Use Javascript to fetch to the image for the ImageViewController
This commit is contained in:
Maurice Parker
parent
a1f26898c8
commit
4759cedd35
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@ -349,15 +349,38 @@ extension ArticleViewController: WKUIDelegate {
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extension ArticleViewController: WKScriptMessageHandler {
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func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
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if message.name == MessageName.imageWasClicked, let link = message.body as? String, let url = URL(string: link) {
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if message.name == MessageName.imageWasClicked,
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let body = message.body as? String,
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let data = body.data(using: .utf8),
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let clickMessage = try? JSONDecoder().decode(ImageClickMessage.self, from: data),
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let range = clickMessage.imageURL.range(of: ";base64,") {
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let base64Image = String(clickMessage.imageURL.suffix(from: range.upperBound))
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if let imageData = Data(base64Encoded: base64Image), let image = UIImage(data: imageData) {
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let imageVC = UIStoryboard.main.instantiateController(ofType: ImageViewController.self)
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imageVC.url = url
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imageVC.image = image
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imageVC.modalPresentationStyle = .fullScreen
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present(imageVC, animated: true)
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}
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}
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}
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}
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// MARK: JSON
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private struct TemplateData: Codable {
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let style: String
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let body: String
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}
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private struct ImageClickMessage: Codable {
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let x: Float
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let y: Float
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let width: Float
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let height: Float
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let imageURL: String
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}
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// MARK: Private
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private extension ArticleViewController {
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@ -369,8 +392,3 @@ private extension ArticleViewController {
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}
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}
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private struct TemplateData: Codable {
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let style: String
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let body: String
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}
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@ -69,6 +69,7 @@ class ArticleViewControllerWebViewProvider: NSObject, WKNavigationDelegate {
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let configuration = WKWebViewConfiguration()
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configuration.preferences = preferences
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configuration.setValue(true, forKey: "allowUniversalAccessFromFileURLs")
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configuration.allowsInlineMediaPlayback = true
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configuration.mediaTypesRequiringUserActionForPlayback = .video
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@ -11,55 +11,29 @@ import UIKit
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class ImageViewController: UIViewController {
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@IBOutlet weak var shareButton: UIButton!
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@IBOutlet weak var activityIndicatorView: UIActivityIndicatorView!
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@IBOutlet weak var imageScrollView: ImageScrollView!
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private var dataTask: URLSessionDataTask? = nil
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private var image: UIImage?
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var url: URL!
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var image: UIImage!
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override func viewDidLoad() {
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super.viewDidLoad()
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activityIndicatorView.isHidden = false
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activityIndicatorView.startAnimating()
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imageScrollView.setup()
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imageScrollView.imageScrollViewDelegate = self
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imageScrollView.imageContentMode = .aspectFit
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imageScrollView.initialOffset = .center
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dataTask = URLSession.shared.dataTask(with: url) { [weak self] data, response, error in
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guard let self = self else { return }
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if let data = data, let image = UIImage(data: data) {
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self.image = image
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DispatchQueue.main.async {
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self.shareButton.isEnabled = true
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self.activityIndicatorView.isHidden = true
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self.activityIndicatorView.stopAnimating()
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self.imageScrollView.display(image: image)
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}
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}
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}
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dataTask!.resume()
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imageScrollView.display(image: image)
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}
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@IBAction func share(_ sender: Any) {
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guard let image = image else { return }
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let activityViewController = UIActivityViewController(activityItems: [url!, image], applicationActivities: nil)
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let activityViewController = UIActivityViewController(activityItems: [image], applicationActivities: nil)
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activityViewController.popoverPresentationController?.sourceView = shareButton
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activityViewController.popoverPresentationController?.sourceRect = shareButton.bounds
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present(activityViewController, animated: true)
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}
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@IBAction func done(_ sender: Any) {
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dataTask?.cancel()
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dismiss(animated: true)
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}
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@ -237,19 +237,10 @@
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<subviews>
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<scrollView verifyAmbiguity="off" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" ambiguous="YES" translatesAutoresizingMaskIntoConstraints="NO" id="msG-pz-EKk" customClass="ImageScrollView" customModule="NetNewsWire" customModuleProvider="target">
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<rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
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<subviews>
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<activityIndicatorView opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" style="large" translatesAutoresizingMaskIntoConstraints="NO" id="iEh-n3-Vkg">
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<rect key="frame" x="188.5" y="390.5" width="37" height="37"/>
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</activityIndicatorView>
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</subviews>
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<constraints>
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<constraint firstItem="iEh-n3-Vkg" firstAttribute="centerX" secondItem="msG-pz-EKk" secondAttribute="centerX" id="FSP-DY-Vax"/>
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<constraint firstItem="iEh-n3-Vkg" firstAttribute="centerY" secondItem="msG-pz-EKk" secondAttribute="centerY" id="rev-zC-wMY"/>
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</constraints>
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<viewLayoutGuide key="contentLayoutGuide" id="phv-DN-krZ"/>
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<viewLayoutGuide key="frameLayoutGuide" id="NNU-C8-Fsz"/>
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</scrollView>
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<button opaque="NO" contentMode="scaleToFill" enabled="NO" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="RmY-a3-hUg">
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<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="RmY-a3-hUg">
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<rect key="frame" x="362" y="44" width="44" height="44"/>
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<constraints>
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<constraint firstAttribute="width" constant="44" id="56o-Zr-T0w"/>
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@ -288,7 +279,6 @@
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<viewLayoutGuide key="safeArea" id="mbY-02-GFL"/>
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</view>
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<connections>
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<outlet property="activityIndicatorView" destination="iEh-n3-Vkg" id="xue-X1-awS"/>
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<outlet property="imageScrollView" destination="msG-pz-EKk" id="dGi-M6-dcO"/>
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<outlet property="shareButton" destination="RmY-a3-hUg" id="Z54-ah-WAI"/>
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</connections>
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@ -1,6 +1,34 @@
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// Used to pop a resizable image view
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function imageWasClicked(img) {
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window.webkit.messageHandlers.imageWasClicked.postMessage(img.src);
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async function imageWasClicked(img) {
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const rect = img.getBoundingClientRect();
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var message = {
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x: rect.x,
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y: rect.y,
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width: rect.width,
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height: rect.height
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};
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try {
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const response = await fetch(img.src);
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if (!response.ok) {
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throw new Error('Network response was not ok.');
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}
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const imgBlob = await response.blob();
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var reader = new FileReader();
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reader.readAsDataURL(imgBlob);
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reader.onloadend = function() {
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message.imageURL = reader.result;
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var jsonMessage = JSON.stringify(message);
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window.webkit.messageHandlers.imageWasClicked.postMessage(jsonMessage);
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}
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} catch (error) {
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console.log('There has been a problem with your fetch operation: ', error.message);
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}
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}
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// Add the click listeners for images
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