ios – viewWillAppear在按下主页按钮后再调用,然后再次启动

概述我制作一个测试应用程序并在设备上运行它.在第一次发布时,一切正常.然后我按主页按钮退出,然后按应用程序图标.似乎这次没有调用viewWillAppear.根据我的理解,每次视图显示在屏幕上时都会调用viewWillAppear,无论是由关闭视图控制器还是按下主页按钮然后重新启动它. 根据文件： This method is called before the receiver’s view is 我制作一个测试应用程序并在设备上运行它.在第一次发布时,一切正常.然后我按主页按钮退出,然后按应用程序图标.似乎这次没有调用vIEwWillAppear.根据我的理解,每次视图显示在屏幕上时都会调用vIEwWillAppear,无论是由关闭视图控制器还是按下主页按钮然后重新启动它.解决方法 根据文件：

This method is called before the receiver’s vIEw is about to be added
to a vIEw hIErarchy and before any animations are configured for
showing the vIEw. You can overrIDe this method to perform custom tasks
associated with displaying the vIEw. For example,you might use this
method to change the orIEntation or style of the status bar to
coordinate with the orIEntation or style of the vIEw being presented.
If you overrIDe this method,you must call super at some point in your
implementation.

要获得通知,当您的申请恢复时,您应该使用： – (voID)applicationDIDBecomeActive：(UIApplication *)应用程序此方法在AppDelegate.m中实现

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