UIView 使用 pageControl 滚动到 UIScrollView

Question

我正在尝试使用带有 pageControl 的 UIScrollView 制作一个“说明”窗口，其中包含一些 UIViewController：

- (void)loadScrollViewWithPage:(NSInteger)page {
    if (page < 0 || page >= kNumberOfPages) return;

     switch (page) {
        case 0:
           [[WelcomeViewController alloc] initWithNibName:@"WelcomeViewController" bundle:nil];
             break;
        case 1:            
            [[HomeViewController alloc] initWithNibName:@"HomeViewController" bundle:nil];
            break;
        case 2:
            [[FirstTabViewController alloc] initWithNibName:@"FirstTabViewController" bundle:nil];
            break;
        case 3:
            [[SecondTabViewController alloc] initWithNibName:@"SecondTabViewController" bundle:nil];
            break;

        case 4:
            [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];
            break;
        default:
            [[WelcomeViewController alloc] initWithNibName:@"WelcomeViewController" bundle:nil];
            break;

    }

}

我无法让它工作。

滚动有效，但我无法显示我制作的任何 UIViewController！

我怎样才能让它工作？

Answer 1

听起来您对快速修复而不是正确解决更感兴趣。好的。以下是您的操作方法。

- (void)loadScrollViewWithPage:(NSInteger)page {
    if (page < 0 || page >= kNumberOfPages) return;

    UIViewController * newController = NULL;

     switch (page) {
        case 0:
           newController = (UIViewController *)[[WelcomeViewController alloc] initWithNibName:@"WelcomeViewController" bundle:nil];
             break;
        case 1:            
            newController = (UIViewController *)[[HomeViewController alloc] initWithNibName:@"HomeViewController" bundle:nil];
            break;
        case 2:
            newController = (UIViewController *)[[FirstTabViewController alloc] initWithNibName:@"FirstTabViewController" bundle:nil];
            break;
        case 3:
            newController = (UIViewController *)[[SecondTabViewController alloc] initWithNibName:@"SecondTabViewController" bundle:nil];
            break;
        case 4:
            newController = (UIViewController *)[[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];
            break;
        default:
            newController = (UIViewController *)[[WelcomeViewController alloc] initWithNibName:@"WelcomeViewController" bundle:nil];
            break;
    }

    if(newController)
    {
        // this method is inside a UIScrollView, right?
        [self.contentView addSubview: newController.view];
    }

    // at this point, newController has been alloc'd and retained.  You should either release it next time you enter 
    // into loadScrollViewWithPage (i.e. declare newController as an object in your .h file) or you should 
    // add "autorelease" after all of those initWithNibName calls up there
}

Answer 2

尝试使用 UIPageViewController 并向其中添加许多不同的视图控制器（及其滚动视图）。

http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIPageViewControllerClassReferenceClassRef/UIPageViewControllerClassReference.html

附言UIPageViewController 是 iOS 5 和更新版本。