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mattiasmak
Member
I'm having a layer for my game that is a pause screen. The problem is that when I show that layer i also call; [[Director sharedDirector] pause];
But this pauses everything including the pauselayer. Is there a way to pause a specific layer or is there another approach to this?
I may be mistaken but isn't there something new in 0.8 that allows to pause the time for a layer/node only?
Calling onExit for a particular layer will pause it and all of it's children. Likewise calling onEnter will un-pause it. I am doing this in a game we are about to release. It allows me to show a semi-transparent layer over our paused game layer.
It's a little confusing, and you need to override onEnter / onExit with some sort of paused flag to make sure the super version does not get called twice (for instance if the game is quit while paused, onExit would get called again).
- (void) onEnter
{
if(!m_paused)
{
[super onEnter];
// schedule selectors here
[self schedule:@selector(step:)];
}
}
- (void) onExit
{
if(!m_paused)
{
[super onExit];
}
}
- (void) pause
{
if(m_paused)
{
return;
}
[self onExit];
m_paused = YES;
}
- (void) unpause
{
if(!m_paused)
{
return;
}
m_paused = NO;
[self onEnter];
}
insul
Member
I solved it by calling deactivateTimers on the layer to pause and activateTimers to resume the game. Works perfect.
How? the deactivateTimers is a private method, change its type?
I do it but it doesn't work and throw a exception.
what did you do made it worked perfect?
insul
Member
I solved it by calling deactivateTimers on the layer to pause and activateTimers to resume the game. Works perfect.
How? the deactivateTimers is a private method, change its type?
I do it but it doesn't work and throw a exception.
what did you do made it worked perfect?
lgoss007
Member
I did this using a state machine. Basically in the scene I have set:
typedef enum {
kStatePaused,
kStateRunning
} SceneState;
SceneState state;
// in init function
state = kStateRunning;
// on timer callback
if (state == kStatePaused) return;
Also you need the above in ccTouchesBegan.
I am trying to get this working, but with either with SmallMike's method or mattiasmak's my sprites' actions don't get paused...
is there any workaround?
EDIT: I have noticed this: [[ActionManager sharedManager] pauseAllActionsForTarget:target];
The thing is that it doesn't seem to work recursively for every child of the target...
if i pass it an sprite its action gets paused but if i pass the layer that is parent to that sprite, its actions don't get paused...Any idea?
Yeah, you are right. This time it worked. :D
Thanks!
ccnewbies
Member
I am having problem on achieving the same objective using SmallMike method. I am using TouchDispatcher to handle all my touches. Below are the snippet of the code - mostly base on SmallMike method except that onExit, I remove the touch.
********
- (void)onExit
{
[[TouchDispatcher sharedDispatcher] removeDelegate:self];
if(!m_paused)
{
[super onExit];
}
}
-(void) pause
{
if(m_paused)
{
return;
}
[self onExit];
m_paused = YES;
}
************************************
I add the pause layer from my game layer (when a sprite got touch, it add the new layer).
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
if ([self containsTouchLocation:touch aSprite:pauseItem])
{
GamePauseLayer *layer3 = [[GamePauseLayer alloc] init];
layer3.position = ccp(115,85);
[self addChild:layer3 z:5];
NSLog(@".....................still pause..................");
[self pause];
return YES;
}
}
**********************************************
In my GamePauseLayer I had,
-(id) init {
self = [super init];
if(self != nil) {
ColorLayer *c = [ColorLayer layerWithColor:ccc4(0x00, 0x00, 0x00, 0xFF) width:250 height:150];
// c.position = ccp(115,85);
[self addChild:c];
[c setOpacity:128];
MenuItem *item1 = [MenuItemFont itemFromString:@"Resume" target:self selector:@selector(resumeGame:)];
MenuItem *item2 = [MenuItemFont itemFromString:@"Exit" target:self selector:@selector(exitGame:)];
Menu *menu = [Menu menuWithItems:item1, item2, nil];
menu.position = ccp(0,0);
[menu alignItemsVertically];
[self addChild:menu];
}
return self;
}
- (void)onEnter
{
[[TouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
NSLog(@".............I am swalloing the touches.....................");
[super onEnter];
}
- (void)onExit
{
[[TouchDispatcher sharedDispatcher] removeDelegate:self];
[super onExit];
}
**********************************************************************************************************
Issue that I had
Whenever I pause, it added the new pause layer on the scene. However, the new layer does not accept any touches. I can't figure out why the new layer does not accept any touches. Basically, new layer added and everything pause and menu item not responding to touches. My understanding is onEnter for the new pause layer will handle the touches.
Please help.
I'm not sure why pause is causing problems to begin with. I have a layer with custom menu items (just sprites that I change) and when I detect a touch on the "resume" sprite, I resume the director before I do anything else and this works. This has the same effect of doing setTimeScale on the sharedScheduler, except with pause I get automatic FPS lowering to conserve battery life..
Well I have animated stuff in my pause menu, so I'd like to keep it running... I know, some people think pausing should conserve battery, but that's what the Lock button is for! (I also set the animationInterval to 1/30)... A pause menu should still support custom actions such as button press animations and animated buttons!
I solved it by creating a category for CCNode, which hierarchically pauses all timers for all children of any CCNode. The idea of calling onExit is interesting, but I like to do stuff in onExit and onEnter that only should be done once per game instance or the lifetime of an object...
Below is my category method for CCNode: (the exception handling is because, at least before the scheduler threw an exception if you tried to resume or pause timers that were already resumed or paused...)
This works great, since it pauses all actions as well... In my game I use my own run loop for motion and collision detection, as well as actions for stuff like orbiting or fading, so it's nice to be able to pause both actions and my own run loop in one function call.
@implementation CCNode (PauseResumeStuff)
- (void)resumeTimersForHierarchy
{
for (CCNode* child in [self children])
{
[child resumeTimersForHierarchy];
}
@try {
[self resumeSchedulerAndActions];
}
@catch (NSException * e) {}
}
- (void)pauseTimersForHierarchy
{
@try {
[self pauseSchedulerAndActions];
}
@catch (NSException * e) {}
for (CCNode* child in [self children])
{
[child pauseTimersForHierarchy];
}
}
@endYou have to be careful if you start any actions after calling the above code, those actions WILL run... It's a bit of a pickle, especially when resuming a game, so you could set isRunning_ to false for your parent layer, but I just made my own runAction:paused: category function and all my objects that run actions call this function with [self isPaused]... it's not super clean, but it does work for me very well. If you don't expect this latter problem to be an issue (running actions while paused), then the above code should work very nicely for you.
I suppose one could also make a category runAction: method that checks if the node is paused and calls [[CCActionManager sharedManager] addAction:action target:self paused:paused] with that information... Might work too!
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