UIAlertAction's handler doesn't work - ios

Question

I'm new to swift and now following a tutorial book. The book is kind outdated, and I had this bug.
Basically I'm trying to do a table cell selection, after I selected the cell it should pop up a menu and then I can hit the call button. However, right now after I hit the call button, the expected alter box doesn't show up, and the compiler gives me the error: Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior
There is no bug when I edit the code, it just doesn't run correctly.
Another problem is that I have about 17 rows on the table, the stimulator's screen only shows 7 and I can't scroll down to see the rest of them.
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath:NSIndexPath){
//this creates an option menu when you tap on the row
let optionMenu = UIAlertController(title: nil, message: "What do you want to do?", preferredStyle: .ActionSheet)
//this is what happened after you hit the cancel option
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
//defines the action after tap on the call option
let nocallAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
let callActionHandler = {(action:UIAlertAction!)-> Void in
let alertMessage = UIAlertController(title: "Service Unavaliable", message: "Sorry, the call is not avaliable yet, please retry later.", preferredStyle: .Alert)
alertMessage.addAction(nocallAction)
}
//this is what happened after you hit the call option
let callAction = UIAlertAction(title: "Call " + "123-000-\(indexPath.row)", style:
UIAlertActionStyle.Default, handler: callActionHandler)
//this is what happened after you hit the been there option
let isVisitedAction = UIAlertAction(title: "I've been here", style: .Default, handler: {
(action:UIAlertAction!) -> Void in
let cell = tableView.cellForRowAtIndexPath(indexPath)
cell?.accessoryType = .Checkmark
})
//add the action to the option menu
optionMenu.addAction(isVisitedAction)
optionMenu.addAction(callAction)
optionMenu.addAction(cancelAction)
self.presentViewController(optionMenu, animated: true, completion: nil)
}

Answer 1

You never present the view controller in the callActionHandler - it should look like this:
let callActionHandler = {(action:UIAlertAction!)-> Void in
let alertMessage = UIAlertController(title: "Service Unavaliable", message: "Sorry, the call is not avaliable yet, please retry later.", preferredStyle: .Alert)
alertMessage.addAction(nocallAction)
self.presentViewController(alertMessage, animated: true, completion: nil)
}
Swift also allows you to create the completion handler at the same time as the UIAlertAction, which I think is more readable:
let callAction = UIAlertAction(title: "Call " + "123-000-243534", style: UIAlertActionStyle.Default)
{ action in
let alertMessage = UIAlertController(title: "Service Unavaliable", message: "Sorry, the call is not avaliable yet, please retry later.", preferredStyle: .Alert)
alertMessage.addAction(nocallAction)
self.presentViewController(alertMessage, animated: true, completion: nil)
}