
addChildVIEwController(svc)svc.dIDMovetoParentVIEwController(self)vIEw.addSubvIEw(svc.vIEw)
并且我尝试删除Safari VIEw控制器与以下代码:
svc.willMovetoParentVIEwController(nil)svc.vIEw.removeFromSupervIEw()svc.removeFromParentVIEwController()
现在我可以预加载URL并显示Safari视图没有问题.然而,在我重复这个过程(预加载/显示/删除)几次(大概30次)后,应用程序将因为某些内存问题而崩溃,因为日志显示内存级别不正常或者该应用程序在应用程序被jetsam杀死崩溃.
在崩溃之前,我看到一些关于可能的泄漏警告的日志:
<Warning>: notify name "UIKeyboardSpringBoardKeyboardShow" has been registered 20 times - this may be a leak<Warning>: notify name "com.apple.SafariVIEwService-com.apple.uikit.vIEwService.connectionRequest" has been registered 20 times - this may be a leak
删除Safari VIEw控制器时是否正确进行?我错过了什么吗?还是解决这个问题的任何建议?
解决方法 如果您添加子视图控制器代码如上所述,那么我认为它的顺序应该与文档有所不同.addChildVIEwController(svc)vIEw.addSubvIEw(svc.vIEw)svc.dIDMovetoParentVIEwController(self)
您应该首先添加子视图,然后调用dIDMovetoParentVIEwController.尝试这个,看看它是否有效.
总结Listing 5-1Adding a child vIEw controller to a container
(voID) displayContentController: (UIVIEwController*) content { [self addChildVIEwController:content]; content.vIEw.frame = [self
frameForContentController]; [self.vIEw
addSubvIEw:self.currentClIEntVIEw]; [content
dIDMovetoParentVIEwController:self]; }In the preceding example,notice that you call only the
dIDMovetoParentVIEwController: method of the child. That is because
the addChildVIEwController: method calls the child’s
willMovetoParentVIEwController: method for you. The reason that you must call the dIDMovetoParentVIEwController: method yourself is that the method cannot be called until after you embed the child’s vIEw into your container’s vIEw hIErarchy.
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