Question

所以我到处寻找，似乎无法找到我正在寻找的东西。基本上，我的应用程序中有3个不同的视图控制器。（MainViewController，ChildViewController，TwitterViewController）起初我只是练习使用ChildViewController并更新标签来告诉你在哪个页面。但是，我想在TwitterViewController中添加“Page 2”并将ChildViewController保持为“Page 1”。

目前我将MainViewController设置为Delegate和DataSource，并将代码放回到使用一个“ChildViewController”作为不同的页面。如果此后没有，请告诉我。如果需要，我会尽力重申。以下是我的代码。

的 MainViewController.m 的

#import "MainViewController.h"
#import "ChildViewController.h"
#import "TwitterViewController.h"

@interface MainViewController ()

@end

@implementation MainViewController

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

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

    self.pageController.dataSource = self;
    [[self.pageController view] setFrame:[[self view] bounds]];

    ChildViewController *initialViewController = [self viewControllerAtIndex:0];

    NSArray *viewControllers = [NSArray arrayWithObject:initialViewController];

    [self.pageController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

    [self addChildViewController:self.pageController];
    [[self view] addSubview:[self.pageController view]];
    [self.pageController didMoveToParentViewController:self];

    UIPageControl *pageControl = [UIPageControl appearance];
    pageControl.pageIndicatorTintColor = [UIColor blackColor];
    pageControl.currentPageIndicatorTintColor = [UIColor redColor];

}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController {
    NSUInteger index = [(ChildViewController *)viewController index];

    if (index == 0) {
        return nil;
    }

    index--;

    return [self viewControllerAtIndex:index];
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController {
    NSUInteger index = [(ChildViewController *)viewController index];

    index++;

    if (index == 2) {
        return nil;
    }

    return [self viewControllerAtIndex:index];
}

- (ChildViewController *)viewControllerAtIndex:(NSUInteger)index {
    ChildViewController *first = [[ChildViewController alloc] initWithNibName:@"ChildViewController" bundle:nil];
    first.index = index;

    return first;
}

- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController {
    return 2;
}

- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController {
    return 0;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
@end

的 ChildViewController.m 的

#import "ChildViewController.h"
#import <QuartzCore/QuartzCore.h>

@interface ChildViewController ()

@end

@implementation ChildViewController

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

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.screenNumber.text = [NSString stringWithFormat:@"This is Page #%d", self.index];
    self.screenNumber.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:1];
    self.screenNumber.layer.cornerRadius =10;    
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:YES];

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

TwitterViewController是默认的，尚未编写..暂时尝试使用空白的ViewController。

任何帮助都会很棒!!谢谢你们！

Answer 1

每个视图控制器都需要索引。因此，如果您将UIViewController类创建为基类，它将具有存储索引的属性“index”，那将是一件好事。然后继承此基类以创建ChildViewController和TwitterViewContoller。将方法(ChildViewController *)viewControllerAtIndex:(NSUInteger)index更改为 (BaseViewController *)viewControllerAtIndex:(NSUInteger)index。

在方法内部，根据索引返回适当的视图控制器。

在UIPageViewController中使用2个不同的View Controller作为Pages

1 个答案: