NSUserDefaults有时会保存详细信息，也不会有其他时间 [英] NSUserDefaults saves details sometimes and doesn't someother times

问题描述

我使用NSUserDefaults在本地保存一些数据。但是问题是它不会一直保存数据。

I use NSUserDefaults to save some data locally. But the problem is it doesn't save the data all the times.

例如：

虽然应用程序崩溃我使用NSUserDefaults保存与execption相关的信息

While an app is crashing I save the execption related informations using NSUserDefaults

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  NSSetUncaughtExceptionHandler(&onUncaughtException);

}

void onUncaughtException(NSException* exception)
{
 //save exception related details using NSuserdefaults
}

推荐答案

问题是你必须 / code> thne NSUserDefaults 同时崩溃。因为你没有这样做，异常细节消失

The problem is that you have to synchronize thne NSUserDefaults while crashing.Since you are not doing that, the exception details disappear

在应用终止时调用同步方法：

Call the synchronize method on app termination:

- (void)applicationWillTerminate:(UIApplication *)application
{
       [[NSUserDefaults standardUserDefaults] synchronize];
}

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