xcode NSFileManager 不创建文件夹
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NSFileManager doesn't create folder
提问by iWheelBuy
- (NSURL *) applicationDocumentsDirectory
{
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
....
....
NSURL *folder = [[[Database sharedInstance] applicationDocumentsDirectory] URLByAppendingPathComponent:@"temp"];
BOOL isFolder;
NSLog(@"URL: %@", folder);
if ([[NSFileManager defaultManager] fileExistsAtPath:folder.absoluteString isDirectory:&isFolder] == NO)
{
NSLog(@"IsFolder: %d", isFolder);
[[NSFileManager defaultManager] createDirectoryAtURL:folder withIntermediateDirectories:YES attributes:nil error:&error];
if (error)
NSLog(@"Error: %@", error.localizedDescription);
}
I run this part of code twice.
我运行这部分代码两次。
I expect that the folder will be created, but every time I receive a log: "IsFolder: 7".
我希望文件夹会被创建，但每次我收到一个日志：“IsFolder: 7”。
Why the folder wasn't created after the first run?
为什么第一次运行后没有创建文件夹？
回答by iWheelBuy
The problem was in folder.absoluteString.
问题出在folder.absoluteString.
It should be folder.pathinstead.
应该是这样folder.path。
回答by Deepesh
Please, replace folder.absoluteString to folder, your problem will be solved.
请将 folder.absoluteString 替换为文件夹，您的问题将得到解决。
Follow step by step:
循序渐进：
1) Get documents folder
1) 获取文档文件夹
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentsDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
2) Get documents folder and folder name
2) 获取文档文件夹和文件夹名称
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"MyFolder"];
3) Check alerdy exists or not
3）检查alerdy是否存在
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]){
NSError* error;
if( [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error])
else
{
NSLog(@"[%@] ERROR: attempting to write create MyFolder directory", [self class]);
NSAssert( FALSE, @"Failed to create directory maybe out of disk space?");
}
