn't work.


Any ideas?