UISplitViewController学习笔记(iOS8)

UISplitVIEwController iOS8 iOS 转载至：https://www.zybuluo.com/zhangyuhangk/note/137390


Storyboard如下： 

iOS8加入了size classes，并且允许iPhone上使用UISplitVIEwController。 
当水平方向的size class为Compact时，split vIEw显示为合并 
当水平方向的size class为Regular时，split vIEw显示为展开 
可以使用iPhone6 Plus模拟器来运行，因为它竖屏的时候是Compact，横屏的时候是Regular。只要转一下就可以切换了，比较方便（以下均以iPhone6 Plus模拟器为例）。

合并和展开的时候会触发哪些事件或方法呢？

先设置delegate

                func application(application: UIApplication, dIDFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { splitVIEwControler.delegate = self return true}

实现UISplitVIEwControllerDelegate

                                                             extension AppDelegate: UISplitVIEwControllerDelegate { func splitVIEwController(splitVIEwController: UISplitVIEwController, collapseSecondaryVIEwController secondaryVIEwController: UIVIEwController, ontoprimaryVIEwController primaryVIEwController: UIVIEwController) -> Bool { if some_condition { return false // collapse } return true // do not collapse } func splitVIEwController(splitVIEwController: UISplitVIEwController, separateSecondaryVIEwControllerFromPrimaryVIEwController primaryVIEwController: UIVIEwController) -> UIVIEwController? { if some_condition { return MySecondaryVIEwController() } return nil }}

split vIEw controller合并时会调用splitVIEwController:collapseSecondaryVIEwController:ontoprimaryVIEwController函数。如果不实现该函数或者返回false，则secondary vIEw controller会合并到primary vIEw controller上去。若返回true，则表示你自己处理了这个合并的行为，系统就不会再合并了。 
展开时则调用splitVIEwController:separateSecondaryVIEwControllerFromPrimaryVIEwController函数。若不实现该函数或返回nil，则将原来合并到primary vIEw controller上的secondary vIEw controller拆分出来。 
split vIEw默认是展开的状态，当应用以竖屏启动时，系统会在显示前就作一次合并的动作。

        func collapseSecondaryVIEwController(secondaryVIEwController: UIVIEwController, forSplitVIEwController splitVIEwController: UISplitVIEwController)func separateSecondaryVIEwControllerForSplitVIEwController(splitVIEwController: UISplitVIEwController) -> UIVIEwController?

                                                     extension AppDelegate: UINavigationControllerDelegate { func navigationController(navigationController: UINavigationController, willShowVIEwController vIEwController: UIVIEwController, animated: Bool) { UIVIEw.animateWithDuration(0.25) { let secondaryNavigationController = vIEwController as? UINavigationController self.applycolorFromNavigationController(secondaryNavigationController, toNavigationController: navigationController) } } private func applycolorFromNavigationController(fromVC: UINavigationController?, toNavigationController toVC: UINavigationController) { toVC.navigationbar.TitleTextAttributes = fromVC?.navigationbar.TitleTextAttributes toVC.navigationbar.tintcolor = fromVC?.navigationbar.tintcolor }}