ios: Lifecycle fixes:

Fix crash when pressing home button.
   Add a hack to allow exiting the running game by triple-tapping on the top center of the screen. (Less than 10% from the top, and within the middle 20%)

ios/RetroArch/RetroArch_iOS.m

@@ -21,6 +21,9 @@ extern bool ios_keys[256];
 extern uint32_t ios_current_touch_count;
 
 @implementation RetroArch_iOS
+{
+   game_view* game;
+}
 
 + (RetroArch_iOS*)get
 {
@@ -29,12 +32,15 @@ extern uint32_t ios_current_touch_count;
 
 - (void)runGame:(NSString*)path
 {
-   self.window.rootViewController = [[game_view alloc] initWithGame:path];
+   game = [[game_view alloc] initWithGame:path];
+   self.window.rootViewController = game;
    self.navigator = nil;
 }
 
 - (void)gameHasExited
 {
+   game = nil;
+
    self.navigator = [[UINavigationController alloc] init];
    [self.navigator pushViewController: [[module_list alloc] init] animated:YES];
 
@@ -74,6 +80,22 @@ extern uint32_t ios_current_touch_count;
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(keyReleased:) name: GSEventKeyUpNotification object: nil];
 }
 
+- (void)applicationWillEnterForeground:(UIApplication *)application
+{
+   if (game)
+   {
+      [game resume];
+   }
+}
+
+- (void)applicationDidEnterBackground:(UIApplication *)application
+{
+   if (game)
+   {
+      [game pause];
+   }
+}
+
 -(void) keyPressed: (NSNotification*) notification
 {
    int keycode = [[notification.userInfo objectForKey:@"keycode"] intValue];
@@ -93,19 +115,35 @@ extern uint32_t ios_current_touch_count;
 
 - (void)processTouches:(NSArray*)touches
 {
+   if (game)
+   {
       ios_current_touch_count = [touches count];
    
       for(int i = 0; i != [touches count]; i ++)
       {
          UITouch *touch = [touches objectAtIndex:i];
-      CGPoint coord = [touch locationInView:self.window.rootViewController.view];
+         CGPoint coord = [touch locationInView:game.view];
          float scale = [[UIScreen mainScreen] scale];
       
+         // Exit hack!
+         if (touch.tapCount == 3)
+         {
+            if (coord.y < game.view.bounds.size.height / 10.0f)
+            {
+               float tenpct = game.view.bounds.size.width / 10.0f;
+               if (coord.x >= tenpct * 4 && coord.x <= tenpct * 6)
+               {
+                  [game exit];
+               }
+            }
+         }
+
          ios_touches[i].is_down = (touch.phase != UITouchPhaseEnded) && (touch.phase != UITouchPhaseCancelled);
 
          ios_touches[i].screen_x = coord.x * scale;
          ios_touches[i].screen_y = coord.y * scale;
       }
+   }
 }
 
 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

ios/RetroArch/game_view.m

@@ -21,10 +21,24 @@ static float screen_scale;
 static int frame_skips = 4;
 static bool is_syncing = true;
 
+static bool active_iterate()
+{
+   while(CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true) == kCFRunLoopRunHandledSource);
+   return rarch_main_iterate();
+}
+
+static bool idle_iterate()
+{
+   CFRunLoopRunInMode(kCFRunLoopDefaultMode, .5, false);
+   return true;
+}
+
 @implementation game_view
 {
    EAGLContext *gl_context;
    NSString* game;
+   bool paused;
+   bool exiting;
 }
 
 - (id)initWithGame:(NSString*)path
@@ -36,6 +50,21 @@ static bool is_syncing = true;
    return self;
 }
 
+- (void)pause
+{
+   paused = true;
+}
+
+- (void)resume
+{
+   paused = false;
+}
+
+- (void)exit
+{
+   exiting = true;
+}
+
 - (void)dealloc
 {
    if ([EAGLContext currentContext] == gl_context) [EAGLContext setCurrentContext:nil];
@@ -67,8 +96,7 @@ static bool is_syncing = true;
    if (rarch_main_init_wrap(&main_wrapper) == 0)
    {
       rarch_init_msg_queue();
-      while (rarch_main_iterate())
+      while (!exiting && (paused ? idle_iterate() : active_iterate()));
-         while(CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true) == kCFRunLoopRunHandledSource);
       rarch_main_deinit();
       rarch_deinit_msg_queue();
       

ios/RetroArch/views.h

@@ -4,7 +4,10 @@
 #include "conf/config_file.h"
 
 @interface game_view : UIViewController
-- (id)initWithGame:(NSString*)path;
+- (id)initWithGame:(NSString*)path;\
+- (void)pause;
+- (void)resume;
+- (void)exit;
 @end
 
 @interface module_list : UITableViewController