Importing Camera Roll Image to UIView background - ios

A small warning: I'm a complete noob at swift
Im creating a small app that (will eventually) allow a user to draw over an image they choose from their camera roll on their iPhone. However, im having some trouble getting the image to be set as the background to the UIView (drawView). Could someone give me some pointers as to how I could go about this? The code I have scraped together is shown below.
My ViewController File:
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet var drawView : AnyObject!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
imagePicker.delegate = self
#IBAction func clearTapped() {
var theDrawView: DrawView = drawView as! DrawView
theDrawView.lines = []
theDrawView.setNeedsDisplay()
}
let imagePicker = UIImagePickerController()
#IBAction func importImage(sender: AnyObject) {
imagePicker.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
imagePicker.allowsEditing = true
self.presentViewController(imagePicker, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]){
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
drawView.backgroundImage = pickedImage
}
func dismissViewControllerAnimated(true, completion: nil)
}
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
dismissViewControllerAnimated(true, completion: nil)
}
}
}
Also, my drawView has a separate swift file that deals with how the lines are drawn in it by the user.

you're going to want to separate your code a little more. right now, it seems like you're trying to create a controller within a controller. implement a class that is a subclass of UIIMagePickerController with the necessary delegate (you already have the code, so just copy and paste):
class MyImagePicker: UIImagePickerController, UIImagePickerControllerDelegate {
}
then in your view controller, initialize your image picker:
let myImagePicker = MyImagePicker()
call the correct method to return the image, set the background image of your UIView to that image, and then add that view as a subview:
drawView.backgroundImage = pickedImage
self.addSubview(pickedImage)
hope that works!

Related

UIImagePickerController to import Image

i want import image in ios from library but i have error
value of type 'viewcontroller' has no member 'present'
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func Alert(sender: AnyObject) {
let nextController = UIImagePickerController()
self.present(nextController, animated: true, completion: nil)
}}
Here's my stripped working code. I use two pickers - one for camera, one for library - because of some odd iOS bug with tint color. To avoid "massive view controller" issues, I tend to move everything possible related to a a UIImagePickerController into a separate file and extension.
class OpenViewController: UIViewController {
let pickerLibrary = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
pickerLibrary.delegate = self
}
}
extension OpenViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#objc func showImagePicker() {
pickerLibrary.allowsEditing = false
pickerLibrary.sourceType = .photoLibrary
present(pickerLibrary,
animated: true,
completion: nil)
pickerLibrary.popoverPresentationController?.sourceView = self.view
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: false, completion: nil)
}
}
While the present code looks correct, I notice several things you didn't post in your code. Maybe because you just didn't post it, but I would definitely check these things:
Are you setting ViewController to be a delegate?
Are you setting ViewController.view to be the source view? This may not be needed for iPhone, but definite helps with iPad.
Have you includes everything needed to be working for UIImagePickerControllerDelegate, UINavigationControllerDelegate?
Now as your error suggests, something else is likely the issue - a UIViewController can present another view controller. In this case you've given us no way to duplicate that error. In other words, I'm assuming that (1) You are seeing a UIButton attached to Alert() - BTW, Swift conventions use lower case for that - and (2) You've proven that when that button is tapped, `Alert() is actually executed.

Function created, but never called, yet it is still executed

I am very new to iOS development and Swift, so sorry if this is a trivial question. I have the following code
import UIKit
class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
var imagePicker: UIImagePickerController!
#IBOutlet weak var imageView: UIImageView!
#IBAction func openGalery(_ sender: UIButton) {
if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary;
imagePicker.allowsEditing = true
present(imagePicker, animated: true, completion: nil)
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
imagePicker.dismiss(animated: true, completion: nil)
imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
}
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.
}
}
In the code I create the func imagePickerController. imagePickerController is responsible for setting the selected image in the imageView. It works. I open the galery, I select an image and there is a transition back to the view with the image set. However, why is it working? I never call the function imagePickerController. Comparing this with the languages I worked before, I should call this function on tap of the select button in the PhotoLibrary. Like an event or something. But here it is somehow called automatically, only by defining the function. Why is that?
imagePicker.delegate = self
Translates to: "Hey imagePicker, when something happens, let me know by calling my UIImagePickerControllerDelegate methods!"
In particular, your implementation of imagePickerController(_:didFinishPickingMediaWithInfo:) is being called, which is part of the UIImagePickerControllerDelegate protocol.
It's delegation pattern.
When you set imagePicker's delegate to self, you're starting receiving events from picker.
Events defined in protocol. In this case it's UIImagePickerControllerDelegate
This pattern frequently using in iOS developing.
More about delegation pattern you can read in Apple's documentation

XCode 8.3.2 Storyboard UI elements won't appear in simulator

disclaimer: I've found a number of these questions but none of them helped.
Just like the title says, the storyboard UI elements for my CarDetailViewController won't appear in the simulator, but they do in other view controllers in the project.
vc in question
overall project
code:
import UIKit
import EventKit
import CoreData
class CarDetailViewController: UIViewController,
UIImagePickerControllerDelegate, UINavigationControllerDelegate,
NSFetchedResultsControllerDelegate {
/* -------------------------------------------------------------------------------------------------------- */
let managedObjectContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
/* -------------------------------------------------------------------------------------------------------- */
#IBOutlet weak var myImageView: UIImageView!
let picker = UIImagePickerController()
#IBOutlet weak var carLabel: UILabel!
#IBAction func photoFromLibrary(_ sender: UIButton) {
picker.allowsEditing = false
picker.sourceType = .photoLibrary
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
present(picker, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
picker.delegate = self
self.view = UIImageView(image: UIImage(named: "Landing.png"))
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#nonobjc func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: AnyObject])
{
let chosenImage = info[UIImagePickerControllerOriginalImage]
myImageView.contentMode = .scaleAspectFit //3
myImageView.image = chosenImage as? UIImage //4
dismiss(animated: true, completion: nil) //5
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
{
dismiss(animated: true, completion: nil)
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
Try this :
Remove this Line :
self.view = UIImageView(image: UIImage(named: "Landing.png"))
You need to set background image as
self.view.backgroundColor = UIColor(patternImage: UIImage(named:"Landing.png")!)
you donot assign an imageview into a uiview
so instead of
self.view = UIImageView(image: UIImage(named: "Landing.png"))
You have the following options:
You should add a uiimageview into your uiview and assign it that image.
you can create a gradient background color with this image.
IMHO use the first approach, as the second might cause resolution issues with different devices
Edit update:
Instead of initializing the vc as following
let destination = CarDetailViewController() // Your destination
try doing the following
let storyboard = UIStoryboard(name: <Storyboard-name>, bundle: nil)
let inquireViewController = storyboard.instantiateViewController(withIdentifier: String(describing:CarDetailViewController.self)) as! CarDetailViewController

Selecting photo returns to blank UI

I am trying to make an image uploader on my ios app.
EDIT 7
This question is now more clearly asked here: Present Modal for Image Select Erases UI
END OF EDIT 7
The first thing I am trying to do is enable the user to select an image that they want for upload.
EDIT 6
I have simplified all the code to simply one button press. The Modal presentation deletes the previous page's UI. How I prevent this.
import UIKit
class AddImageToStandViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func loadImageButtonTapped(sender: UIButton) {
let imagePicker = UIImagePickerController()
imagePicker.allowsEditing = false
imagePicker.sourceType = .PhotoLibrary
self.presentViewController(imagePicker, animated: true, completion: nil)
}
}
I have found that the selection works just fine and does not destroy the UI if I push/segue from a different to this controller.
END OF EDIT 6
Below this is the other methods that I have tried before this
So far, this code enables a user to press a button and choose a photo from their photos. But, after they click the photo it just returns them to an empty View except the navbar at the bottom.
It seems my user is being returned, not to the view that they came from, but to a separate empty view. How do I return the user to the view that they came from?
import UIKit
class CreateStandViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet var image: UIImageView!
...
#IBAction func selectPicture(sender: AnyObject) {
let ImagePicker = UIImagePickerController()
ImagePicker.delegate = self
ImagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(ImagePicker, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
image.image = info[UIImagePickerControllerOriginalImage] as? UIImage
self.dismissViewControllerAnimated(true, completion: nil)
}
...
let me know if there is any more information that I should give.
EDIT 1
this code has the same effect
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
image.image = info[UIImagePickerControllerOriginalImage] as? UIImage
picker.dismissViewControllerAnimated(true, completion: nil)
}
I have tried adding this line below but I get an error stating that CreateStandViewController.Type cannot be converted to the expected UIViewController.
self.presentViewController(CreateStandViewController, animated: true, completion: nil)
EDIT 2
This code below doesnt error but also changes nothing
let createStandController = CreateStandViewController()
self.presentViewController(createStandController, animated: true, completion: nil)
EDIT 3
I have literally copied all the code from here: http://www.codingexplorer.com/choosing-images-with-uiimagepickercontroller-in-swift/ and now have:
import UIKit
class CreateStandViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet var imageView: UIImageView!
let imagePicker = UIImagePickerController()
#IBAction func loadImageButtonTapped(sender: UIButton) {
imagePicker.allowsEditing = false
imagePicker.sourceType = .PhotoLibrary
presentViewController(imagePicker, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
imagePicker.delegate = self
}
// MARK: - UIImagePickerControllerDelegate Methods
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
imageView.contentMode = .ScaleAspectFit
imageView.image = pickedImage
}
dismissViewControllerAnimated(true, completion: nil)
}
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
dismissViewControllerAnimated(true, completion: nil)
}
}
This has the same issue as before. When the image is selected I am sent back to a view that is white with the navbar at the bottom.
EDIT 4
I have run the same code in its own separate project as a stand alone view controller and it works. There is some code that I have in the background of my app that is killing the functionality of the code (maybe). I am guessing it may have something to do with the navbar?
EDIT 5
I removed the tab bar at the bottom by seguing to the image selecting view via a present Modally segue, but it had no effect.
Just replace your
self.dismissViewControllerAnimated(true, completion: nil)
with
picker.dismissViewControllerAnimated(true, completion: nil)
I think you will get the point after that

UIImagePickerController - Choose saved images in the camera view

I am able to start the UIImagePickerController to make a picture:
func selectCamera(){
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.Camera;
imagePicker.allowsEditing = true
self.presentViewController(imagePicker, animated: true, completion: nil)
}
}
and with this function to choose from the saved pictures:
func selectPicture() {
let picker = UIImagePickerController()
picker.allowsEditing = true
picker.delegate = self
presentViewController(picker, animated: true, completion: nil)
}
I can either choose a image from my image gallery on the phone or take a picture.
But i want to choose one of the saved image gallery pics inside the camera view, how it is in the standard camera application. Is this possible?
If you want to have Gallery Pics inside camera view, you got to create a custom cameraOverlay view, which has a button to then open the saved pictures.
To make it faster, you can use a library like --> https://github.com/GabrielAlva/Cool-iOS-Camera
Or
You can also have a action sheet, asking user to select which option he wants.
Check this -> How to allow the user to pick a photo from his camera roll or photo library?
& this --> https://github.com/chroman/CRMediaPickerController
I am using this solution, without additional libraries.
First of all don't forget to delegate, UIImagePickerControllerDelegate, and navigation delegate. Those thigns needed only for imagePickerController.
Update, check function saveImageViewToAlbum, be sure that your imageView containt image, otherwise you probably will catch exception. Adds a photo to the saved photos album. The optional completionSelector should have the form:
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo;
Just created this project, and everything works on swift, iOS 9.3
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet weak var choosenImageView: UIImageView!
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.
}
#IBAction func openAlbum(sender: UIButton) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
imagePickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self .presentViewController(imagePickerController, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
choosenImageView.image = image
self .dismissViewControllerAnimated(true, completion: nil)
}
#IBAction func saveImageViewToAlbum(sender: UIButton) {
UIImageWriteToSavedPhotosAlbum(choosenImageView.image!, nil, nil, nil)
}
}

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