UIPageControl中的问题 [英] problem in UIPageControl

问题描述

pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(153,356,38,36) ]; 

pageControl.userInteractionEnabled =YES;
pageControl.numberOfPages = 2; 
pageControl.currentPage = 1;
pageControl.enabled = TRUE;
[pageControl setHighlighted:YES];

[pageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:pageControl];
}
- (IBAction) changePage:(id)sender 
{


}

我正在以编程方式创建页面控件，并且希望在单击页面控件时显示新的视图控制器.我需要如何实现此changePage方法?有人可以帮忙吗?

I'm programmatically creating page control and i want to display new view controllers on click of page control. How i need to implement this changePage method? Can anyone help?

推荐答案

编写更改页面方法的最简单方法是:

The easiest way to program a method to change pages would be the following:

- (IBAction)changePage:(id)sender {
    CGrect frame;
    frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage;
    frame.origin.y = 0;
    frame.size = self.scrollView.frame.size;
    [self.scrollView scrollRectToVisible:frame animated:YES];
}

如果您只是想通过单击点来简单地更改视图控制器，则需要设置页面，以便主视图在底部具有UIPageControl，在上方具有另一个UIView(我们将其称为controllerView)它占据了屏幕的大部分，但没有覆盖页面控件.

if you are trying to simply change the view controller by clicking the dots, you will need to set your page up so that the main view has a UIPageControl at the bottom and another UIView (we will call this controllerView) above it taking up most of the screen, but not overlaying the page control.

您还将在头文件中使用 PageOne * pageOneController; 和 PageTwo * pageTwoController; .这将有助于防止内存泄漏.

You will also want PageOne *pageOneController; and PageTwo *pageTwoController; in your header file. This will help prevent memory leaks.

因此，当您选择其他页面时，将调用 changePage 方法

So when you select another page, you'll call your changePage method

- (IBAction)changePage:(id)sender {
    if (sender.currentPage == 1) {
        // make sure only one instance exists at a time so there aren't any memory leaks;
        if (pageOneController != nil) {
            pageOneController = nil;
            [pageOneController release];
        }
        // load up page one;
        pageOneController = [[PageOne alloc] initWithNibName:@"PageOneNib" bundle:nil];
        // set this as the primary view;
        controllerView = viewController.view;
    } else {
        // do the same for your other page;
    }
}

这应该为您解决问题

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