NSFileManager.defaultManager().removeItemAtPath removes file only once app terminates - swift

Question

So I am using the methods bellow to handle getting, deleting, and saving images for my app. When I call removeImage it succeeds and when I use NSFileManager.defaultManager().fileExistsAtPath it says the file does not exist. However, when I call getImage it can still grab the image even though it has been deleted. When I quite the app and start it up again getImage works as expected until I use removeImage. I have also tried wrapping the removeImage call in dispatch_async(dispatch_get_main_queue(),{}) and it still doesn't work.
My code:
class func removeImage(user:User){
let context = getManagedObjectContext()
context.performBlockAndWait({
guard let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true) as [String]! where paths.count > 0 else{
return
}
do{
if let dirPath = paths[0] as String!{
let path = "\(user.id)_\(user.name).png"
let readPath = (dirPath as NSString).stringByAppendingPathComponent(path)
try NSFileManager.defaultManager().removeItemAtPath(readPath)
}
}catch{
}
})
}
class func saveImage(user:User,image:UIImage){
let path = "\(user.id)_\(user.name).png"
guard let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true) as [String]! where paths.count > 0 else{
return
}
if let dirPath = paths[0] as String!{
let writePath = (dirPath as NSString).stringByAppendingPathComponent(path)
UIImagePNGRepresentation(image)!.writeToFile(writePath, atomically: true)
}
}
class func getImage(user:User)->UIImage?{
let path = "\(user.id)_\(user.name).png"
guard let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true) as [String]! where paths.count > 0 else{
return nil
}
if let dirPath = paths[0] as String!{
let readPath = (dirPath as NSString).stringByAppendingPathComponent(path)
return UIImage(named: readPath)
}
return nil
}
UPDATE/FIX! Changed code to this and it worked:
class func removeImage(user:User){
let manager = NSFileManager.defaultManager()
do{
let directoryURL = try manager.URLForDirectory(.DocumentationDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
if #available(iOS 9.0, *) {
let url = NSURL(fileURLWithPath: "\(user.id)_\(user.name).png", relativeToURL: directoryURL)
try manager.removeItemAtURL(url)
} else {
let url = directoryURL.URLByAppendingPathComponent("\(user.id)_\(user.name).png")
try manager.removeItemAtURL(url)
}
}catch{
}
}
class func saveImage(user:User,image:UIImage){
let manager = NSFileManager.defaultManager()
do{
let directoryURL = try manager.URLForDirectory(.DocumentationDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
if #available(iOS 9.0, *) {
let url = NSURL(fileURLWithPath: "\(user.id)_\(user.name).png", relativeToURL: directoryURL)
UIImagePNGRepresentation(image)!.writeToURL(url, atomically: true)
} else {
let url = directoryURL.URLByAppendingPathComponent("\(user.id)_\(user.name).png")
UIImagePNGRepresentation(image)!.writeToURL(url, atomically: true)
}
}catch{
}
}
class func getImage(user:User)->UIImage?{
let manager = NSFileManager.defaultManager()
do{
let directoryURL = try manager.URLForDirectory(.DocumentationDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
if #available(iOS 9.0, *) {
let url = NSURL(fileURLWithPath: "\(user.id)_\(user.name).png", relativeToURL: directoryURL)
if let data = NSData(contentsOfURL: url){
return UIImage(data: data)
}
} else {
let url = directoryURL.URLByAppendingPathComponent("\(user.id)_\(user.name).png")
if let data = NSData(contentsOfURL: url){
return UIImage(data: data)
}
}
}catch{
}
return nil
}