Ios UIPageViewController页面指示器不同步

使用此UIPageViewController脚本快速来回滑动时，我的UIPageViewController的页面指示器不同步：

target.dragFromToForDuration({x:10, y:100}, {x:300, y:114}, 0.5);
target.dragFromToForDuration({x:300, y:100}, {x:10, y:114}, 0.5);

一遍又一遍地重复

或者，在页面控制器上点击一个方向并按此问题中的另一个方向时：

解决方案是用UIPageControl替换页面指示器。该解决方案在这里也被接受：

返回UIViewController的代码（UIViewController包含具有不同数据源的表）：

-（MyViewController*）viewControllerAtIndex:（NSInteger）索引
{
MyViewController*pageContentViewController=[[MyViewController alloc]initWithNibName:@“MyView”捆绑包：nil]；
id myDataSource=[self.myDataSources objectAtIndex:index]；
[pageContentViewController设置myDataSource:myDataSource]；
返回页面内容视图控制器；
}
#pragma标记-页视图控制器数据源
-（UIViewController*）页面视图控制器：（UIPageViewController*）页面视图控制器视图控制器预览控制器：（UIViewController*）视图控制器
{
id myDataSource=[（（MyViewController*）viewController）myDataSource]；
NSInteger索引=[self.myDataSources索引对象：myDataSource]；
if（index==NSNotFound | | index-1<0）{
返回零；
}否则{
MyViewController*pageContentViewController=[自视图控制器索引：索引-1]；
返回页面内容视图控制器；
}
}
-（UIViewController*）pageViewController:（UIPageViewController*）pageViewController viewControllerAfterViewController:（UIViewController*）viewController
{
MyDataSource*MyDataSource=[（（MyViewController*）viewController）MyDataSource]；
NSInteger索引=[self.myDataSources索引对象：myDataSource]；
if（index==NSNotFound | | index+1>=[self.myDataSources count]）{
返回零；
}否则{
MyViewController*pageContentViewController=[self-viewControllerAtIndex:index+1]；
返回页面内容视图控制器；
}
返回零；
}

是什么导致UIPageViewController和页面指示器不同步？

请检查我的答案：

- (MyViewController*) viewControllerAtIndex:(NSUInteger)index
{
    MyViewController *pageContentViewController = [[MyViewController alloc] initWithNibName:@"MyView" bundle:nil];

    id myDataSource = [self.myDataSources objectAtIndex:index];
    [pageContentViewController setMyDataSource:myDataSource];

    return pageContentViewController;
}

#pragma mark - Page View Controller Data Source

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
    id myDataSource = [((MyViewController*) viewController) myDataSource];
    NSInteger index = [self.myDataSources indexOfObject:myDataSource];

    if (index == NSNotFound || index - 1 < 0) {
        return nil;
    } else {
        MyViewController *pageContentViewController = [self viewControllerAtIndex:index - 1];
        return pageContentViewController;
    }
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
    MyDataSource *myDataSource = [((MyViewController*) viewController) myDataSource];
    NSInteger index = [self.myDataSources indexOfObject:myDataSource];

    if (index == NSNotFound || index + 1 >= [self.myDataSources count]) {
        return nil;
    } else {
        MyViewController *pageContentViewController = [self viewControllerAtIndex:index + 1];
        return pageContentViewController;
    }

    return nil;
}