How to show FullScreenSlideshowViewController on ViewDidLoad - ios

I am new to iOS development, I have created android app where app gets sets of images (sometimes over 100 images) from urls and loads into imageView with zoomEnabled Inside ViewPager.
Now I want to create same app for iOS, I have found this lib ImageSliderShow. Problem with this is it shows fullscreen ONLY when user did tap on selected image. I have been struggling to presentFullScreenController on viewDidLoad with no lock.
I only want image to be shown in fullScreen, example:
Select Category A From CategoryVC -> Loads ImageSlideVC, gets set of images from server, show in FullScreenView.
How can i achieve this? Adding this:
slideshow.presentFullScreenController(from: self)
on viewDidLoad didn't work:
#IBOutlet var slideshow: ImageSlideshow!
let kingfisherSource = [KingfisherSource(urlString: "https://images.unsplash.com/photo-1447746249824-4be4e1b76d66?w=1080")!,
KingfisherSource(urlString: "https://images.unsplash.com/photo-1447746249824-4be4e1b76d66?w=1080")!,
KingfisherSource(urlString: "https://images.unsplash.com/photo-1463595373836-6e0b0a8ee322?w=1080")!]
override func viewDidLoad() {
super.viewDidLoad()
slideshow.setImageInputs(kingfisherSource)
slideshow.presentFullScreenController(from: self)
}
I dont get any error, output is same as before (shows slideshow in smallview with no zoom)
Please help
EDIT
by doing in viewDidAppear, after split second view is loaded its loads into fullscreen. First its smallview then shows in fullscreen. I think i have to do something inside setImageInputs
this is what its looks like :
open func setImageInputs(_ inputs: [InputSource]) {
self.images = inputs
self.pageControl.numberOfPages = inputs.count
// in circular mode we add dummy first and last image to enable smooth scrolling
if circular && images.count > 1 {
var scImages = [InputSource]()
if let last = images.last {
scImages.append(last)
}
scImages += images
if let first = images.first {
scImages.append(first)
}
self.scrollViewImages = scImages
} else {
self.scrollViewImages = images
}
reloadScrollView()
layoutScrollView()
layoutPageControl()
setTimerIfNeeded()
}

try to do it in viewDidAppear
#IBOutlet var slideshow: ImageSlideshow!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
slideshow.setImageInputs(kingfisherSource)
slideshow.presentFullScreenController(from: self)
}
Presenting viewController in ViewDidLoad is a bad practice.

Related

Why are animated calls of UIView.isHidden = false compounded?

As you can see I'm having trouble formulating the question. Let me try to explain:
I'm using a search bar in my swift ios app. In order to get a desired animation effect I put it in a vertical stack view and then animate its isHidden property. This way search bar pushes down other children of the stack view as it animates in or pulls them up as it animates out. So far so good.
I've noticed a behavior that I think is strange. Could be a bug or could be me not understanding how things work. Basically if I call search bar hiding method x times in a row I need to call search bar showing method x times before it would show. I'd expect to have to make just one call to show search bar regardless of how many times I called hiding method. The issue doesn't exist other way around: if I call search bar showing code x times I only need to call hiding method once for it to go away. This doesn't happen if I set isHidden without animating it...
Here's a sample code and a video of the issue. I'd appreciate it if someone would help me understand this behavior.
class ViewController: UIViewController {
#IBOutlet weak var searchBar: UISearchBar! {
didSet {
searchBar.isHidden = true
}
}
#IBAction func showAction(_ sender: UIButton) {
expandSearch()
}
#IBAction func hideAction(_ sender: UIButton) {
collapseSearch()
}
private func expandSearch() {
UIView.animate(withDuration: 0.3){
self.searchBar.isHidden = false
}
}
private func collapseSearch() {
UIView.animate(withDuration: 0.3){
self.searchBar.isHidden = true
}
searchBar.resignFirstResponder()
}
}
You should not call an asynchronous animation of searchbar x times, instead of I suggest you to keep its state in variable, something like isSearchBarHidden,
and check it before show/hide search bar. You could use just one method with such signature showSearchBar(show: Bool) and setting this variable there.
#IBAction func showAction(_ sender: UIButton) {
showSearchBar(true)
}
#IBAction func hideAction(_ sender: UIButton) {
showSearchBar(false)
}
private
func showSearchBar(_ show: Bool) {
guard isSearchBarHidden != show else {
return
}
UIView.animate(withDuration: 0.3, animations: {
self.searchBar.isHidden = show
}) {
self.isSearchBarHidden = show
if !show && searchBar.isFerstResponder {
searchBar.resignFirstResponder
}
}
}
private
var isSearchBarHidden: Bool = true
Also it is a good practice to check if your textView/textField/searchBar isFirstResponder before call resignFirstResponder.
Hope it will help. Good luck!

How do I make my ImageView scrollable without affecting the rest of the view?

How Do I add multipleImages for the top part and have it scrollable without moving the rest of the content? Also, how do I have the little dots at the bottom to indicate which image I'm on? My code for the image is down below.
import SDWebImage
#IBOutlet weak var headerImage: UIImageView!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let imageUrl:NSURL? = NSURL(string: headerPhoto!)
if let url = imageUrl {
headerImage.sd_setImage(with: url as URL!)
}
}
You are looking for something called image slide show or image slider.
Instead of creating them by yourself which requires lots of effort, here is a GitHub library that is easy to use.
Basicly the way slider works is that it is a horizontal scroll view and each cell in the scroll view is an image so that you can scroll. Then, put a fixed page index element on the bottom of the scroll view to tell you which image you are currently at.
To use it, create a UIView in your viewcontroller and set both class and module to ImageSlideshow. Then connect it to your ViewController.swift as IBOutLet.
Then create an array of image urls
let alamofireSource = [AlamofireSource(urlString: "imgurl1")!, AlamofireSource(urlString: "imgurl2")!, AlamofireSource(urlString: "imgurl3")!]
And finally in your viewDidLoad() function:
override func viewDidLoad() {
super.viewDidLoad()
slideshow.backgroundColor = UIColor.white
slideshow.slideshowInterval = 5.0
slideshow.pageControlPosition = PageControlPosition.underScrollView
slideshow.pageControl.currentPageIndicatorTintColor = UIColor.lightGray
slideshow.pageControl.pageIndicatorTintColor = UIColor.black
slideshow.contentScaleMode = UIViewContentMode.scaleAspectFill
slideshow.setImageInputs(alamofireSource)
}

Slide UIInputView with UIViewController like Slack

I'd like to use the UIViewController's input accessory view like this:
override func canBecomeFirstResponder() -> Bool {
return true
}
override var inputAccessoryView: UIView! {
return self.bar
}
but the issue is that I have a drawer like view and when I slide the view open, the input view stays on the window. How can I keep the input view on the center view like Slack does it.
Where my input view stays at the bottom, taking up the full screen (the red is the input view in the image below):
There are two ways to do this exactly like Slack doing it, Meiwin has a medium post here A Stickler for Details: Implementing Sticky Input Field in iOS to show how he managed to do this which he actually puts an empty UIView as an inputAccessoryView then track it’s coordinates on screen to know where to put his custom view in relation with the empty view, this way can be helpful if you are going to support SplitViewController on iPad, but if you are not interested in this way, you can see how I managed to do this like this image
Here is before swiping
Here is after
All I did was actually taking a snapshot from the inputAccessoryView window and putting it on the NavigationController of the TableViewController
I am using SideMenu from Jon Kent and it’s pretty easy to do it with the UISideMenuNavigationControllerDelegate
var isInputAccessoryViewEnabled = true {
didSet {
self.inputAccessoryView?.isHidden = !self.isInputAccessoryViewEnabled
if self.isInputAccessoryViewEnabled {self.becomeFirstResponder()}
}
}
func sideMenuWillAppear(menu: UISideMenuNavigationController, animated: Bool) {
let inputWindow = UIApplication.shared.windows.filter({$0.className == "UITextEffectsWindow"}).first
self.inputAccessoryViewSnapShot = inputWindow?.snapshotView(afterScreenUpdates: false)
if let snapShotView = self.inputAccessoryViewSnapShot, let navView = self.navigationController?.view {
navView.addSubview(snapShotView)
}
self.isInputAccessoryViewEnabled = false
}
func sideMenuDidDisappear(menu: UISideMenuNavigationController, animated: Bool) {
self.inputAccessoryViewSnapShot?.removeFromSuperview()
self.isInputAccessoryViewEnabled = true
}
I hope that helps :)

Refresh UIImageView in Swift after Image File Has Changed

In my app I am setting the image of a UIImageView as follows:
override func viewWillAppear(animated: Bool) {
// ...
self.currentPlayer.image = UIImage(named: appDelegate.appSupportDirectory.stringByAppendingPathComponent(currentPlayer!.id!.UUIDString + ".jpg"))
}
In a different view, I allow the user to change the image, namely replace the file with a new one while keeping the name. When I return to this view the old picture is still shown. The app seems to remember the outdated picture even when I load a different player profile in between. How can I force the UIImageView to refresh?
Solution found. Change the code to:
override func viewWillAppear(animated: Bool) {
// ...
self.currentPlayer.image = UIImage(contentsOfFile: appDelegate.appSupportDirectory.stringByAppendingPathComponent(currentPlayer!.id!.UUIDString + ".jpg"))
}

How to make Image page viewer for images swift ios

I wanna display a couple of images from the assets folders, into my application. so I wanna make a page view.
First, images will be inside collection view, then on click, the image will be full screen. Then the user can slide between the images by swiping right and left as shown in the following photo:
I found this tutorial:
PhotosGalleryApp
Updated:
I have this in my storyboard:
Now in GaleryViewController I show the images in cells
when user click on it, I open the image in fullscreen in PhotoViewController.
PhotoViewController.swift :
import UIKit
class PhotoViewController: UIViewController{
#IBOutlet weak var imageView: UIImageView!
var index: Int = 0;
var pageViewController : UIPageViewController?
#IBAction func btnCancelClicked(sender: AnyObject) {
self.navigationController?.popToRootViewControllerAnimated(true);
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
initUI();
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(animated: Bool) {
self.navigationController?.hidesBarsOnTap = true;
self.navigationController?.hidesBarsOnSwipe = true;
displayPhoto()
}
func initUI() -> Void {
// pageViewController = UIPageViewController(transitionStyle: .Scroll, navigationOrientation: .Horizontal, options: nil)
// pageViewController!.dataSource = self
}
func displayPhoto() {
self.imageView.image = UIImage(named: Constants.Statics.images[index])
}
I have the images in static structure so i can access them anywhere:
class Constants {
struct Statics {
static let images = ["1.jpg","2.jpg","3.jpg","4.jpg","5.jpg","7.jpg","8.jpg"]
}
}
My problem is: I want to add the feature that allow me to swipe between pictures inside the PhotoViewController.
Any ideas?
Thank you
You can do one of the following two things to achieve your goal :
Make a modal segue of the cell to the next UICollectionViewController where the images are showed in full screen, and in the prepareForSegue pass all the data (images) you need to show and where exactly you are in this moment (indexOfImage).
You can watch the didSelectItemAtIndexPath and then pass all the data to one instance of the next UICollectionViewController you want to show with the presentViewController func.
But it's very important that in the next UICollectionViewController you have set pageEnabled = true in code or in the Interface Builder (I though is much easy to do.)
UPDATE:
Very good tutorials on how to make a slide show of images using an UIScrollView or an UICollectionView :
How To Use UIScrollView to Scroll and Zoom Content
Creating a Paged Photo Gallery With a UICollectionView
I hope this help you.

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