UIPageViewController-浅析
@interface PageAppViewController :UIViewController<</span>UIPageViewControllerDataSource>{
}
@property (strong, nonatomic) UIPageViewController *pageController;
@property (strong, nonatomic) NSArray *pageContent;
@end
#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:[NSNumbernumberWithInteger: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:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:NO
completion: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 %d
This 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
MoreViewController.h
#import
@interface MoreViewController : UIViewController<</span>UIWebViewDelegate>{
}
@property (nonatomic, retain) UIWebView *myWebView;
@property (nonatomic, retain) id dataObject;
@end
#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
- (UIViewController *)pageViewController:(UIPageViewController*)pageViewController viewControllerBeforeViewController:(UIViewController*)viewController;
- (UIViewController *)pageViewController:(UIPageViewController*)pageViewController viewControllerAfterViewController:(UIViewController*)viewController;
MoreViewController *initialViewController =[self viewControllerAtIndex:0];// 得到第一页
NSArray *viewControllers =[NSArray arrayWithObject:initialViewController];
[_pageController setViewControllers:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:NO
completion:nil];
// 在页面上，显示UIPageViewController对象的View
[self addChildViewController:_pageController];
[[self view] addSubview:[_pageController view]];
[self createContentPages];// 初始化所有数据
