Type 'AnyObject' does not conform to protocol 'SequenceType'

func loadThumbnails() {

let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
let documentsDirectory:NSString = paths[0] as NSString
var error:NSError?
let fileManager = NSFileManager()
let directoryContent:AnyObject = fileManager.contentsOfDirectoryAtPath(documentsDirectory, error: &error)!

thumbnails = [QSPhotoInfo]()

for item:AnyObject in directoryContent {
let fileName = item as NSString
if fileName.hasPrefix(kThumbnailImagePrefix) {
let image = loadImageFromDocumentsDirectory(fileName)
var photoInfo = QSPhotoInfo()
photoInfo.thumbnail = image;
photoInfo.thumbnailFileName = fileName
thumbnails += photoInfo
}
}
}


the compile error is below:
>Type 'AnyObject' does not conform to protocol 'SequenceType'

what does this menas?

who can help me ,thks a lot!!!!

Apple states in [The Swift Programming Language][1]:

> The for-in loop performs a set of statements for each item in a range,
> sequence, collection, or progression.

Right now, `directoryContent` is just conforming to protocol `AnyObject`, so you can't use for loops over it. If you want to do so, you have to do something similar to the following:

for item in directoryContent as [AnyObject] {
//Do stuff
}


[1]:

[To see links please register here]

`contentsOfDirectoryAtPath` returns an `NSArray`, whereas you are casting it to `AnyObject`. The solution is to cast it to either `[AnyObject]?` or `NSArray`:

let directoryContent: [AnyObject]? = fileManager.contentsOfDirectoryAtPath(documentsDirectory, error: &error)

or

let directoryContent: NSArray? = fileManager.contentsOfDirectoryAtPath(documentsDirectory, error: &error)

Then use an optional binding before the for loop:

if let directoryContent = directoryContent {
for item:AnyObject in directoryContent {

Looking at the `contentsOfDirectoryAtPath` documentation, it states it always returns an array - so what said above can be reduced to unwrapping the return value to either a swift or objc array, with no need to use the optional binding:

let directoryContent: [AnyObject] = fileManager.contentsOfDirectoryAtPath(documentsDirectory, error: &error)!

or

let directoryContent: NSArray = fileManager.contentsOfDirectoryAtPath(documentsDirectory, error: &error)!