UITabbarController左右滑动切换标签页
每个Tabbar ViewController都要添加如下代码，建议在基类中添加：
ViewDidLoad
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedRightButton:)];
[swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft];
[self.view addGestureRecognizer:swipeLeft];
UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedLeftButton:)];
[swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];
[self.view addGestureRecognizer:swipeRight];
再添加2个函数，包含切换动画效果：
- (IBAction) tappedRightButton:(id)sender
{
NSUInteger selectedIndex = [self.tabBarController selectedIndex];
NSArray *aryViewController = self.tabBarController.viewControllers;
if (selectedIndex < aryViewController.count - 1) {
UIView *fromView = [self.tabBarController.selectedViewController view];
UIView *toView = [[self.tabBarController.viewControllers objectAtIndex:selectedIndex + 1] view];
[UIView transitionFromView:fromView toView:toView duration:0.5f options:UIViewAnimationOptionTransitionFlipFromRight completion:^(BOOL finished) {
if (finished) {
[self.tabBarController setSelectedIndex:selectedIndex + 1];
}
}];
}
}
- (IBAction) tappedLeftButton:(id)sender
{
NSUInteger selectedIndex = [self.tabBarController selectedIndex];
if (selectedIndex > 0) {
UIView *fromView = [self.tabBarController.selectedViewController view];
UIView *toView = [[self.tabBarController.viewControllers objectAtIndex:selectedIndex - 1] view];
[UIView transitionFromView:fromView toView:toView duration:0.5f options:UIViewAnimationOptionTransitionFlipFromLeft completion:^(BOOL finished) {
if (finished) {
[self.tabBarController setSelectedIndex:selectedIndex - 1];
}
}];
}
}