containerURLForSecurityApplicationGroupIdentifier获取nil值

问题描述

我正在制作两个与一个文件通信的iPad应用程序，并从一个文件中获取所有数据。我搜索并找到这个containerURLForSecurityApplicationGroupIdentifier，我们可以在其中创建组和存储。我写了下面的代码。在授权文件中，我写

I am making two iPad app that communicate with one file and fetches all the data from one file. I search and find this "containerURLForSecurityApplicationGroupIdentifier" we can create group and store in that. I have write the code below. In entitlement file i write

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>com.apple.security.app-sandbox</key>
       <true/>
     <key>com.apple.security.application-groups</key>
     <array>
        <string>$(TeamIdentifierPrefix)com.xxx.catalogapp.Coredata</string>
     </array>
    <key>keychain-access-groups</key>
    <array>
        <string>$(AppIdentifierPrefix)com.xxx.catalogapp.Coredata</string>
    </array>
</dict>
</plist>

在Code i中写这个

And in Code i write this

NSFileManager* fileManager = [NSFileManager defaultManager];
NSURL* storeUrl = [fileManager
containerURLForSecurityApplicationGroupIdentifier:@"com.xxx.catalogapp.Coredata"];
NSLog(@"%@", storeUrl);

但是storeUrl我得到 nil 值。

But storeUrl I am getting nil value.

推荐答案

Xcode6（目前处于测试阶段）强制共享文件夹ID以group开头。

Xcode6 (currently in beta) enforces the shared folder IDs to start with "group."

分享我的CoreData商店适合我使用以下网址，Xcode6 / iOS8都是测试版。

Sharing my CoreData store works for me with the following URL with Xcode6/iOS8 both beta.

NSFileManager* fileManager = [NSFileManager defaultManager];
NSURL* storeUrl = [fileManager containerURLForSecurityApplicationGroupIdentifier:@"group.XXX"];

看来，只要Xcode6发布，stevesliva链接的文档就会过时

It seems the documentation that stevesliva linked will be obsolete as soon as Xcode6 will be released

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