Can't retrieve data and display in iOS app - php

Question

I'm trying to retrieve simple text data out of my database. When the app runs, you type in whatever you want and it saves it to the database. That part is working. When i log in to phpMyAdmin, that data is there. However, I'm trying to show the data as well, right above the textfield where the user inputs their text. When the app runs, there is nothing there. Here is my code for my retrieve data function. Thank you
func retrieveMessages(latestMessage:String) {
// Specify the URL of our retrieval web service
let url:NSURL = NSURL(string: "http://mypage.com/index.php")!
// Create a NSURLSession task with completion handler
let task:NSURLSessionDataTask = NSURLSession.sharedSession().dataTaskWithURL(url, completionHandler: { (data:NSData?, response:NSURLResponse?, error:NSError?) -> Void in
do {
// Convert the json data into an array
let dataArray:[AnyObject] = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers) as! [AnyObject]
// Clear the messages array
self.messagesArray.removeAll(keepCapacity: false)
// Loop through each dictionary in the array
for data in dataArray {
let dictionary:[String:String] = data as! [String:String]
// Append it to our messages array
if dictionary["Text"] != nil {
self.messagesArray.append(dictionary["Text"]!)
}
}
dispatch_async(dispatch_get_main_queue()) {
// Refresh the table
self.tableView.reloadData()
}
}
catch{}
})
// Run the task
task.resume()
}