How can I set a timer for different game modes? - ios

Question

I am developing a game for class where a timer is ran when a button is pressed.
-(void)setTimer{
self->mTimer = [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:#selector(buttonNotPushed) userInfo: nil repeats:NO];
}
-(void)resetTimer{
[self->mTimer invalidate];
self->mTimer = nil;
Here is a snippet of how the timer code is used.
- (IBAction)yellowDot1:(id)sender {
if ([_labelColor.text isEqualToString:#"Yellow"]) {
[ self Scoring];
[self label];
[self resetTimer];
[self setTimer];
}
else ([self GameOver]);
}
- (IBAction)redDot1:(id)sender {
if ([_labelColor.text isEqualToString:#"Red"]) {
[ self Scoring];
[self label];
[self resetTimer];
[self setTimer];
}
else ([self GameOver]);
}
The game presents with a Play button which modals over to the next screen. Currently at 5 seconds, I would like to create a "difficult" mode where at the home screen, the user clicks on a "difficult" button and the timer for the game runs at 2 seconds instead. Right now, I am contemplating duplicating my storyboard and view controllers and going that way where I just make the timer a different interval. Is a shorter way possible through code for a difficult mode?

Answer 1

Simply declare a global a variable for this. Use a class (maybe a singleton) that holds the mode and use a -(float) getGameDuration; method
lets say...
// GameHandler.h
static GameHandler *sharedInstance = nil;
#interface GameHandler : NSObject
{
GameMode *mode;
}
typedef enum{
GAMEMODE_EASY = 0,
GAMEMODE_NORMAL,
GAMEMODE_HARD
} GameMode;
-(float) getGameDuration;
implementation
// GameHandler.m
+ (GameHandler *)sharedInstance // implement singleton
{};
-(float) getGameDuration
{
switch(mode)
{
case GAMEMODE_EASY:
return 10.f;
case GAMEMODE_NORMAL:
return 5.f;
case GAMEMODE_HARD:
return 2.f;
}
return 5.f;
}
// your other classes
float gameDurration = [[GameHandler sharedInstance] getGameDuration];
self->mTimer = [NSTimer scheduledTimerWithTimeInterval:gameDurration
target:self
selector:#selector(buttonNotPushed)
userInfo:nil
repeats:NO];