UIPageViewController使用示例

#import "MediumController.h"
#import "PhotoViewController.h"
#import "VideoViewController.h"

@interface MediumController ()<UIPageViewControllerDataSource,UIPageViewControllerDelegate>
{
NSMutableArray *_pageArray;
UIPageViewController *_pageCtrl;
UISegmentedControl *_segCtrl;

//当前页
NSInteger _curPage;
}
@end

@implementation MediumController

- (void)viewDidLoad {
[super viewDidLoad];
[self createTopView];
[self createPageData];
[self createPagrVC];

[self createBackBtn];

self.view.backgroundColor = [UIColor whiteColor];
}
//创建顶部按钮
-(void)createTopView
{
_segCtrl = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"预告片",@"剧照", nil]];
[_segCtrl addTarget:self action:@selector(clickSegCtrl:) forControlEvents:UIControlEventValueChanged];
[_segCtrl setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]} forState:UIControlStateNormal];
[_segCtrl setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor blackColor]} forState:UIControlStateSelected];
[_segCtrl setTintColor:[UIColor whiteColor]];

_segCtrl.frame = CGRectMake(100, 7, kScreenWidth-200, 30);
if (_type == MoviesType) {
_segCtrl.selectedSegmentIndex = 0;
}
else if(_type == PhotoType)
{
_segCtrl.selectedSegmentIndex = 1;
}
self.navigationItem.titleView = _segCtrl;
}
//创建pagecontrol
-(void)createPagrVC
{
NSInteger index = _type;
_pageCtrl = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
_pageCtrl.delegate = self;
_pageCtrl.dataSource = self;
[_pageCtrl setViewControllers:@[_pageArray[index]] direction:UIPageViewControllerNavigationDirectionForward animated:nil completion:nil];
_pageCtrl.view.frame = CGRectMake(0, 0, kScreenWidth, kScreenHeight);
[self.view addSubview:_pageCtrl.view];
}
//创建数据源
-(void)createPageData
{
_pageArray = [NSMutableArray array];
VideoViewController *vvc = [[VideoViewController alloc] init];
vvc.videoArray = _videoArray;
[_pageArray addObject:vvc];
PhotoViewController *pvc = [[PhotoViewController alloc] init];
pvc.photoArray = _photoArray;
[_pageArray addObject:pvc];

}

-(void)clickSegCtrl:(UISegmentedControl *)ctrl
{
NSInteger index = ctrl.selectedSegmentIndex;
[_pageCtrl setViewControllers:@[_pageArray[index]] direction:index<_curPage animated:YES completion:^(BOOL finished){
_curPage = index;
}];
}

#pragma mark --UIPageViewController代理----
-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
NSInteger index = [_pageArray indexOfObject:viewController];
if (index+1 == _pageArray.count) {
return nil;
}
return _pageArray[index+1];
}
-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
NSInteger index = [_pageArray indexOfObject:viewController];
if (index == 0) {
return nil;
}
return _pageArray[index-1];
}

-(void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray *)previousViewControllers transitionCompleted:(BOOL)completed
{
_curPage = [_pageArray indexOfObject:pageViewController.viewControllers[0]];
_segCtrl.selectedSegmentIndex = _curPage;
}

@end