wangzhaobin的专栏

<span style="font-size:18px;">一、UIPageViewController概念控件为我们提供了一种像翻书效果的一种控件。我们可以通过使用UIPageViewController控件，来完成类似图书一样的翻页控制方式。二、使用UIPageViewController控件先假象一下，一本书大概可以分为：1.每一页。2.每一页中相应的数据。使用UIPageViewController控件，也是类似的两个构成部分。要有一个书的框架，，来控制页；每一页的内容（一页即为一个对象</span><span style="font-family: Arial, Helvetica, sans-serif;font-size:18px;">）</span><pre name="code" class="objc">1.创建一个ViewController，包含一个UIPageViewController来控制显示，一个NSArray包括所有数据。定义这个ViewController类，并使用UIPageViewController来管理每一页，并提供数据。<span style="font-family: Arial, Helvetica, sans-serif;font-size:18px;"></span>#示例代码PageAppViewController.h @interface PageAppViewController : UIViewController<</span>UIPageViewControllerDataSource>{}@property (strong, nonatomic) UIPageViewController *pageController;//分页控制器@property (strong, nonatomic) NSArray *pageContent;//所有数据数组@endPageAppViewController.m#import "PageAppViewController.h"#import "MoreViewController.h"@interface PageAppViewController ()@end@implementation PageAppViewController@synthesize pageContent=_pageContent;@synthesize pageController=_pageController;- (void)dealloc{[_pageContent release];[_pageController release];[super dealloc];}- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization}return self;}- (void)viewDidLoad{[super viewDidLoad];[self createContentPages];// 初始化所有数据// 设置UIPageViewController的配置项NSDictionary *options =[NSDictionary dictionaryWithObject:[NSNumber numberWithInteger:UIPageViewControllerSpineLocationMin]forKey: UIPageViewControllerOptionSpineLocationKey];// 实例化UIPageViewController对象，根据给定的属性self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options: options];// 设置UIPageViewController对象的代理_pageController.dataSource = self;// 定义“这本书”的尺寸[[_pageController view] setFrame:[[self view] bounds]];// 让UIPageViewController对象，显示相应的页数据。// UIPageViewController对象要显示的页数据封装成为一个NSArray。// 因为我们定义UIPageViewController对象显示样式为显示一页（options参数指定）。// 如果要显示2页，NSArray中，应该有2个相应页数据。MoreViewController *initialViewController =[self viewControllerAtIndex:0];// 得到第一页NSArray *viewControllers =[NSArray arrayWithObject:initialViewController];[_pageController setViewControllers:viewControllersdirection:UIPageViewControllerNavigationDirectionForwardanimated:NOcompletion:nil];// 在页面上，显示UIPageViewController对象的View[self addChildViewController:_pageController];[[self view] addSubview:[_pageController view]];}// 初始化所有数据- (void) createContentPages {NSMutableArray *pageStrings = [[NSMutableArray alloc] init];for (int i = 1; i < 11; i++){NSString *contentString = [[NSString alloc] initWithFormat:@"Chapter %dThis is the page %d of content displayed using UIPageViewController in iOS 5.", i, i];[pageStrings addObject:contentString];}self.pageContent = [[NSArray alloc] initWithArray:pageStrings];}- (void)didReceiveMemoryWarning{[super didReceiveMemoryWarning];// Dispose of any resources that can be recreaviewControllerAtIndexed.}// 得到相应的VC对象- (MoreViewController *)viewControllerAtIndex:(NSUInteger)index {if (([self.pageContent count] == 0) || (index >= [self.pageContent count])) {return nil;}// 创建一个新的控制器类，并且分配给相应的数据MoreViewController *dataViewController =[[MoreViewController alloc] init];dataViewController.dataObject =[self.pageContent objectAtIndex:index];return dataViewController;}// 根据数组元素值，得到下标值- (NSUInteger)indexOfViewController:(MoreViewController *)viewController {return [self.pageContent indexOfObject:viewController.dataObject];}#pragma mark- UIPageViewControllerDataSource// 返回上一个ViewController对象- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController{NSUInteger index = [self indexOfViewController:(MoreViewController *)viewController];if ((index == 0) || (index == NSNotFound)) {return nil;}index–;// 返回的ViewController，将被添加到相应的UIPageViewController对象上。// UIPageViewController对象会根据UIPageViewControllerDataSource协议方法，自动来维护次序。// 不用我们去操心每个ViewController的顺序问题。return [self viewControllerAtIndex:index];}// 返回下一个ViewController对象- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController{NSUInteger index = [self indexOfViewController:(MoreViewController *)viewController];if (index == NSNotFound) {return nil;}index++;if (index == [self.pageContent count]) {return nil;}return [self viewControllerAtIndex:index];}@end#页对象示例代码<pre name="code" class="objc">2.声明页对象，来根据UIPageViewController的调度来显示相应页内容。MoreViewController.h#import@interface MoreViewController : UIViewController<</span>UIWebViewDelegate>{}@property (nonatomic, retain) UIWebView *myWebView;@property (nonatomic, retain) id dataObject;@endMoreViewController.m#import "MoreViewController.h"@implementation MoreViewController@synthesize myWebView=_myWebView;@synthesize dataObject=_dataObject;- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization}return self;}- (void)dealloc{[_myWebView release];[super dealloc];}- (void) loadView{[super loadView];self.myWebView = [[UIWebView alloc] initWithFrame:self.view.bounds];}- (void)viewDidLoad{[super viewDidLoad];}- (void) viewWillAppear:(BOOL)paramAnimated{[super viewWillAppear:paramAnimated];[self.myWebView loadHTMLString:_dataObject baseURL:nil];[self.view addSubview:self.myWebView];}- (void) viewWillDisappear:(BOOL)paramAnimated{}@end三、总结所有代码都已经写完了。其中也，写了相关的备注。着重了解一下关键代码：1.UIPageViewControllerDataSource协议该协议主要有两个方法：- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController;- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController;分别，用来提供UIPageViewController对象的数据源。也就是说，UIPageViewController对象通过该方法来调度显示的内容。当然，别忘了设置：_pageController.dataSource = self;你懂的！2.初始化时，显示适当内容MoreViewController *initialViewController =[self viewControllerAtIndex:0];// 得到第一页NSArray *viewControllers =[NSArray arrayWithObject:initialViewController];[_pageController setViewControllers:viewControllersdirection:UIPageViewControllerNavigationDirectionForwardanimated:NOcompletion:nil];// 在页面上，显示UIPageViewController对象的View[self addChildViewController:_pageController];[[self view] addSubview:[_pageController view]];3.数据必须先准备好。[self createContentPages];// 初始化所有数据希望对你有所帮助！

原来和文字沾上边的孩子从来都是不快乐的，