iphone - 将文件从 bundle 复制到文档不起作用(Cocoa 错误 512)
<p><p>我试图简单地将我的 sqlite3 数据库复制到文档目录。我得到一个 <code>Cocoa Error 512</code> 并且我认为它不是一个有效的目录(或类似的东西。</p>
<p>数据库文件位于 XCode 中的 Resources 文件夹中。 (文件名正确)</p>
<p>这是我尝试使用的代码:</p>
<pre><code>-(void) checkAndCreateDatabase
{
BOOL success;
NSFileManager *fileManager = ;
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = ;
//databasePath + databaseName is declared in the header
databaseName = @"WaypointDatabase.sql";
databasePath = ;
success = ;
if(success)
{
NSLog(@"Database exists");
return;
}
else
NSLog(@"Database does not exists");
NSString *databasePathFromApp = [ pathForResource:@"WaypointDatabase" ofType:@"sql"];
if(databasePathFromApp == nil)
{
NSLog(@"ERROR: IT IS NIL");
}
NSError* error = nil;
NSLog(@"Path in bundle:\n%@\n\n", databasePathFromApp);
NSLog(@"Path to copy to:\n%@\n\n", databasePath);
[fileManager copyItemAtPath:databasePathFromApp
toPath:databasePath error:&error];
;
if (error)
{
NSLog(@"%@\n\n", error);
NSLog(@"%@", );
}
}
</code></pre>
<p>我得到的控制台输出是:</p>
<blockquote>
<p>2011-10-30 10:36:13.242 xxxx Database does not exists<br/>
2011-10-30 10:36:13.249 xxxx Path in bundle:<br/>
/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/xxxx.app/WaypointDatabase.sql</p>
<p>2011-10-30 10:36:13.252 xxxx Path to copy to:<br/>
/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/Documents/WaypointDatabase.sql</p>
<p>2011-10-30 10:36:13.268 xxxx Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" UserInfo=0xe8b7cd0 {NSUserStringVariant=(
Copy
), NSFilePath=/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/xxxx.app/WaypointDatabase.sql, NSDestinationFilePath=/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/Documents/WaypointDatabase.sql, NSUnderlyingError=0xe8b7ee0 "The operation couldn’t be completed. Not a directory"}</p>
<p>2011-10-30 10:36:13.272 xxxx {
NSDestinationFilePath = "/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/Documents/WaypointDatabase.sql";
NSFilePath = "/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/xxxx.app/WaypointDatabase.sql";
NSUnderlyingError = "Error Domain=NSPOSIXErrorDomain Code=20 \"The operation couldn\U2019t be completed. Not a directory\"";
NSUserStringVariant = (
Copy
);
}</p>
</blockquote>
<p>我认为这一定与获取目录路径或其他东西有关,但现在已经卡了几天了。</p>
<p><em>请注意,这可以完美运行,并且在模拟器上没有任何错误。</em></p>
<p>我哪里出错了?</p>
<p><strong>[更新]</strong></p>
<p>这可能是因为 <code>Documents</code> 文件夹目录不存在吗?我将如何创建/检查它?</p>
<p><strong>[更新 2]</strong></p>
<p>我已经使用了一些其他测试</p>
<pre><code>NSFileManager *fileManager = ;
NSError *err = nil;
NSArray *dirArr = ;
NSLog(@"~~Contents:\n%@",dirArr);
NSLog(@"~~Error: \n%@",err);
</code></pre>
<p>令人惊讶的是,它给出了 <code>Cocoa Error 256</code> 并且还说“不是目录”。几乎就像 <code>Documents 目录不存在一样。但确实如此,根据</code>NSSearchPathForDirectoriesInDomains`</p>
<p>这是我得到的输出</p>
<blockquote>
<p>2011-10-30 10:59:16.934 xxxx ~~Contents:<br/>
(null)<br/>
2011-10-30 10:59:16.936 xxxx ~~Error:<br/>
Error Domain=NSCocoaErrorDomain Code=256 "The operation couldn’t be completed. (Cocoa error 256.)" UserInfo=0x10052580 {NSUserStringVariant=(
Folder
), NSFilePath=/var/mobile/Applications/FF654016-4257-47BB-99FE-55DB5453BBC6/Documents, NSUnderlyingError=0x10054a50 "The operation couldn’t be completed. Not a directory"}</p>
</blockquote></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>通过在 die info.plist 中设置非标准的 Bundle ID 解决了问题</p>
<p>我为此特定应用使用了 iTunes Connect 中的 Bundle ID。现在一切正常。 </p></p>
<p style="font-size: 20px;">关于iphone - 将文件从 bundle 复制到文档不起作用(Cocoa 错误 512),我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/7941821/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/7941821/
</a>
</p>
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