我有嵌入在一个UINavigationController几个视图控制器（一些模态，一些推），并使用滑动手势作为这样通过它们正在导航：
// Gesture recognizers
UISwipeGestureRecognizer *downGesture = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(dismissButton)];
downGesture.direction = UISwipeGestureRecognizerDirectionDown;
[downGesture setCancelsTouchesInView:NO];
[self.view addGestureRecognizer:downGesture];
这工作得很好，但我希望用户能够物理拖动模态呈现视图控制器，例如，向下和关闭屏幕，而不只是轻弹和动画做休息，或在屏幕右侧拖动和捕捉到以前的观点，而不是叩击背部按钮。
我已经试过这使用移动手势的观点，但当然以前的视图控制器是不是背后可见，它必须执行。 这是如何影响正常实现？ 随着视图控制器遏制？ 如果这样会怎样的工作力推几个视图控制器堆栈是什么时候？ 导航我谈论的类型的例子可以在凸版应用程序被发现。
谢谢。
是的，自定义的容器视图是要走的路（iOS 5及以上）。 你基本上写自己的自定义容器，使用内置childViewControllers属性来跟踪所有子视图控制器的。 您可能希望自己的财产，说currentChildIndex ，跟踪你目前使用的子控制器：
@property (nonatomic) NSInteger currentChildIndex;
你的父母也许控制器应该具有非刷卡与导航相关，比如一些push和pop方法：
- (void)pushChildViewController:(UIViewController *)newChildController
{
// remove any other children that we've popped off, but are still lingering about
for (NSInteger index = [self.childViewControllers count] - 1; index > self.currentChildIndex; index--)
{
UIViewController *childController = self.childViewControllers[index];
[childController willMoveToParentViewController:nil];
[childController.view removeFromSuperview];
[childController removeFromParentViewController];
}
// get reference to the current child controller
UIViewController *currentChildController = self.childViewControllers[self.currentChildIndex];
// set new child to be off to the right
CGRect frame = self.containerView.bounds;
frame.origin.x += frame.size.width;
newChildController.view.frame = frame;
// add the new child
[self addChildViewController:newChildController];
[self.containerView addSubview:newChildController.view];
[newChildController didMoveToParentViewController:self];
[UIView animateWithDuration:0.5
animations:^{
CGRect frame = self.containerView.bounds;
newChildController.view.frame = frame;
frame.origin.x -= frame.size.width;
currentChildController.view.frame = frame;
}];
self.currentChildIndex++;
}
- (void)popChildViewController
{
if (self.currentChildIndex == 0)
return;
UIViewController *currentChildController = self.childViewControllers[self.currentChildIndex];
self.currentChildIndex--;
UIViewController *previousChildController = self.childViewControllers[self.currentChildIndex];
CGRect onScreenFrame = self.containerView.bounds;
CGRect offToTheRightFrame = self.containerView.bounds;
offToTheRightFrame.origin.x += offToTheRightFrame.size.width;
[UIView animateWithDuration:0.5
animations:^{
currentChildController.view.frame = offToTheRightFrame;
previousChildController.view.frame = onScreenFrame;
}];
}
就个人而言，我有这两种方法定义的协议，并确保我的父母控制器配置为符合该协议：
@protocol ParentControllerDelegate <NSObject>
- (void)pushChildViewController:(UIViewController *)newChildController;
- (void)popChildViewController;
@end
@interface ParentViewController : UIViewController <ParentControllerDelegate>
...
@end
然后，当孩子想推一个新的子上，它可以像这样：
ChildViewController *controller = ... // instantiate and configure your next controller however you want to do that
id<ParentControllerDelegate> parent = (id)self.parentViewController;
NSAssert([parent conformsToProtocol:@protocol(ParentControllerDelegate)], @"Parent must conform to ParentControllerDelegate");
[parent pushChildViewController:controller];
当孩子想跳出自行关闭，它可以像这样：
id<ParentControllerDelegate> parent = (id)self.parentViewController;
NSAssert([parent conformsToProtocol:@protocol(ParentControllerDelegate)], @"Parent must conform to ParentControllerDelegate");
[parent popChildViewController];
然后父视图控制器具有平移手势设置，处理用户平移从一个孩子到另一个：
- (void)handlePan:(UIPanGestureRecognizer *)gesture
{
static UIView *currentView;
static UIView *previousView;
static UIView *nextView;
if (gesture.state == UIGestureRecognizerStateBegan)
{
// identify previous view (if any)
if (self.currentChildIndex > 0)
{
UIViewController *previous = self.childViewControllers[self.currentChildIndex - 1];
previousView = previous.view;
}
else
{
previousView = nil;
}
// identify next view (if any)
if (self.currentChildIndex < ([self.childViewControllers count] - 1))
{
UIViewController *next = self.childViewControllers[self.currentChildIndex + 1];
nextView = next.view;
}
else
{
nextView = nil;
}
// identify current view
UIViewController *current = self.childViewControllers[self.currentChildIndex];
currentView = current.view;
}
// if we're in the middle of a pan, let's adjust the center of the views accordingly
CGPoint translation = [gesture translationInView:gesture.view.superview];
previousView.transform = CGAffineTransformMakeTranslation(translation.x, 0.0);
currentView.transform = CGAffineTransformMakeTranslation(translation.x, 0.0);
nextView.transform = CGAffineTransformMakeTranslation(translation.x, 0.0);
// if we're all done, let's animate the completion (or if we didn't move far enough,
// the reversal) of the pan gesture
if (gesture.state == UIGestureRecognizerStateEnded ||
gesture.state == UIGestureRecognizerStateCancelled ||
gesture.state == UIGestureRecognizerStateFailed)
{
CGPoint center = currentView.center;
CGPoint currentCenter = CGPointMake(center.x + translation.x, center.y);
CGPoint offRight = CGPointMake(center.x + currentView.frame.size.width, center.y);
CGPoint offLeft = CGPointMake(center.x - currentView.frame.size.width, center.y);
CGPoint velocity = [gesture velocityInView:gesture.view.superview];
if ((translation.x + velocity.x * 0.5) < (-self.containerView.frame.size.width / 2.0) && nextView)
{
// if we finished pan to left, reset transforms
previousView.transform = CGAffineTransformIdentity;
currentView.transform = CGAffineTransformIdentity;
nextView.transform = CGAffineTransformIdentity;
// set the starting point of the animation to pick up from where
// we had previously transformed the views
CGPoint nextCenter = CGPointMake(nextView.center.x + translation.x, nextView.center.y);
currentView.center = currentCenter;
nextView.center = nextCenter;
// and animate the moving of the views to their final resting points,
// adjusting the currentChildIndex appropriately
[UIView animateWithDuration:0.25
delay:0.0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
currentView.center = offLeft;
nextView.center = center;
self.currentChildIndex++;
}
completion:NULL];
}
else if ((translation.x + velocity.x * 0.5) > (self.containerView.frame.size.width / 2.0) && previousView)
{
// if we finished pan to right, reset transforms
previousView.transform = CGAffineTransformIdentity;
currentView.transform = CGAffineTransformIdentity;
nextView.transform = CGAffineTransformIdentity;
// set the starting point of the animation to pick up from where
// we had previously transformed the views
CGPoint previousCenter = CGPointMake(previousView.center.x + translation.x, previousView.center.y);
currentView.center = currentCenter;
previousView.center = previousCenter;
// and animate the moving of the views to their final resting points,
// adjusting the currentChildIndex appropriately
[UIView animateWithDuration:0.25
delay:0.0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
currentView.center = offRight;
previousView.center = center;
self.currentChildIndex--;
}
completion:NULL];
}
else
{
[UIView animateWithDuration:0.25
delay:0.0
options:UIViewAnimationOptionCurveEaseInOut
animations:^{
previousView.transform = CGAffineTransformIdentity;
currentView.transform = CGAffineTransformIdentity;
nextView.transform = CGAffineTransformIdentity;
}
completion:NULL];
}
}
}
它看起来像你做上下平移，而不是左右摇动，我上面使用，但希望你得到的基本思路。
顺便说一句，在iOS 6中，用户界面你问（使用手势视图之间的滑动），也许可以更有效地利用内置容器控制器，来完成UIPageViewController 。 只需使用的过渡风格UIPageViewControllerTransitionStyleScroll和的导航定位UIPageViewControllerNavigationOrientationHorizontal 。 不幸的是，iOS 5中仅允许页面卷曲的转变，而苹果只介绍您在iOS 6中要滚动的转变，但如果这就是你所需要的， UIPageViewController得到比我在前面已经制定了（你不更有效地完成工作“T做任何定制容器调用，没有文字手势识别的，等等）。
例如，您可以拖动“页面视图控制器”到你的故事板，创建一个UIPageViewController子类，然后在viewDidLoad ，你需要配置的第一页：
UIViewController *firstPage = [self.storyboard instantiateViewControllerWithIdentifier:@"1"]; // use whatever storyboard id your left page uses
self.viewControllerStack = [NSMutableArray arrayWithObject:firstPage];
[self setViewControllers:@[firstPage]
direction:UIPageViewControllerNavigationDirectionForward
animated:NO
completion:NULL];
self.dataSource = self;
然后，你需要定义以下UIPageViewControllerDataSource方法：
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
if ([viewController isKindOfClass:[LeftViewController class]])
return [self.storyboard instantiateViewControllerWithIdentifier:@"2"];
return nil;
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
if ([viewController isKindOfClass:[RightViewController class]])
return [self.storyboard instantiateViewControllerWithIdentifier:@"1"];
return nil;
}
您的实现将改变（至少是不同的类名和不同的故事板标识;我也让页面视图控制器实例在下页的控制器，当用户需要它因为我没有任何保留强引用他们，当我做过渡到其他页面the'll发布...你可以只交替包括启动，然后这些实例before和after套路显然不能实例，而是看看他们在一个数组），但希望你的想法。
但关键的问题是，我没有任何动作代码，没有自定义容器视图控制器代码等简单得多。
