iphone - 将文件夹(带内容)从 bundle 复制到文档目录 - iOS

Question

编辑:已解决

谢谢布鲁克斯。你的问题让我继续深入研究该文件是否存在于我的包中 - 但它不存在!

因此，通过使用此代码(也在下方):iPhone/iPad:无法将文件夹从 NSBundle 复制到 NSDocumentDirectory 以及将目录正确添加到 Xcode 的说明(来自 here 及以下)我能够让它工作。

将文件夹复制到 Xcode 中:

1. 在您的 Mac 上创建一个目录。
2. 选择将现有文件添加到您的项目
3. 选择要导入的目录
4. 在弹出窗口中确保选择“将项目复制到 目标组的文件夹”和“为任何创建文件夹引用 添加文件夹”
5. 点击“添加”

6. 目录应显示为蓝色而不是黄色。

   -(void) copyDirectory:(NSString *)directory {
   NSFileManager *fileManager = [NSFileManager defaultManager];
   NSError *error;
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
   NSString *documentsDirectory = [paths objectAtIndex:0];
   NSString *documentDBFolderPath = [documentsDirectory stringByAppendingPathComponent:directory];
   NSString *resourceDBFolderPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:directory];
   
   if (![fileManager fileExistsAtPath:documentDBFolderPath]) {
       //Create Directory!
       [fileManager createDirectoryAtPath:documentDBFolderPath withIntermediateDirectories:NO attributes:nil error:&error];
   } else {
       NSLog(@"Directory exists! %@", documentDBFolderPath);
   }
   
   NSArray *fileList = [fileManager contentsOfDirectoryAtPath:resourceDBFolderPath error:&error];
   for (NSString *s in fileList) {
       NSString *newFilePath = [documentDBFolderPath stringByAppendingPathComponent:s];
       NSString *oldFilePath = [resourceDBFolderPath stringByAppendingPathComponent:s];
       if (![fileManager fileExistsAtPath:newFilePath]) {
           //File does not exist, copy it
           [fileManager copyItemAtPath:oldFilePath toPath:newFilePath error:&error];
       } else {
           NSLog(@"File exists: %@", newFilePath);
       }
   }
   

======================== 结束编辑

Frus-stray-shee-on!无论如何...

下面的代码将我的文件夹从应用程序包复制到模拟器中的 Documents 文件夹就可以了。但是在设备上出现错误并且没有文件夹。使用 ze Google 我发现错误 (260) 表示文件(在本例中是我的文件夹)不存在。

可能出了什么问题？为什么我不能将我的文件夹从 bundle 复制到文档？我已经检查过文件是否存在——尽管文件夹没有显示——因为 Xcode 想要平面文件？它是否将我的文件夹(拖到 Xcode 中)变成了 Assets 的平面文件？

感谢您的帮助。

//  Could not copy report at path /var/mobile/Applications/3C3D7CF6-B1F0-4561-8AD7-A367C103F4D7/cmsdemo.app/plans.gallery to path /var/mobile/Applications/3C3D7CF6-B1F0-4561-8AD7-A367C103F4D7/Documents/plans.gallery. error Error Domain=NSCocoaErrorDomain Code=260 "The operation couldn’t be completed. (Cocoa error 260.)" UserInfo=0x365090 {NSFilePath=/var/mobile/Applications/3C3D7CF6-B1F0-4561-8AD7-A367C103F4D7/cmsdemo.app/plans.gallery, NSUnderlyingError=0x365230 "The operation couldn’t be completed. No such file or directory"}

NSString *resourceDBFolderPath;

NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory,
                                                     NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *documentDBFolderPath = [documentsDirectory stringByAppendingPathComponent:@"plans.gallery"];
BOOL success = [fileManager fileExistsAtPath:documentDBFolderPath];

if (success){
    NSLog(@"Success!");
    return;
} else {
    resourceDBFolderPath = [[[NSBundle mainBundle] resourcePath]
                                      stringByAppendingPathComponent:@"plans.gallery"];
    [fileManager createDirectoryAtPath: documentDBFolderPath attributes:nil];
    //[fileManager createDirectoryAtURL:documentDBFolderPath withIntermediateDirectories:YES attributes:nil error:nil];

    [fileManager copyItemAtPath:resourceDBFolderPath toPath:documentDBFolderPath           
                          error:&error];
}

    //check if destinationFolder exists
if ([ fileManager fileExistsAtPath:documentDBFolderPath])
{
    //removing destination, so source may be copied
    if (![fileManager removeItemAtPath:documentDBFolderPath error:&error])
    {
        NSLog(@"Could not remove old files. Error:%@",error);
        return;
    }
}
error = nil;
//copying destination
if ( !( [ fileManager copyItemAtPath:resourceDBFolderPath toPath:documentDBFolderPath error:&error ]) )
{
    NSLog(@"Could not copy report at path %@ to path %@. error %@",resourceDBFolderPath, documentDBFolderPath, error);
    return ;
}

Answer 1

我冒昧地编辑了一些我认为需要一些整理的代码。您正在使用已弃用的方法、过于复杂的方法，以及非常荒谬的 if-elses。我当然会检查你的文件路径是否有效，不知道 .gallery 文件是什么，也没有尝试提供一个虚拟文件，我唯一能做的判断就是你的文件路径是无效的，因为资源没有'存在于你认为它存在的地方。 (有一次，您要求将文件复制到文档目录中，然后检查它是否存在于您的包中!)

    -(void)testMethod {

    NSString *resourceDBFolderPath;

    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory,
                                                         NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *documentDBFolderPath = [documentsDirectory stringByAppendingPathComponent:@"plans.gallery"];
    BOOL success = [fileManager fileExistsAtPath:documentDBFolderPath];

    if (success){
        NSLog(@"Success!");
        return;
    } 
    else {
        //simplified method with more common and helpful method 
        resourceDBFolderPath = [[NSBundle mainBundle] pathForResource:@"plans" ofType:@"gallery"];

        //fixed a deprecated method
        [fileManager createDirectoryAtPath:documentDBFolderPath withIntermediateDirectories:NO attributes:nil error:nil];

        [fileManager copyItemAtPath:resourceDBFolderPath toPath:documentDBFolderPath           
                              error:&error];

        //check if destinationFolder exists
        if ([ fileManager fileExistsAtPath:documentDBFolderPath])
        {
            //FIXED, another method that doesn't return a boolean.  check for error instead
            if (error)
            {
                //NSLog first error from copyitemAtPath
                NSLog(@"Could not remove old files. Error:%@", [error localizedDescription]);

                //remove file path and NSLog error if it exists.
                [fileManager removeItemAtPath:documentDBFolderPath error:&error];
                NSLog(@"Could not remove old files. Error:%@", [error localizedDescription]);
                return;
            }
        }
    }
}