automated screenshots with fastlane

fastlane/Appfile

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+app_identifier("app.voltplan.CableApp") # The bundle identifier of your app
+# apple_id("[[APPLE_ID]]") # Your Apple Developer Portal username
+
+
+# For more information about the Appfile, see:
+#     https://docs.fastlane.tools/advanced/#appfile

fastlane/Fastfile

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+# This file contains the fastlane.tools configuration
+# You can find the documentation at https://docs.fastlane.tools
+#
+# For a list of all available actions, check out
+#
+#     https://docs.fastlane.tools/actions
+#
+# For a list of all available plugins, check out
+#
+#     https://docs.fastlane.tools/plugins/available-plugins
+#
+
+# Uncomment the line if you want fastlane to automatically update itself
+# update_fastlane
+
+default_platform(:ios)
+
+platform :ios do
+  desc "Generate new localized screenshots"
+  lane :screenshots do
+    capture_screenshots(scheme: "CableScreenshots")
+  end
+end

fastlane/README.md

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+fastlane documentation
+----
+
+# Installation
+
+Make sure you have the latest version of the Xcode command line tools installed:
+
+```sh
+xcode-select --install
+```
+
+For _fastlane_ installation instructions, see [Installing _fastlane_](https://docs.fastlane.tools/#installing-fastlane)
+
+# Available Actions
+
+## iOS
+
+### ios screenshots
+
+```sh
+[bundle exec] fastlane ios screenshots
+```
+
+Generate new localized screenshots
+
+----
+
+This README.md is auto-generated and will be re-generated every time [_fastlane_](https://fastlane.tools) is run.
+
+More information about _fastlane_ can be found on [fastlane.tools](https://fastlane.tools).
+
+The documentation of _fastlane_ can be found on [docs.fastlane.tools](https://docs.fastlane.tools).

fastlane/Snapfile

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+# Uncomment the lines below you want to change by removing the # in the beginning
+devices([
+    "iPhone 17 Pro",
+    "iPhone 17 Pro Max"
+])
+
+languages([
+   "en-US",
+   "de-DE",
+   "nl-NL",
+   "es-ES"
+])
+
+scheme("CableScreenshots")
+clear_previous_screenshots(true)
+localize_simulator(true)
+erase_simulator(true)
+override_status_bar(true)
+# A list of devices you want to take the screenshots from
+# devices([
+#   "iPhone 8",
+#   "iPhone 8 Plus",
+#   "iPhone SE",
+#   "iPhone X",
+#   "iPad Pro (12.9-inch)",
+#   "iPad Pro (9.7-inch)",
+#   "Apple TV 1080p",
+#   "Apple Watch Series 6 - 44mm"
+# ])
+
+# languages([
+#   "en-US",
+#   "de-DE",
+#   "it-IT",
+#   ["pt", "pt_BR"] # Portuguese with Brazilian locale
+# ])
+
+# The name of the scheme which contains the UI Tests
+# scheme("SchemeName")
+
+# Where should the resulting screenshots be stored?
+# output_directory("./screenshots")
+
+# remove the '#' to clear all previously generated screenshots before creating new ones
+# clear_previous_screenshots(true)
+
+# Remove the '#' to set the status bar to 9:41 AM, and show full battery and reception. See also override_status_bar_arguments for custom options.
+# override_status_bar(true)
+
+# Arguments to pass to the app on launch. See https://docs.fastlane.tools/actions/snapshot/#launch-arguments
+# launch_arguments(["-favColor red"])
+
+# For more information about all available options run
+# fastlane action snapshot

fastlane/SnapshotHelper.swift

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+//
+//  SnapshotHelper.swift
+//  Example
+//
+//  Created by Felix Krause on 10/8/15.
+//
+
+// -----------------------------------------------------
+// IMPORTANT: When modifying this file, make sure to
+//            increment the version number at the very
+//            bottom of the file to notify users about
+//            the new SnapshotHelper.swift
+// -----------------------------------------------------
+
+import Foundation
+import XCTest
+
+@MainActor
+func setupSnapshot(_ app: XCUIApplication, waitForAnimations: Bool = true) {
+    Snapshot.setupSnapshot(app, waitForAnimations: waitForAnimations)
+}
+
+@MainActor
+func snapshot(_ name: String, waitForLoadingIndicator: Bool) {
+    if waitForLoadingIndicator {
+        Snapshot.snapshot(name)
+    } else {
+        Snapshot.snapshot(name, timeWaitingForIdle: 0)
+    }
+}
+
+/// - Parameters:
+///   - name: The name of the snapshot
+///   - timeout: Amount of seconds to wait until the network loading indicator disappears. Pass `0` if you don't want to wait.
+@MainActor
+func snapshot(_ name: String, timeWaitingForIdle timeout: TimeInterval = 20) {
+    Snapshot.snapshot(name, timeWaitingForIdle: timeout)
+}
+
+enum SnapshotError: Error, CustomDebugStringConvertible {
+    case cannotFindSimulatorHomeDirectory
+    case cannotRunOnPhysicalDevice
+
+    var debugDescription: String {
+        switch self {
+        case .cannotFindSimulatorHomeDirectory:
+            return "Couldn't find simulator home location. Please, check SIMULATOR_HOST_HOME env variable."
+        case .cannotRunOnPhysicalDevice:
+            return "Can't use Snapshot on a physical device."
+        }
+    }
+}
+
+@objcMembers
+@MainActor
+open class Snapshot: NSObject {
+    static var app: XCUIApplication?
+    static var waitForAnimations = true
+    static var cacheDirectory: URL?
+    static var screenshotsDirectory: URL? {
+        return cacheDirectory?.appendingPathComponent("screenshots", isDirectory: true)
+    }
+    static var deviceLanguage = ""
+    static var currentLocale = ""
+
+    open class func setupSnapshot(_ app: XCUIApplication, waitForAnimations: Bool = true) {
+
+        Snapshot.app = app
+        Snapshot.waitForAnimations = waitForAnimations
+
+        do {
+            let cacheDir = try getCacheDirectory()
+            Snapshot.cacheDirectory = cacheDir
+            setLanguage(app)
+            setLocale(app)
+            setLaunchArguments(app)
+        } catch let error {
+            NSLog(error.localizedDescription)
+        }
+    }
+
+    class func setLanguage(_ app: XCUIApplication) {
+        guard let cacheDirectory = self.cacheDirectory else {
+            NSLog("CacheDirectory is not set - probably running on a physical device?")
+            return
+        }
+
+        let path = cacheDirectory.appendingPathComponent("language.txt")
+
+        do {
+            let trimCharacterSet = CharacterSet.whitespacesAndNewlines
+            deviceLanguage = try String(contentsOf: path, encoding: .utf8).trimmingCharacters(in: trimCharacterSet)
+            app.launchArguments += ["-AppleLanguages", "(\(deviceLanguage))"]
+        } catch {
+            NSLog("Couldn't detect/set language...")
+        }
+    }
+
+    class func setLocale(_ app: XCUIApplication) {
+        guard let cacheDirectory = self.cacheDirectory else {
+            NSLog("CacheDirectory is not set - probably running on a physical device?")
+            return
+        }
+
+        let path = cacheDirectory.appendingPathComponent("locale.txt")
+
+        do {
+            let trimCharacterSet = CharacterSet.whitespacesAndNewlines
+            currentLocale = try String(contentsOf: path, encoding: .utf8).trimmingCharacters(in: trimCharacterSet)
+        } catch {
+            NSLog("Couldn't detect/set locale...")
+        }
+
+        if currentLocale.isEmpty && !deviceLanguage.isEmpty {
+            currentLocale = Locale(identifier: deviceLanguage).identifier
+        }
+
+        if !currentLocale.isEmpty {
+            app.launchArguments += ["-AppleLocale", "\"\(currentLocale)\""]
+        }
+    }
+
+    class func setLaunchArguments(_ app: XCUIApplication) {
+        guard let cacheDirectory = self.cacheDirectory else {
+            NSLog("CacheDirectory is not set - probably running on a physical device?")
+            return
+        }
+
+        let path = cacheDirectory.appendingPathComponent("snapshot-launch_arguments.txt")
+        app.launchArguments += ["-FASTLANE_SNAPSHOT", "YES", "-ui_testing"]
+
+        do {
+            let launchArguments = try String(contentsOf: path, encoding: String.Encoding.utf8)
+            let regex = try NSRegularExpression(pattern: "(\\\".+?\\\"|\\S+)", options: [])
+            let matches = regex.matches(in: launchArguments, options: [], range: NSRange(location: 0, length: launchArguments.count))
+            let results = matches.map { result -> String in
+                (launchArguments as NSString).substring(with: result.range)
+            }
+            app.launchArguments += results
+        } catch {
+            NSLog("Couldn't detect/set launch_arguments...")
+        }
+    }
+
+    open class func snapshot(_ name: String, timeWaitingForIdle timeout: TimeInterval = 20) {
+        if timeout > 0 {
+            waitForLoadingIndicatorToDisappear(within: timeout)
+        }
+
+        NSLog("snapshot: \(name)") // more information about this, check out https://docs.fastlane.tools/actions/snapshot/#how-does-it-work
+
+        if Snapshot.waitForAnimations {
+            sleep(1) // Waiting for the animation to be finished (kind of)
+        }
+
+        #if os(OSX)
+            guard let app = self.app else {
+                NSLog("XCUIApplication is not set. Please call setupSnapshot(app) before snapshot().")
+                return
+            }
+
+            app.typeKey(XCUIKeyboardKeySecondaryFn, modifierFlags: [])
+        #else
+
+            guard self.app != nil else {
+                NSLog("XCUIApplication is not set. Please call setupSnapshot(app) before snapshot().")
+                return
+            }
+
+            let screenshot = XCUIScreen.main.screenshot()
+            #if os(iOS) && !targetEnvironment(macCatalyst)
+            let image = XCUIDevice.shared.orientation.isLandscape ?  fixLandscapeOrientation(image: screenshot.image) : screenshot.image
+            #else
+            let image = screenshot.image
+            #endif
+
+            guard var simulator = ProcessInfo().environment["SIMULATOR_DEVICE_NAME"], let screenshotsDir = screenshotsDirectory else { return }
+
+            do {
+                // The simulator name contains "Clone X of " inside the screenshot file when running parallelized UI Tests on concurrent devices
+                let regex = try NSRegularExpression(pattern: "Clone [0-9]+ of ")
+                let range = NSRange(location: 0, length: simulator.count)
+                simulator = regex.stringByReplacingMatches(in: simulator, range: range, withTemplate: "")
+
+                let path = screenshotsDir.appendingPathComponent("\(simulator)-\(name).png")
+                #if swift(<5.0)
+                    try UIImagePNGRepresentation(image)?.write(to: path, options: .atomic)
+                #else
+                    try image.pngData()?.write(to: path, options: .atomic)
+                #endif
+            } catch let error {
+                NSLog("Problem writing screenshot: \(name) to \(screenshotsDir)/\(simulator)-\(name).png")
+                NSLog(error.localizedDescription)
+            }
+        #endif
+    }
+
+    class func fixLandscapeOrientation(image: UIImage) -> UIImage {
+        #if os(watchOS)
+            return image
+        #else
+            if #available(iOS 10.0, *) {
+                let format = UIGraphicsImageRendererFormat()
+                format.scale = image.scale
+                let renderer = UIGraphicsImageRenderer(size: image.size, format: format)
+                return renderer.image { context in
+                    image.draw(in: CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height))
+                }
+            } else {
+                return image
+            }
+        #endif
+    }
+
+    class func waitForLoadingIndicatorToDisappear(within timeout: TimeInterval) {
+        #if os(tvOS)
+            return
+        #endif
+
+        guard let app = self.app else {
+            NSLog("XCUIApplication is not set. Please call setupSnapshot(app) before snapshot().")
+            return
+        }
+
+        let networkLoadingIndicator = app.otherElements.deviceStatusBars.networkLoadingIndicators.element
+        let networkLoadingIndicatorDisappeared = XCTNSPredicateExpectation(predicate: NSPredicate(format: "exists == false"), object: networkLoadingIndicator)
+        _ = XCTWaiter.wait(for: [networkLoadingIndicatorDisappeared], timeout: timeout)
+    }
+
+    class func getCacheDirectory() throws -> URL {
+        let cachePath = "Library/Caches/tools.fastlane"
+        // on OSX config is stored in /Users/<username>/Library
+        // and on iOS/tvOS/WatchOS it's in simulator's home dir
+        #if os(OSX)
+            let homeDir = URL(fileURLWithPath: NSHomeDirectory())
+            return homeDir.appendingPathComponent(cachePath)
+        #elseif arch(i386) || arch(x86_64) || arch(arm64)
+            guard let simulatorHostHome = ProcessInfo().environment["SIMULATOR_HOST_HOME"] else {
+                throw SnapshotError.cannotFindSimulatorHomeDirectory
+            }
+            let homeDir = URL(fileURLWithPath: simulatorHostHome)
+            return homeDir.appendingPathComponent(cachePath)
+        #else
+            throw SnapshotError.cannotRunOnPhysicalDevice
+        #endif
+    }
+}
+
+private extension XCUIElementAttributes {
+    var isNetworkLoadingIndicator: Bool {
+        if hasAllowListedIdentifier { return false }
+
+        let hasOldLoadingIndicatorSize = frame.size == CGSize(width: 10, height: 20)
+        let hasNewLoadingIndicatorSize = frame.size.width.isBetween(46, and: 47) && frame.size.height.isBetween(2, and: 3)
+
+        return hasOldLoadingIndicatorSize || hasNewLoadingIndicatorSize
+    }
+
+    var hasAllowListedIdentifier: Bool {
+        let allowListedIdentifiers = ["GeofenceLocationTrackingOn", "StandardLocationTrackingOn"]
+
+        return allowListedIdentifiers.contains(identifier)
+    }
+
+    func isStatusBar(_ deviceWidth: CGFloat) -> Bool {
+        if elementType == .statusBar { return true }
+        guard frame.origin == .zero else { return false }
+
+        let oldStatusBarSize = CGSize(width: deviceWidth, height: 20)
+        let newStatusBarSize = CGSize(width: deviceWidth, height: 44)
+
+        return [oldStatusBarSize, newStatusBarSize].contains(frame.size)
+    }
+}
+
+private extension XCUIElementQuery {
+    var networkLoadingIndicators: XCUIElementQuery {
+        let isNetworkLoadingIndicator = NSPredicate { (evaluatedObject, _) in
+            guard let element = evaluatedObject as? XCUIElementAttributes else { return false }
+
+            return element.isNetworkLoadingIndicator
+        }
+
+        return self.containing(isNetworkLoadingIndicator)
+    }
+
+    @MainActor
+    var deviceStatusBars: XCUIElementQuery {
+        guard let app = Snapshot.app else {
+            fatalError("XCUIApplication is not set. Please call setupSnapshot(app) before snapshot().")
+        }
+
+        let deviceWidth = app.windows.firstMatch.frame.width
+
+        let isStatusBar = NSPredicate { (evaluatedObject, _) in
+            guard let element = evaluatedObject as? XCUIElementAttributes else { return false }
+
+            return element.isStatusBar(deviceWidth)
+        }
+
+        return self.containing(isStatusBar)
+    }
+}
+
+private extension CGFloat {
+    func isBetween(_ numberA: CGFloat, and numberB: CGFloat) -> Bool {
+        return numberA...numberB ~= self
+    }
+}
+
+// Please don't remove the lines below
+// They are used to detect outdated configuration files
+// SnapshotHelperVersion [1.30]

fastlane/report.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<testsuites>
+  <testsuite name="fastlane.lanes">
+    
+    
+    
+      
+      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.000145">
+        
+      </testcase>
+    
+      
+      <testcase classname="fastlane.lanes" name="1: capture_screenshots" time="392.968167">
+        
+      </testcase>
+    
+  </testsuite>
+</testsuites>