Question

我试图在用户库目录中创建一个文件夹，但它没有创建。以下代码中是否有任何错误。

databaseName = @"KITSMAW0051_DB.sqlite";
// Get the path to the documents directory and append the databaseName
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
NSString *folder = @"Swasstik";
databasePath = [[documentsDir stringByAppendingPathComponent:folder ] stringByAppendingPathComponent:databaseName];

Answer 1

Ok首先，databasePath描述了文件的路径，而不是目录。但是，假设你真的想在用户的库中创建“Swasstik”文件夹：

// Your code
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
NSString *folder = @"Swasstik";
// I edited here to keep only the folder
NSString *folderPath = [documentsDir stringByAppendingPathComponent:folder];

// At this point we got the path to the folder
// but we want to actually go on and create it
// NSFileManager to the rescue!
NSFileManager *manager = [NSFileManager defaultManager];
[manager createDirectoryAtPath: folderPath
 withIntermediateDirectories: NO
 attributes: nil
 error: nil];

当然你可以study并根据需要设置管理器，并实现一些错误处理。我希望这是有道理的......

Answer 2

databaseName = @"KITSMAW0051_DB.sqlite";
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
NSString *folder = [documentsDir stringByAppendingPathComponent:@"Swasstik"];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error = nil;
if (![fileManager fileExistsAtPath:folder]) {
    [fileManager createDirectoryAtPath:folder withIntermediateDirectories:YES attributes:nil error:&error];
}
if (error != nil) {
    NSLog(@"Some error: %@", error);
    return;
}
NSString *databasePath = [folder stringByAppendingPathComponent:databaseName];

如何在mac中的NSLibraryDirectory中创建文件夹

2 个答案: