pick image in NewFeedViewController

Yep/ViewControllers/NewFeed/NewFeedViewController.swift

@@ -9,6 +9,7 @@
 import UIKit
 import Proposer
 import CoreLocation
+import MobileCoreServices
 
 class NewFeedViewController: UIViewController {
 
@@ -17,6 +18,23 @@ class NewFeedViewController: UIViewController {
     @IBOutlet weak var messageTextView: UITextView!
     @IBOutlet weak var mediaCollectionView: UICollectionView!
 
+    lazy var imagePicker: UIImagePickerController = {
+        let imagePicker = UIImagePickerController()
+        imagePicker.delegate = self
+        imagePicker.mediaTypes = [kUTTypeImage as String]
+        imagePicker.videoQuality = .TypeMedium
+        imagePicker.allowsEditing = false
+        return imagePicker
+        }()
+
+    var mediaImages = [UIImage]() {
+        didSet {
+            dispatch_async(dispatch_get_main_queue()) { [weak self] in
+                self?.mediaCollectionView.reloadData()
+            }
+        }
+    }
+
     let feedMediaAddCellID = "FeedMediaAddCell"
     let feedMediaCellID = "FeedMediaCell"
 
@@ -65,6 +83,15 @@ class NewFeedViewController: UIViewController {
         }
     }
 
+    override func viewDidAppear(animated: Bool) {
+        super.viewDidAppear(animated)
+
+        // touch to create (if need) for faster appear
+        delay(0.2) { [weak self] in
+            self?.imagePicker.hidesBarsOnTap = false
+        }
+    }
+
     // MARK: Actions
 
     func post(sender: UIBarButtonItem) {
@@ -101,7 +128,7 @@ extension NewFeedViewController: UICollectionViewDataSource, UICollectionViewDel
         case 0:
             return 1
         case 1:
-            return 3
+            return mediaImages.count
         default:
             return 0
         }
@@ -133,4 +160,67 @@ extension NewFeedViewController: UICollectionViewDataSource, UICollectionViewDel
     func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {
         return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 10)
     }
+
+    func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
+
+        switch indexPath.section {
+
+        case 0:
+            let openCameraRoll: ProposerAction = { [weak self] in
+                if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary) {
+                    if let strongSelf = self {
+                        strongSelf.imagePicker.sourceType = .PhotoLibrary
+                        strongSelf.presentViewController(strongSelf.imagePicker, animated: true, completion: nil)
+                    }
+                }
+            }
+
+            proposeToAccess(.Photos, agreed: openCameraRoll, rejected: { [weak self] in
+                self?.alertCanNotAccessCameraRoll()
+            })
+
+        default:
+            break
+        }
+    }
 }
+
+extension NewFeedViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
+
+    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
+
+        if let mediaType = info[UIImagePickerControllerMediaType] as? String {
+
+            if mediaType == (kUTTypeImage as String) {
+
+                if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
+
+                    let imageWidth = image.size.width
+                    let imageHeight = image.size.height
+
+                    let fixedImageWidth: CGFloat
+                    let fixedImageHeight: CGFloat
+
+                    if imageWidth > imageHeight {
+                        fixedImageWidth = min(imageWidth, YepConfig.Media.imageWidth)
+                        fixedImageHeight = imageHeight * (fixedImageWidth / imageWidth)
+                    } else {
+                        fixedImageHeight = min(imageHeight, YepConfig.Media.imageHeight)
+                        fixedImageWidth = imageWidth * (fixedImageHeight / imageHeight)
+                    }
+
+                    let fixedSize = CGSize(width: fixedImageWidth, height: fixedImageHeight)
+
+                    // resize to smaller, not need fixRotation
+
+                    if let fixedImage = image.resizeToSize(fixedSize, withInterpolationQuality: CGInterpolationQuality.Medium) {
+                        mediaImages.append(fixedImage)
+                    }
+                }
+            }
+        }
+        
+        dismissViewControllerAnimated(true, completion: nil)
+    }
+}
+