Question

我只是想创建一个安全的用户文件，它将保存基本的登录信息，因此无需在每次启动应用程序时输入。我知道我不能写入bundle，所以我正在尝试我们应该访问的其他目录之一，比如高速缓存，文档和库，这些都没有导致成功写入

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, NO);
    NSString *cacheDirectory = [paths objectAtIndex:0];
    NSLog(@"Found cache directory: %@", cacheDirectory);
    NSString *fileName = [cacheDirectory stringByAppendingPathComponent:@"987f065e4656dba6c"];
    NSString *userData = [[NSString alloc] initWithFormat:@"%@\n%@\n%@", owner.schoolWebsite.text, owner.username.text, owner.password.text];
    NSError *fileError = nil;
    if(!([[NSFileManager defaultManager] createDirectoryAtPath:cacheDirectory withIntermediateDirectories:YES attributes:nil error:&fileError]))
    {
        NSLog(@"Error creating cache directory: %@\n%@\n%@\n%@", [fileError localizedDescription], [fileError localizedFailureReason], [fileError localizedRecoveryOptions], [fileError localizedRecoverySuggestion]);
    }        
    if (!([[NSFileManager defaultManager] createFileAtPath:fileName contents:[userData dataUsingEncoding:NSASCIIStringEncoding] attributes:nil] ) )

    {
        NSLog(@"ERROR WRITING TO FILE: %@\n%@\n%@\n%@", [fileError localizedDescription], [fileError localizedFailureReason], [fileError localizedRecoveryOptions], [fileError localizedRecoverySuggestion]);
    }

这一直困扰着我一段时间，而这只会在设备上失败

Answer 1

尝试替换它：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, NO);

机智：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);

我已将NSLibraryDirectory（/ Library）替换为NSCachesDirectory（/ Library / Cache）。也表示将波浪扩展到完整路径，这可能是这背后的主要原因。

尝试写入普通目录时可可错误513

1 个答案: