Question

我需要以下行为：

用户点击主页按钮，即可将我的应用留在“应用内设置”视图中。然后他/她在iphone设置视图中进行了一些更改，然后再次打开我的应用程序。我需要使用哪种方法添加代码才能在“应用内设置”视图中更新用户界面？

提前致谢

Answer 1

将简历代码放入app delegate .m文件中的- (void) applicationDidBecomeActive:(UIApplication *)application或- (void)applicationWillEnterForeground:(UIApplication *)application函数中。当用户点击主页按钮后你的应用程序再次启动时，将调用此函数

apple的文档更详细地解释了用于某些任务的功能：

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html

Answer 2

将此添加到您的AppDelegate：

- (void)applicationWillEnterForeground:(UIApplication *)application {
    /*
     Called as part of  transition from the background to the active state: here you can undo many of the changes made on entering the background.
     */
}


- (void)applicationDidBecomeActive:(UIApplication *)application {
    /*
    Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
         */
}

viewWillAppear未被调用，因为当应用程序处于后台/暂停时，视图仍然存在。

当应用程序从跳板返回时调用的方法

2 个答案: