ios - 将资源 plist 文件复制到应用程序支持文件夹？

Question

有什么方法可以将 plist 文件复制到 iOS 中的 Application Support 文件夹？

下面的方法返回 Application Support 文件夹路径，但我需要将资源 plist 文件复制到该文件夹​​中。而不是使用 CopyItemAtUrl 方法，然后从包中删除。

- (NSURL*)applicationDataDirectory {

    NSFileManager* sharedFM = [NSFileManager defaultManager];

    NSArray* possibleURLs = [sharedFM URLsForDirectory:NSApplicationSupportDirectory
                                             inDomains:NSUserDomainMask];
    NSURL* appSupportDir = nil;
    NSURL* appDirectory = nil;

    if ([possibleURLs count] >= 1) {
        // Use the first directory (if multiple are returned)
        appSupportDir = [possibleURLs objectAtIndex:0];
    }

    // If a valid app support directory exists, add the
    // app's bundle ID to it to specify the final directory.

    if (appSupportDir) {
        NSString* appBundleID = [[NSBundle mainBundle] bundleIdentifier];
        appDirectory = [appSupportDir URLByAppendingPathComponent:appBundleID];
    }

    return appDirectory;
}

Answer 1

框架返回 Application Support 文件夹的正确路径，但与 Documents 文件夹不同，它不是默认创建的。

使用能够隐式创建文件夹的 NSFileManager 的替代 API

- (NSURL*)applicationDataDirectory {

    NSFileManager* sharedFM = [NSFileManager defaultManager];
    NSURL* appSupportDir = [sharedFM URLForDirectory:NSApplicationSupportDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:YES error:nil];
    // add the app's bundle ID to it to specify the final directory.

    NSString* appBundleID = [[NSBundle mainBundle] bundleIdentifier];
    return [appSupportDir URLByAppendingPathComponent:appBundleID];
}

请注意，您也有责任创建子文件夹。

- (NSURL*)applicationDataDirectory {

    NSFileManager* sharedFM = [NSFileManager defaultManager];
    NSURL* appSupportDir = [sharedFM URLForDirectory:NSApplicationSupportDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:YES error:nil];
    // add the app's bundle ID to it to specify the final directory.

    NSString* appBundleID = [[NSBundle mainBundle] bundleIdentifier];
    NSURL* appDirectory = [appSupportDir URLByAppendingPathComponent:appBundleID];
    if (![appDirectory checkResourceIsReachableAndReturnError:nil]) {
        [sharedFM createDirectoryAtURL:appDirectory withIntermediateDirectories:NO attributes:nil error:nil];
    }
    return appDirectory;
}