i have an issue in document directory - swift

Question

i have problem when i want to making folder in document directory
when i making the folder first time like folder (Hello) and when i try to make another folder like (hello) in small letter not anything doing and the folder not creating i don't know why ? but if i try to making the folder (hello ) with small space it is ok and it is display it on the table view i don't know why and if any one can check the folder hello and Hello is different
please help
the following is the code
#IBAction func btnMakeFolder(sender: AnyObject) {
var checkFoundAlbum:Bool = false // for check the folder if is found it or not
let c = NSCharacterSet.whitespaceCharacterSet()
if folderNameTextField.text?.stringByTrimmingCharactersInSet(c) != "" {
let fileManager = NSFileManager.defaultManager()
do {
let document = try fileManager.URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: false)
// her i check the album is he exists or not
let getFolders = try fileManager.contentsOfDirectoryAtURL(document, includingPropertiesForKeys: nil, options: .SkipsHiddenFiles)
for folder in getFolders {
if folder.lastPathComponent!.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet()) == folderNameTextField.text!.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet()){
checkFoundAlbum = true
}else {
checkFoundAlbum = false
}
}
// her for create folder and display the alert for the user
if checkFoundAlbum == false{
let folderUrl = document.URLByAppendingPathComponent(folderNameTextField.text!)
try fileManager.createDirectoryAtURL(folderUrl, withIntermediateDirectories: true, attributes: nil)
self.dismissViewControllerAnimated(true, completion: nil)
}else {
let alertController = UIAlertController(title: "Album Exists", message: "This Album Already Exists,Please Change The Name", preferredStyle: .Alert)
let alertAction = UIAlertAction(title: "OK", style: .Default, handler: { (alertAction:UIAlertAction) in
})
alertController.addAction(alertAction)
self.presentViewController(alertController, animated: true, completion: nil)
}
}catch {
print(error)
}
}else {
alert()
}
}

Answer 1

I suggest to try this code on an actual device – the iOS simulator is usually not case sensitive assuming the underlying filesystem of the simulator uses HFS+.