Question

In this tutorial，是否可以只在第一个视图中添加一个按钮，即index == 0？如果是，怎么样？

Answer 1

在页面内容视图控制器中，有一个名为pageIndex（NSUInteger）的属性。

在制作新内容页面时，网页浏览控制器会设置此属性。

所以，让我们说你有2个内容页面，然后第一个页面的pageIndex属性为0，下一个属性为1。您所要做的就是检查pageIndex是否等于0（意味着它是第一个内容页面）并实现该页面的按钮。

假设你知道如何制作一个按钮，在页面内容视图控制器中放置它而不是你当前的viewDidLoad：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    if(self.indexNumber == 0) {
       // code to make your button.
    }
}

Answer 2

在MainViewController.m文件中

- (void)viewDidLoad
 {

 //PageView Controller Code
  UIPageViewController  *pageVcObject = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

    pageVcObject.dataSource = self;
    pageVcObject.delegate = self;

    CGRect frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height-100);
//    [pageVcObject.view setFrame:self.view.bounds];
    [pageVcObject.view setBackgroundColor:[UIColor clearColor]];
    [pageVcObject.view setFrame:frame];
    ChildVcForPageViewController *initialViewController = [self viewControllerAtIndex:0];

    NSArray *viewControllers = [NSArray arrayWithObject:initialViewController];
    [pageVcObject setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];

    [self addChildViewController:pageVcObject
     ];
    [[self view] addSubview:[pageVcObject view]];
    [pageVcObject didMoveToParentViewController:self];
}

#pragma mark - UIPageViewControllerDataSource方法

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(ChildVcForPageViewController *)viewController

{


    NSInteger index = [viewController index];
     pageControl.currentPage = index;
    index++;



    if (index == imagesArray.count)
        return nil;
    else
    {

        return [self viewControllerAtIndex:index];
    }



}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(ChildVcForPageViewController *)viewController

{

    NSInteger index = [viewController index];
    pageControl.currentPage = index;

    if (index == 0) return nil;

    index--;


    return [self viewControllerAtIndex:index];
}

- (ChildVcForPageViewController *)viewControllerAtIndex:(NSUInteger)indexValue
        {
            ChildVcForPageViewController *childViewController = [[ChildVcForPageViewController alloc] init];

            childViewController.index = indexValue;

            return childViewController;
        }

在ChildVcForPageViewController.h中声明如下属性

@property (assign, nonatomic) NSInteger index;

然后在ChildVcForPageViewController.m文件中添加代码

- (void)viewDidLoad 

{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    if(self.index == 0) {
       // code to make your button.

UIButton *buttonz = [UIButton buttonWithType:UIButtonTypeCustom];
        buttonz.frame = CGRectMake(160, 0, 160, 30);
        [buttonz setTitle:@"Charge" forState:UIControlStateNormal];
        [buttonz addTarget:self action:@selector(myAction:) forControlEvents:UIControlEventTouchUpInside];


        //add the button to the view
        [backImageView addSubview:buttonz];
    }
}

将按钮添加到使用uipageviewcontroller创建的视图

2 个答案: