fix: ios12 compatibility

VoidLink/AppDelegate.h

@@ -10,6 +10,7 @@
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
 
+@property (strong, nonatomic) UIWindow *window;
 @property (strong, nonatomic) NSString *pcUuidToLoad;
 @property (strong, nonatomic) void (^shortcutCompletionHandler)(BOOL);
 

VoidLink/AppDelegate.m

@@ -60,6 +60,27 @@ static NSString* DB_NAME = @"Limelight_iOS.sqlite";
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     // Override point for command tool customization after application launch (works only when user default is nil)
     [CommandManager presetDefaultCommands];
+    
+    // For iOS 12 and below, we need to manually create the window
+    if (@available(iOS 13.0, *)) {
+        // Scene delegate will handle window creation
+    } else {
+        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+        
+        NSString *storyboardName;
+        if (UIDevice.currentDevice.userInterfaceIdiom == UIUserInterfaceIdiomPad) {
+            storyboardName = @"iPad";
+        } else {
+            storyboardName = @"iPhone";
+        }
+        
+        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle:nil];
+        UIViewController *initialViewController = [storyboard instantiateInitialViewController];
+        
+        self.window.rootViewController = initialViewController;
+        [self.window makeKeyAndVisible];
+    }
+    
     return YES;
 }
 

VoidLink/SceneDelegate.h

@@ -1,5 +1,6 @@
 #import <UIKit/UIKit.h>
 
+API_AVAILABLE(ios(13.0))
 @interface SceneDelegate : UIResponder <UIWindowSceneDelegate>
 
 @property (strong, nonatomic) UIWindow * window;

VoidLink/SceneDelegate.m

@@ -1,6 +1,7 @@
 #import "SceneDelegate.h"
 #import "StreamFrameViewController.h"
 
+API_AVAILABLE(ios(13.0))
 @implementation SceneDelegate
 
 static UIView *_sharedStreamVideoRenderView = nil;

VoidLink/ViewControllers/StreamFrameViewController.m

@@ -810,7 +810,9 @@
 - (void) returnToMainFrame {
     // Reset display mode back to default
     [self updatePreferredDisplayMode:NO];
-    [SceneDelegate clearExternalDisplayRenderView];
+    if (@available(iOS 13.0, *)) {
+        [SceneDelegate clearExternalDisplayRenderView];
+    }
 
     if (_settings.enablePIP) {
         [self cleanupPiPController];
@@ -834,7 +836,9 @@
         if (_streamVideoRenderView) {
              // Remove from current superview before passing it
              [_streamVideoRenderView removeFromSuperview];
-             [SceneDelegate setExternalDisplayRenderView:_streamVideoRenderView];
+             if (@available(iOS 13.0, *)) {
+                 [SceneDelegate setExternalDisplayRenderView:_streamVideoRenderView];
+             }
              NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
              [nc postNotificationName:@"ScreenChanged" object:self];
         } else {
@@ -847,7 +851,9 @@
 - (void)extScreenDidDisconnect:(NSNotification *)notification {
     Log(LOG_I, @"External Screen Disconnected");
     if(UIScreen.screens.count < 2) {
-        [SceneDelegate clearExternalDisplayRenderView];
+        if (@available(iOS 13.0, *)) {
+            [SceneDelegate clearExternalDisplayRenderView];
+        }
         // Add the render view back to the local StreamView if AirPlay was active
         if ([self isAirPlayEnabled]) {
             if (_streamVideoRenderView && _streamView) {
@@ -878,9 +884,13 @@
 - (void) reloadAirPlayConfig{
     if (UIScreen.screens.count == 1){return;}
     if (![self isAirPlaying] && [self isAirPlayEnabled]){
-        [SceneDelegate setExternalDisplayRenderView:_streamVideoRenderView];
+        if (@available(iOS 13.0, *)) {
+            [SceneDelegate setExternalDisplayRenderView:_streamVideoRenderView];
+        }
     }else if ([self isAirPlaying] && ![self isAirPlayEnabled]){
-        [SceneDelegate clearExternalDisplayRenderView];
+        if (@available(iOS 13.0, *)) {
+            [SceneDelegate clearExternalDisplayRenderView];
+        }
     }
 }