feat: Share screenshot feature in base map controller

Sources/Earthquake Network/Controllers/Reports/SegnalazioniMapViewController.swift

@@ -28,35 +28,7 @@ class SegnalazioniMapViewController: EQNBaseMapViewController {
     private var filteredReports = [EQNSegnalazione]()
     
     // MARK: - UI
-    
-    // app icon and name displayed on the screenshot
-    private lazy var watermarkView: UIView = {
-        let view = UIView()
-        view.translatesAutoresizingMaskIntoConstraints = false
-        view.isHidden = true
         
-        let logo = UIImageView(image: .init(named: "eq_icon_transparent"))
-        logo.translatesAutoresizingMaskIntoConstraints = false
-        logo.contentMode = .scaleAspectFit
-        view.addSubview(logo)
-        logo.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
-        logo.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
-        logo.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
-        logo.widthAnchor.constraint(equalTo: logo.heightAnchor).isActive = true
-        
-        let title = UILabel()
-        title.translatesAutoresizingMaskIntoConstraints = false
-        title.text = NSLocalizedString("app_name", comment: "") + " App"
-        title.textColor = AppTheme.Colors.red
-        title.font = .preferredFont(forTextStyle: .title3, weight: .semibold)
-        view.addSubview(title)
-        title.leadingAnchor.constraint(equalTo: logo.trailingAnchor, constant: 10.0).isActive = true
-        title.centerYAnchor.constraint(equalTo: logo.centerYAnchor).isActive = true
-        title.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
-        
-        return view
-    }()
-    
     private lazy var magnitudeLegendView: UIView = {
         let view = UIView()
         view.translatesAutoresizingMaskIntoConstraints = false
@@ -95,16 +67,11 @@ class SegnalazioniMapViewController: EQNBaseMapViewController {
     
     override func extraUI() {        
         view.addSubview(magnitudeLegendView)
-        view.addSubview(watermarkView)
         
         magnitudeLegendView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
         magnitudeLegendView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
         magnitudeLegendView.heightAnchor.constraint(equalToConstant: 25.0).isActive = true
         magnitudeLegendView.topAnchor.constraint(equalTo: mapView.topAnchor).isActive = true
-        
-        watermarkView.topAnchor.constraint(equalTo: mapView.topAnchor, constant: 10.0).isActive = true
-        watermarkView.leadingAnchor.constraint(equalTo: mapView.leadingAnchor, constant: 10.0).isActive = true
-        watermarkView.heightAnchor.constraint(equalToConstant: 40.0).isActive = true
     }
     
     override func configureUI() {
@@ -195,29 +162,16 @@ class SegnalazioniMapViewController: EQNBaseMapViewController {
     }
     
     @objc private func onTapScreenshotButton(_ sender: Any) {
-        let snapshot = createSnapshot()
-        
-        let controller = UIActivityViewController(activityItems: [snapshot], applicationActivities: [])
-        present(controller, animated: true)
-    }
-    
-    public func createSnapshot() -> UIImage {
-        // mostriamo il watermark e nascondiamo la legenda
-        watermarkView.isHidden = false
-        magnitudeLegendView.isHidden = true
-
-        // riduciamo la porzione da salvare alla sola mappa (eliminiamo i filtri)
-        let size = CGSize(width: view.bounds.width, height: mapView.bounds.maxY)
-        let renderer = UIGraphicsImageRenderer(size: size)
-        let image = renderer.image { ctx in
-            view.drawHierarchy(in: view.bounds, afterScreenUpdates: true)
+        let screenshot = createSnapshot {
+            // nascondiamo la legenda
+            magnitudeLegendView.isHidden = true
+        } restore: {
+            // ri-visualizziamo la legenda
+            magnitudeLegendView.isHidden = false
         }
         
-        // torniamo allo stato originale
-        watermarkView.isHidden = true
-        magnitudeLegendView.isHidden = false
-        
-        return image
+        let controller = UIActivityViewController(activityItems: [screenshot], applicationActivities: [])
+        present(controller, animated: true)
     }
     
     // MARK: - Private

Sources/Earthquake Network/Controllers/Seismic Networks/SeismicNetworksMapDetailViewController.swift

@@ -226,7 +226,10 @@ class SeismicNetworksMapDetailViewController: EQNBaseMapViewController {
     }
     
     private func shareScreenshot() {
-        // TODO: da implementare
+        let screenshot = createSnapshot()
+        
+        let controller = UIActivityViewController(activityItems: [screenshot], applicationActivities: [])
+        present(controller, animated: true)
     }
         
     // MARK: - Map

Sources/Earthquake Network/Controllers/Shared/EQNBaseMapViewController.swift

@@ -104,6 +104,34 @@ class EQNBaseMapViewController: EQNBaseViewController, MKMapViewDelegate {
         return label
     }()
     
+    // app icon and name displayed on the screenshot
+    private lazy var watermarkView: UIView = {
+        let view = UIView()
+        view.translatesAutoresizingMaskIntoConstraints = false
+        
+        let logo = UIImageView(image: .init(named: "eq_icon_transparent"))
+        logo.translatesAutoresizingMaskIntoConstraints = false
+        logo.contentMode = .scaleAspectFit
+        view.addSubview(logo)
+        logo.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
+        logo.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
+        logo.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
+        logo.widthAnchor.constraint(equalTo: logo.heightAnchor).isActive = true
+        
+        let title = UILabel()
+        title.translatesAutoresizingMaskIntoConstraints = false
+        title.text = NSLocalizedString("app_name", comment: "") + " App"
+        title.textColor = AppTheme.Colors.red
+        title.font = .preferredFont(forTextStyle: .title3, weight: .semibold)
+        view.addSubview(title)
+        title.leadingAnchor.constraint(equalTo: logo.trailingAnchor, constant: 10.0).isActive = true
+        title.centerYAnchor.constraint(equalTo: logo.centerYAnchor).isActive = true
+        title.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
+        
+        return view
+    }()
+
+    
     // MARK: - Init
     
     init() {
@@ -155,6 +183,18 @@ class EQNBaseMapViewController: EQNBaseViewController, MKMapViewDelegate {
         extraUI()
     }
     
+    private func addWatermarkView() {
+        view.addSubview(watermarkView)
+        
+        watermarkView.topAnchor.constraint(equalTo: mapView.topAnchor, constant: 10.0).isActive = true
+        watermarkView.leadingAnchor.constraint(equalTo: mapView.leadingAnchor, constant: 10.0).isActive = true
+        watermarkView.heightAnchor.constraint(equalToConstant: 40.0).isActive = true
+    }
+    
+    private func removeWatermarkView() {
+        watermarkView.removeFromSuperview()
+    }
+    
     // MARK: - View Lifecycle
     
     override func viewDidLoad() {
@@ -262,6 +302,26 @@ class EQNBaseMapViewController: EQNBaseViewController, MKMapViewDelegate {
         .min
     }
     
+    func createSnapshot(
+        prepare: () -> Void = { },
+        restore: () -> Void = { }
+    ) -> UIImage {
+        prepare()
+        addWatermarkView()
+        
+        // riduciamo la porzione da salvare alla sola mappa (eliminiamo i filtri)
+        let size = CGSize(width: view.bounds.width, height: mapView.bounds.maxY)
+        let renderer = UIGraphicsImageRenderer(size: size)
+        let image = renderer.image { ctx in
+            view.drawHierarchy(in: view.bounds, afterScreenUpdates: true)
+        }
+
+        restore()
+        removeWatermarkView()
+        
+        return image
+    }
+    
     // MARK: - Private
     
     private func updateUI() {