ios - 无法在 NSHomeDirectory 下创建目录

Question

我有代码在 NSHomeDirectory 下创建一个文件夹，但它总是失败，我不明白为什么。它应该可以工作，但它一直说不允许该操作。有什么想法吗？

NSURL *homeURL = [NSURL fileURLWithPath:NSHomeDirectory() isDirectory:YES];
NSURL *previewsURL = [homeURL URLByAppendingPathComponent:@"Previews"];

DebugLog(@"homeURL: %@", homeURL);
DebugLog(@"previewsURL: %@", previewsURL);

BOOL isDirectory = TRUE;
if (![[NSFileManager defaultManager] fileExistsAtPath:previewsURL.path isDirectory:&isDirectory]) {
    DebugLog(@"isDirectory: %@", isDirectory ? @"YES" : @"NO");
    NSAssert(isDirectory, @"Must be a directory");

    NSError *error = nil;
    if (![[NSFileManager defaultManager] createDirectoryAtPath:previewsURL.path withIntermediateDirectories:TRUE attributes:nil error:&error]) {
        DebugLog(@"Error: %@", error); // WHY?!
    }
    else {
        BOOL isDirectory = TRUE;
        BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:previewsURL.path isDirectory:&isDirectory];
        NSAssert(exists, @"Directory must exist");
    }
}

Answer 1

您没有访问 NSHomeDirectory() 的权限，

相反，在文档目录中创建它们

NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0];
NSURL *homeURL = [NSURL fileURLWithPath:documentDirectory isDirectory:YES];
NSURL *previewsURL = [homeURL URLByAppendingPathComponent:@"Previews"];