How to populate UITableView with Data from Core Data - ios

Question

I created a function wich should save single elements of text the user types in a textField as Strings to a Entity in the CoreData:
#IBAction func tappedAddButton(sender: AnyObject) {
var appDel:AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
var context:NSManagedObjectContext = appDel.managedObjectContext!
var newExercises = NSEntityDescription.insertNewObjectForEntityForName("Exercises", inManagedObjectContext: context ) as NSManagedObject
newExercises.setValue(textField.text,forKey:"exercises")
context.save(nil)
}
No I wonder how to load the information back right to populate a tableView Cell with it.
In the past I used NSUserDefaults where I could load back a variable an use it without any further code in the functions for displaying them - I just have to call the variables.
How does this work while working with CoreData?
I want the data to be displayed after clicking the button and while the View is loading. Every String should be displayed in another Cell using the reuseIdentifier "Cell".
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return exercises.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier(self.cellIdentifier) as UITableViewCell
...
return cell
}
I also would be really thankful for any further informations / links / videos - since I'm new to Swift.