Using UIPageControl as a container UIViewController(三)
ntroller = [self.childViewControllers objectAtIndex:self.pageControl.currentPage];
UIViewController *newViewController = [self.childViewControllers objectAtIndex:page];
[oldViewController viewWillDisappear:YES];
[newViewController viewWillAppear:YES];
self.pageControl.currentPage = page;
[oldViewController viewDidDisappear:YES];
[newViewController viewDidAppear:YES];
_page = page;
}
}
最后处理旋转
首先在shouldAutorotateToInterfaceOrientation方法中返回 YES，同时也需要传输一下3个消息给当前被显示的子 UIViewController。
[cpp]
willAnimateRotationToInterfaceOrientation:duration:
willRotateToInterfaceOrientation:duration:
didRotateFromInterfaceOrientation:
但我们还是要自己处理旋转的问题，比如要重新缩放scrollview的contentView，以及调整子view的帧率，否则会出现一些无法预料的事情。所以来看看以下处理方式
[cpp]
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
returnYES;
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage];
[viewController willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
_rotating = YES;
}
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage];
[viewController willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];
self.scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * [self.childViewControllers count], scrollView.frame.size.height);
NSUInteger page = 0;
for(viewController in self.childViewControllers) {
CGRect frame = self.scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
viewController.view.frame = frame;
page++;
}
CGRect frame = self.scrollView.frame;
frame.origin.x = frame.size.width * _page;
frame.origin.y = 0;
[self.scrollView scrollRectToVisible:frame animated:NO];
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
_rotating = NO;
UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage];
[viewController didRotateFromInterfaceOrientation:fromInterfaceOrientation];
}
总结