UIPageViewController基本使用
@interface ViewController ()<UIPageViewControllerDelegate,UIPageViewControllerDataSource> @property(nonatomic,strong)UIPageViewController *pageVC;
@property(nonatomic,strong)NSMutableArray *dataArr;
@end @implementation ViewController -(NSMutableArray *)dataArr{
if(!_dataArr){
_dataArr = [NSMutableArray array];
[_dataArr addObject:[MyViewController new]];
[_dataArr addObject:[MyViewController new]];
[_dataArr addObject:[MyViewController new]];
}
return _dataArr;
} - (void)viewDidLoad {
[super viewDidLoad]; self.pageVC.view.bounds = CGRectMake(0, 0,SCREEN_WIDTH, SCREEN_HEIGHT); }
-(UIPageViewController *)pageVC{
if(!_pageVC){
_pageVC = [[UIPageViewController alloc]initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
_pageVC.delegate = self; _pageVC.dataSource = self; [self addChildViewController:_pageVC];
[self.view addSubview:_pageVC.view];
[_pageVC didMoveToParentViewController:self];
[_pageVC setViewControllers:@[self.dataArr[0]] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
}
return _pageVC;
}
#pragma mark UIPageViewControllerDelegate
- (void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray<UIViewController *> *)previousViewControllers transitionCompleted:(BOOL)completed{ } #pragma mark UIPageViewControllerDataSource
- (nullable UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController{
NSInteger currentPage = [self.dataArr indexOfObject:viewController];
if(currentPage <= 0){
return nil;
}else{
currentPage --;
return self.dataArr[currentPage];
}
}
- (nullable UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController{
NSInteger currentPage = [self.dataArr indexOfObject:viewController]; if(currentPage >= self.dataArr.count - 1){
return nil;
}else{
currentPage ++;
return self.dataArr[currentPage];
}
}