I am trying to get my head around the touch handling in Kobold2Ds's KKInput class. At the moment I just have some dummy methods that are checking for the three main phases of touch input, began, moving, and ended.
However the code for touches moving never seems to get called.
Here is my code. It is inside a CCNode subclass, that has a CCSprite that it is responsible for rendering and managing.
-(void) update:(ccTime)delta
{
// NSLog(#"Update");
KKInput* input = [KKInput sharedInput];
if ([input isAnyTouchOnNode:tileSprite touchPhase:KKTouchPhaseMoved])
{
NSLog(#"Tile touched moved");
}
if ([input isAnyTouchOnNode:tileSprite touchPhase:KKTouchPhaseBegan])
{
NSLog(#"Tile touched began");
self.frameNumber = #2;
}
if ([input isAnyTouchOnNode:tileSprite touchPhase:KKTouchPhaseEnded])
{
NSLog(#"Tile touched ended");
self.frameNumber = #1;
}
}
The code for KKTouchPhaseBegan and KKTouchPhaseEnded both get called, but the code for KKTouchPhaseMoved never does.
Can anyone clue me in to what i'm doing wrong?
Related
I'm trying to pass an object from an SKScene to the current UIViewController where the scene is being shown, it's like I created a label that will only be triggered once the object from the scene reached a specific location, I understand that I can just easily create a SKLabel and have it added to the scene once the object reaches the location I want it to, but I'd rather do it the ViewController style way since I'll be adding a lot of objects that will do the same thing as my app Progress, that reason step aside, I did actually tried adding an sk label to see if it will work that way, Yes I was able to see the SKLabel appear upon the object reaching let's say location.x = 50 and I set the node to be removed when the object reaches location.x = 270, But the problem is it's only doing it once, after the object being added again, it seems that the scene is not removing the node even though I'm pointing my object to hit 270..
By the way, since I mentioned 2 problems, here's the code that executes the said operation for the SKlabel node which is only happening once, I want it to execute the statement one time, everytime I hit that location
if (newLocation.x==270.00 )) {
[self addingTheLabel];
}
if (newLocation.x == 50.00) {
SKAction *removingTheNode = [SKAction removeFromParent];
[self.label runAction:removingTheNode];
}
Nevermind, was able to resolve the issue now..
For those people who might encounter this,Creating a protocol on your scene will fix the issue:
#protocol gameSceneDelegate <NSObject>
-(void)testProtocol;
-(void)testProtocol2;
#end;
#interface MyScene : SKScene
#property (weak,nonatomic) id<gameSceneDelegate> delegate;
Implement it on your scene's view controller:
#interface ViewController : UIViewController<gameSceneDelegate>
in ViewController.m you need to set first your scene as your delegate:
MyScene *scenePointer = (MyScene*) scene;
[scenePointer setDelegate:self];
and finally, implement the methods on your ViewController:
-(void)testProtocol{
NSString *sampleString2 = [[NSString alloc]initWithFormat:#"This will show when testProtocol is selected"];
self.sampleLabel.text = sampleString2;
}
-(void)testProtocol2{
NSString *sampleString3 = [[NSString alloc]initWithFormat:#"This will show when test 2 protocol is selected"];
self.sampleLabel.text = sampleString2;
}
Make an if statement inside your ViewDidLoad that if your scenePoint is the delegate do the following:
if([scenePointer delegate]){
[self testProtocol];
[self testProtocol2];
}
Now, Going to your Scene, since what I want is for the label to change whenever the SpriteNode hits a specific location, what I did is:
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
for(UITouch *touch in touches){
CGPoint location = [touch locationInNode:self];
CGPoint newLocation = CGPointMake(location.x, 450);
if (newLocation.x == 270) {
//This will trigger the method everytime the spritenode hit's this location
if([_delegate respondsToSelector:#selector(testProtocol2)]){
[_delegate performSelector:#selector(testProtocol2)];
}
}
if(newLocation.x <= 220){
newLocation.x = 220;
//This will trigger the method everytime the spritenode hit's this location
if([_delegate respondsToSelector:#selector(testProtocol)]){
[_delegate performSelector:#selector(testProtocol)];
}
}
self.spriteNode.position = newLocation;
}
}
It will now change the label every time your SpriteNode hits the location you want it to.
I hope this will help other's who are in the same concept as this.
import your appdelegate and then use
ViewController *vc = (ViewController*)[AppDelegate*)[[UIApplication sharedApplication] delegate] viewController];
to parse the object to your presented UIViewController
I am making a game in which when 2 objects (object A and B) collide, the game gets over. Object A's position changes each time update is called. Object B's position is the same. The code is:
[self enumerateChildNodesWithName:#"objA" usingBlock:^(SKNode *node, BOOL *stop) {
if ([objB intersectsNode:node])
{
[node removeFromParent];
[self GameOver];
}
The problem is: I want objA NOT to disappear after the collision. So, for that I removed [node removeFromParent]; , but since update is called again and again. My number of nodes increases and the sound that i have added never seems to end. So, what i tried was adding:
[self performSelector:#selector(pauseGame) withObject:Nil afterDelay:0.1];
-(void) pauseGame
{
self.scene.view.paused = YES;
[self performSelector:#selector(gameOver) withObject:Nil afterDelay:0.1];
}
I had to use performSelector with delay, because putting self.scene.view.paused = YES; within the update wouldn't allow me to go to gameOver. However, I do not want any delays! is there a way to do this??
Thanks
Just use a state variable in your scene which will indicate the current state.
Use this state to run updates on your scene objects.
For example (pseudocode) :
update()
if (state == GAME_PLAY) {
// Update relevant game nodes
} else if (state == GAME_OVER) {
// Update only what needs to be updated when the game is over
}
This way you do not need to stop your entire scene and add only what is relevant to the current game state
Hi Im making a cocos2d game that has a sprite flying and falling, Im trying to have a first tap touch event for example when the user touches the screen for the first time it'll start the game animation and start the physics engine. Whats happening is that when the user starts the game the sprite falls down right away, can anyone give me a hand with this?
right now Im using something like this but Im not sure how to get the physics engine to wait until the user touches the screen for the first time.
CCSprite *_pixie
CCNode *_start;
BOOL *_firstTap;
CCPhysicsNode *_physicsNode;
-(void)didLoadFromCCB{
_physicsNode.collisionDelegate = self;
_firstTap = True;
}
- (void)touchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
if(_firstTap == TRUE){
_start.visible = FALSE;
_firstTap = False;
}
//flying sounds & so on
if (!_gameOver) {
[[OALSimpleAudio sharedInstance] playEffect:MAGIC volume:0.4 pitch:1 pan:0 loop:NO];
[_pixie.physicsBody applyImpulse:ccp(0, 420.f)];
[_pixie.physicsBody applyAngularImpulse:11000.f];
_sinceTouch = 0.f;
}
}
- (void)update:(CCTime)delta {
if(_firstTap == FALSE){
float yVelocity = clampf(_pixie.physicsBody.velocity.y, -1 * MAXFLOAT, 200.f);
if ((_sinceTouch > .5f)) {
[_pixie.physicsBody applyAngularImpulse:-40000.f*delta];
}
}
}
Change
BOOL *_firstTap;
to
BOOL _firstTap; //No asterisk
And also make sure that you set _firsttap = YES in viewDidLoad functions
- (void)viewDidLoad
{
[super viewDidLoad];
_firstTap = YES;
}
Looks to me like the first touch Boolean value may not be defined until after the update code is called. You are also mixing BOOL values with bool values.
Objective-C : BOOL vs bool
I have a CCNode that contains multiple CCSprite children.
I would like to receive touch events in my parent CCNode if any of the children have been touched.
This behaviour seems like it should be supported, I may be missing something.
My solution is to setUserInteractionEnabled = YES on all children and bubble the event up to the parent.
I do this by subclassing the CCSprite class overriding their method :
- (void) touchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
[super touchBegan:touch withEvent:event];
}
I am wondering if there is a more elegant, simple and generic way of accomplishing the same behaviour ?
You could override hitTestWithWorldPos: of your 'containing' node, either calling hitTestWithWorldPos on specific children or, iterating through all children as you see fit. Perhaps something like this:
-(BOOL) hitTestWithWorldPos:(CGPoint)pos
{
BOOL hit = NO;
hit = [super hitTestWithWorldPos:pos];
for(CCNode *child in self.children)
{
hit |= [child hitTestWithWorldPos:pos];
}
return hit;
}
edit: just to be clear, then you would only need to setUserInteractionEnabled for the container, and only process the touch using the touch events of the containing node.
edit2:
so, I thought about it for a bit more and here's a quick category you can add that will enable a quick hit test for all children of a node recursively.
CCNode+CCNode_RecursiveTouch.h
#import "CCNode.h"
#interface CCNode (CCNode_RecursiveTouch)
{
}
-(BOOL) hitTestWithWorldPos:(CGPoint)worldPos forNodeTree:(id)parentNode shouldIncludeParentNode:(BOOL)includeParent;
#end
CCNode+CCNode_RecursiveTouch.m
#import "CCNode+CCNode_RecursiveTouch.h"
#implementation CCNode (CCNode_RecursiveTouch)
-(BOOL) hitTestWithWorldPos:(CGPoint)worldPos forNodeTree:(id)parentNode shouldIncludeParentNode:(BOOL)includeParent
{
BOOL hit = NO;
if(includeParent) {hit |= [parentNode hitTestWithWorldPos:worldPos];}
for( CCNode *cnode in [parentNode children] )
{
hit |= [cnode hitTestWithWorldPos:worldPos];
(cnode.children.count)?(hit |= [self hitTestWithWorldPos:worldPos forNodeTree:cnode shouldIncludeParentNode:NO]):NO; // on recurse, don't process parent again
}
return hit;
}
#end
usage would just be .. in the containing class, override hitTestWithWorldPos like this:
-(BOOL) hitTestWithWorldPos:(CGPoint)pos
{
BOOL hit = NO;
hit = [self hitTestWithWorldPos:pos forNodeTree:self shouldIncludeParentNode:NO];
return hit;
}
and of course, don't forget to include the category header.
-(void) touchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
//Do whatever you like...
//Bubble the event up to the next responder...
[[[CCDirector sharedDirector] responderManager] discardCurrentEvent];
}
I have a sprite-kit game where I need to be checking often to see if the player has lost
- (void)update:(NSTimeInterval)currentTime
{
for (SKSpriteNode *sprite in self.alienArray ) {
if (sprite.position.y < 10) {
LostScene *lostScene = [[LostScene alloc] initWithSize: CGSizeMake(CGRectGetWidth(self.view.bounds), CGRectGetHeight(self.view.bounds))];
NSLog(#"about to present");
[self.view presentScene:lostScene transition:[SKTransition fadeWithDuration:0.5]];
}
}
}
but when this method gets called (which I know is happening), no scene presents. What am I doing wrong? I believe it has something to do with the transition, because when I take it out, it works fine
You should add a property of the existing scene like: BOOL playerHasLost and edit your update method:
- (void)update:(NSTimeInterval)currentTime
{
if(!playerHasLost)
{
for (SKSpriteNode *sprite in self.alienArray )
{
if (sprite.position.y < 10)
{
playerHasLost = YES;
LostScene *lostScene = [[LostScene alloc] initWithSize: CGSizeMake(CGRectGetWidth(self.view.bounds), CGRectGetHeight(self.view.bounds))];
NSLog(#"about to present");
[self.view presentScene:lostScene transition:[SKTransition fadeWithDuration:0.5]];
break;//to get out of for loop
}
}
}
}
So this way as soon as the sprite get to position that you treat as lost position it will set the variable to YES, present the scene and it will not do it again.
The reason is simply that the update method gets called every frame, with a running transition the scene will be presented anew every frame and thus it appears as if nithing is happening. You should see the NSLog spamming the log console.