How do I use my app delegate - ios

Question

I have a method called "pauseGame:" that pauses the game and a method called "resumeGame:"
I was wondering how I would call these in my app delegate I tried a few ways but in my debugger it ended up saying "pauseGame: method not found" and i imported my class i declared them in into my app delegate I was trying to figure out how I could solve this.
Here is the code I used for it:
- (void)applicationWillResignActive:(UIApplication *)application
{
[BPGameController pauseGame:];
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
[BPGameController pauseGame:];
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
[BPGameController resumeGame:];
}

Answer 1

Try this. and make sure the method resumeGame is working fine.
- (void)applicationDidBecomeActive:(UIApplication *)application {
[super applicationDidBecomeActive:application];
[BPGameController resumeGame:];
}

Answer 2

if resumeGame doesnt take any param it should just be
[BPGameController resumeGame];
lose the ":"

Answer 3

Are your pause/resume methods class methods or instance methods, in your code example it looks like you're calling them as class methods. Can you post more concrete code?
Signatures would help.
If those methods are instance methods, what you can do is add a property to YourAppDelegate, where it might look like:
#property (nonatomic, strong) BPGameController *bpgc;
And then when you instantiate the BPGameController somewhere else, set it on the appdelegate by doing
[(*YourAppDelegate)[[UIApplication sharedApplication] delegate] setBpgc:yourBPGC];
and then in the app delegate methods, you can reference your bpgc by self.bpgc and send messages like pauseGame, etc.

Answer 4

First your code is syntatically incorrect.AS
[BPGameController pauseGame:]; //do not call pauseGame: wihout any parameter.
instead consider calling it with nil if you do not have any value
[BPGameController pauseGame:nil];
or
If you function do not need parameters than remove from method definition.
Secondly I suspect you do not have pauseGame: declared in .h file
declare it in .h file.If not
Third if you want to call pauseGame this way[BPGameController pauseGame:nil]; than your method definition should start with + instead of - something like this.
+(void)pauseGame:(id)param{
}
If you post the definition of pauseGame: it will help more
EDIT: USE
- (void)applicationWillResignActive:(UIApplication *)application{
UIViewController *controller = self.window.rootViewController;
if([controller isKindOfClass:[UINavigationController class]]){
BPGameController *bpGameController;
for (id vc in [((UINavigationController*)controller) viewControllers])
{
if ([vc isKindOfClass:[BPGameController class]])
{
[((BPGameController *) vc) pauseGame];
break;
}
}
}
else if([controller isKindOfClass:[BPGameController class]]){
[((BPGameController *) controller) pauseGame];
}else{
//Not found
}
}