如何在两个UIViewcontrollers之间跳转

Question

I want to jump between two UIViewcontrollers

through swipe action.

Currently, I implemented a UIScrollView , and added UIViewcontrollers (vc1 and vc2) on it, so

On vc1

swipe left : jump to vc2

swipe right : do nothing

On vc2

swipe left : do nothing

swipe right : jump to vc1

But what I want is:

On vc1

swipe left : jump to vc2

swipe right : jump to vc2

On vc2

swipe left : jump to vc1

swipe right : jump to vc1

So, how to achieve?

Answer 1

Try this

Steps:

1. In your view controller Create a UIPageViewController

self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

2. Add your both view controller on UIPageViewController

NSArray *viewControllers = //add your two view controllers in array;

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

3. Set data source and Add UIPageViewController as child view controller

self.pageController.dataSource = self; [self addChildViewController:self.pageController];

Now, You need to implement two methods

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

    NSUInteger index = [(ViewController *)viewController index];

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

    // Decrease the index by 1 to return
    index--;

    return viewControllers[index];//[self viewControllerAtIndex:index];//viewControllerAtIndex

}

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

    NSUInteger index = [(ViewController *)viewController index];

    if (index == 1) {
        return nil;
    }
    index++;

    return viewControllers[index];

}