NSUserDefaults不在iOS 8中的应用程序和自定义键盘之间存储值

Question

I'm trying to share data between my application and a custom keyboard extension. I've turned on App Groups in both the main application target and the custom keyboard target. In my main application, I add an object with the following:

NSUserDefaults *userDefaults = [[NSUserDefaults alloc] initWithSuiteName:@"group.mycompany.myapp"];
[userDefaults setObject:someObject forKey:@"KEY"];

Printing out [userDefaults dictionaryRepresentation] in the console reveals that this object has been saved, as does calling [userDefaults objectForKey:@"KEY"].

However, when I try to access this object in the custom keyboard extension:

NSUserDefaults *userDefaults = [[NSUserDefaults alloc] initWithSuiteName:@"group.mycompany.myapp"];
NSString *value = [userDefaults objectForKey:@"KEY"];

The value is nil and a call to [userDefaults dictionaryRepresentation] does not reveal the entry that was saved above. I'm on Xcode 6 beta 3. Any ideas?

UPDATE Fixed in Xcode 6 beta 5

Answer 1

A few probable solutions are:

1. Your app group is not setup correctly, or you are not using the correct group identifier with initWithSuiteName:

2. You have not enabled network access for your keyboard. This document states the following when you have network access disabled for your keyboard (default behavior):

   No shared container with containing app

3. It's a bug.

Answer 2

1. Set

    RequestsOpenAccess = YES; 

2. Settings:

    NSUserDefaults * usrInfo = [[NSUserDefaults alloc] initWithSuiteName:@"myKeyboard"]; [usrInfo setObject:theme.icon forKey:@"themeName"]; // This is the new data; [usrInfo synchronize]; 

3. keyboardChange:

    NSUserDefaults * usrInfo = [[NSUserDefaults alloc] initWithSuiteName:@"myKeyboard"]; [usrInfo synchronize]; NSString * str = [usrInfo objectForKey:@"themeName"]; 

Then you can change the keyboard , for example ,change its background

Answer 3

我认为您的套件名称必须从组开始，并与您制作的容器（ 源 ）匹配。

Answer 4

我发现它必须遵循这种格式：group.com.company.appname - 我有别的东西而且它不起作用。

Answer 5

Your group name (as set in Xcode) has to start with "group" (eg" " group.com.myName.MyApp " (I learned this when creating a group capability since the name field is already populated with "group".) and the NSUserDefaults suiteName has to start with another "group", so "group" is there twice, eg " group.group.com.myName.MyApp "). I learned this by looking at the app's Library/Preferences directory when it was running in the sim. Nothing would appear there unless I used this scheme.

I still haven't been able to get the watch app to see the common group defaults file.