I'm creating an Instagram like app, and whenever I dismiss the display alert that is displayed when an image or text is missing, it logs me out and logs me back in. How can I make it so that when I click "ok", only the display alert goes away and doesn't log me out? Here is my image posting view control code:
import UIKit
import Parse
import Foundation
class PostViewControllerPage1: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
func displayAlert(title:String, error:String) {
var alert = UIAlertController(title: title, message: error, preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { action in
self.dismissViewControllerAnimated(true, completion: nil)
}))
self.presentViewController(alert, animated: true, completion: nil)
}
var photoSelected:Bool = false
@IBOutlet weak var imageToPost: UIImageView!
@IBAction func chooseImage(sender: AnyObject) {
var image = UIImagePickerController()
image.delegate = self
image.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
image.allowsEditing = false
self.presentViewController(image, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
println("Image selected")
self.dismissViewControllerAnimated(true, completion: nil)
imageToPost.image = image
photoSelected = true
}
@IBOutlet weak var imageDescription: UITextField!
@IBAction func postImage(sender: AnyObject) {
var error = ""
if (photoSelected == false) {
error = "Please select an image to post"
} else if (imageDescription.text == "") {
error = "Please enter a message"
}
if (error != "") {
displayAlert("Cannot Post Image", error: error)
}
else {
var post = PFObject(className: "Post")
post["Title"] = imageDescription.text
post.saveInBackgroundWithBlock{(success: Bool, error: NSError?) -> Void in
if success == false {
self.displayAlert("Could Not Post Image", error: "Please try again later")
} else {
let imageData = UIImagePNGRepresentation(self.imageToPost.image)
let imageFile = PFFile(name: "image.png", data: imageData)
post["imageFile"] = imageFile
post.saveInBackgroundWithBlock{(success: Bool, error: NSError?) -> Void in
if success == false {
self.displayAlert("Could Not Post Image", error: "Please try again later")
} else {
println("posted successfully")
}
}
}
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
What am I doing wrong? Here is my login code, because I feel like that might be a part of the issue:
import Foundation
import Parse
import UIKit
import Bolts
class LoginViewController: UIViewController, UITextFieldDelegate {
@IBOutlet weak var loginStatusLabel: UILabel!
@IBOutlet weak var emailTextField: UITextField!
@IBOutlet weak var passwordTextField: UITextField!
@IBOutlet weak var loginButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
emailTextField.delegate = self
passwordTextField.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func loginButtonPress(sender: AnyObject) {
login(emailTextField.text, password: passwordTextField.text)
}
func login(email: String, password: String)
{
PFUser.logInWithUsernameInBackground(email, password: password)
{
(user: PFUser?, error: NSError?) -> Void in
if user != nil
{
user!.fetchInBackground()
if user!.objectForKey("emailVerified") as! Bool
{
self.loginStatusLabel.text = "Success!"
println("successfulLogin")
self.performSegueWithIdentifier("login", sender: self)
}
else if !(user!.objectForKey("emailVerified") as! Bool)
{
self.loginStatusLabel.text = "Verify your email address!"
}
else // status is "missing"
{
//TODO: Handle this error better
self.loginStatusLabel.text = "Verification status: Missing"
}
}
else
{
if let errorField = error!.userInfo
{
self.loginStatusLabel.text = (errorField["error"] as! NSString) as String
}
else
{
// No userInfo dictionary present
// Help from http://stackoverflow.com/questions/25381338/nsobject-anyobject-does-not-have-a-member-named-subscript-error-in-xcode
}
}
}
}
override func viewDidAppear(animated: Bool) {
if PFUser.currentUser() != nil {
self.performSegueWithIdentifier("login", sender: self)
}
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true;
}
override func viewWillAppear(animated: Bool) {
self.navigationController?.navigationBarHidden = true
}
override func viewWillDisappear(animated: Bool) {
self.navigationController?.navigationBarHidden = false
}
}
