The bellow code is not repeating inspite of explicitly setting the SKAction as repeatActionForever.
SKAction *action = [SKAction moveToY:self.frame.size.height + bullet.size.height duration:2];
SKAction *remove = [SKAction removeFromParent];
SKAction *fireForever = [SKAction repeatActionForever:[SKAction sequence:#[action,remove]]];
[bullet runAction:fireForever];
The bullet just fires once , when its expected to be fired every 1 second.
You are removing the bullet from the parent, that's why it's not firing again,
What you should do is create a method to create a bullet - fire it - destroy it, and create an SKAction that uses this method.
-(void)FireBullet
{
//create bullet
//fire it
//remove from parent
}
and add the following code when you want the bullets to start firing.
SKAction *myAction = [SKAction performSelector:#selector(FireBullet) onTarget:self];
SKAction *forever = [SKAction repeatActionForever:myAction];
[self runAction:forever];
Hope this helps, let me know if you need more help.
Related
Ok I'm fairly new to coding with sprite kit so I don't know too much. I'm trying to make 5 bricks spawn above the scene and then slide down into the scene every 5 seconds. I thought this code would work but it does absolutely nothing to my scene.
I have another method that has bricks already loaded into the scene and that works so I don't think that would affect this much but not really sure.
-(void) spawnMoreBricks:(CGSize)size {
for (int i = 0; i < 5; i++) {
SKSpriteNode *brick = [SKSpriteNode spriteNodeWithImageNamed:#"brick"];
//resize bricks
brick.size = CGSizeMake(60, 30);
//position it
brick.position = CGPointMake(self.size.width/2, self.size.height);
SKAction *wait = [SKAction waitForDuration:5];
SKAction *spawn = [SKAction scaleTo:1 duration:0];
SKAction *move = [SKAction moveByX:0 y:-80 duration:3];
SKAction *spawnSequence = [SKAction sequence:#[wait, spawn, move]];
[self runAction:spawnSequence];
}
}
SKAction *wait = [SKAction waitForDuration:5];
SKAction *spawn = [SKAction runBlock:^{[self addChild: brick];
SKAction *move = [SKAction moveByX:0 y:-80 duration:3];
[brick runAction: move];
}];
SKAction *spawnSequence = [SKAction sequence:#[wait, spawn]];
[self runAction:spawnSequence];
Here is a modified set of actions to use. The problem was that you were running all the actions on the scene itself. The code provided runs a sequence on the scene that waits 5 seconds (acting as the delay), and then runs a spawn action. runBlock allows us to add the brick to the scene, create the move action, and apply that action to the brick (not the scene)
I have a sequence of SKActions that I would like to play but they do not play properly. The eye only closes and never opens again. I have no clue why this is occurring but maybe you do! Help is appreciated, thank you.
-(void)blink {
SKAction *delay = [SKAction waitForDuration:3];
SKAction *blinkEye = [SKAction resizeToHeight:1 duration:.2];
SKAction *delay2 = [SKAction waitForDuration:.5];
SKAction *openEye = [SKAction resizeToHeight:3 duration:.2];
SKAction *group1 = [SKAction group:#[delay,blinkEye]];
SKAction *group2 = [SKAction group:#[delay2,openEye]];
SKAction *all = [SKAction sequence:#[group1,group2]];
SKAction *repeat = [SKAction repeatActionForever:all];
[self runAction:repeat];
}
In MyScene.m
-(void)update:(CFTimeInterval)currentTime {
/* Called before each frame is rendered */
Player *player = (Player *)[self childNodeWithName:#"player"];
Player *lefteye = (Player *)[player childNodeWithName:#"leye"];
Player *righteye = (Player *)[player childNodeWithName:#"reye"];
[lefteye blink];
[righteye blink];
}
There's no need for grouping, it's causing the problem.
SKAction *delay = [SKAction waitForDuration:3];
SKAction *blinkEye = [SKAction resizeToHeight:1 duration:.2];
SKAction *delay2 = [SKAction waitForDuration:.5];
SKAction *openEye = [SKAction resizeToHeight:3 duration:.2];
SKAction *all = [SKAction sequence:#[delay,blinkEye, delay2,openEye]]];
And letting blink the eye on every frame update can't work. This function is called up to 60 times a second.
Instead do it like this on creation of the eye object:
SKAction *delay = [SKAction waitForDuration:3];
SKAction *blinkEye = [SKAction resizeToHeight:1 duration:.2];
SKAction *delay2 = [SKAction waitForDuration:.5];
SKAction *openEye = [SKAction resizeToHeight:3 duration:.2];
SKAction *all = [SKAction sequence:#[delay,blinkEye, delay2,openEye]]];
//create the lefteye object
lefteye = [[Eye alloc] init...];
//create the righteye object
righteye = [[Eye alloc] init...];
[lefteye repeatActionForever:all];
I am trying to run a group where there is an animation and a method running together. I am repeating it forever but the method is not getting executed
SKAction *animation1 = [SKAction animateWithTextures:texturesSnakeShoot timePerFrame:0.2];
SKAction *group = [SKAction group:#[animation1, [SKAction runBlock:^{
[self shootProjectileFrom:spotty.position to:
CGPointMake(-10, spotty.position.y)];
}]]];
[spotty runAction : [SKAction repeatActionForever:group]];
the method is getting called only once and animation is repeating. Why is that?
I'm still fairly new to programming and what I tried to do is the following: So I separated my Enemies from my game scene to a different class.
In the Enemy class.m file I declared 6 methods. Every method represents a new level, which will get called from the game scene.
So in the methods I declare the sprite's image, path, shooting particle type, etc..
Here's an example of the level 1 method in the EnemyClass.m file:
+(void)enemiesLevel1
{
EnemyName = #"enemy1";
SKSpriteNode* enemy = [SKSpriteNode spriteNodeWithImageNamed:EnemyName];
pathSpeed = 3;
CGPathRef path = CGPathCreateWithEllipseInRect(CGRectMake(0,0,400,400), NULL);
SKAction *followTrack = [SKAction followPath:path
asOffset:NO
orientToPath:YES
duration:pathSpeed];
SKAction *forever = [SKAction repeatActionForever:followTrack];
SKAction *addEnemy = [SKAction runBlock:^{
[GameScene addChild: enemy];
}];
SKAction *enemySequence = [SKAction sequence:#[addEnemy, forever]];
[GameScene runAction: enemySequence];
}
However, Xcode is states two issues:
No known class method for selector "addChild"
and
No known class method for selector "runAction"
I'm calling the method from GameScene.m with:
[EnemyClass enemiesLevel1]
It may seem like a dumb question, but I am still new and I would greatly appreciate any help!
The problem is, you should create instance of EnemyClasss in your GameScene and then use it; your code should look like this;
In EnemyClass.m:
-(void)enemiesLevel1
{
EnemyName = #"enemy1";
SKSpriteNode* enemy = [SKSpriteNode spriteNodeWithImageNamed:EnemyName];
pathSpeed = 3;
CGPathRef path = CGPathCreateWithEllipseInRect(CGRectMake(0,0,400,400), NULL);
SKAction *followTrack = [SKAction followPath:path
asOffset:NO
orientToPath:YES
duration:pathSpeed];
SKAction *forever = [SKAction repeatActionForever:followTrack];
SKAction *addEnemy = [SKAction runBlock:^{
[self addChild: enemy];
}];
SKAction *enemySequence = [SKAction sequence:#[addEnemy, forever]];
[self runAction: enemySequence];
}
In GameScene.m:
EnemyClass *enemy= [[EnemyClass alloc] initWithSize:self.size];
and then you can use:
[self addChild: [enemy enemiesLevel1]];
I have two different SKSpriteNodes. The first is stationary and the second, I would like, to move around the first node. I have my second node is flying in from off screen with a zPosition of 11 (the first node has a zPosition of 10). When the second node flies to the opposite end of the screen, I have the node flip and fly back across. At this time I would like to change the zPosition to 9.
witch.position = CGPointMake(self.size.width + 200, self.size.height / 2 + 50);
witch.zPosition = 11;
[self addChild:witch];
SKAction *moveLeft = [SKAction moveToX:-200 duration:8];
SKAction *moveRight = [SKAction moveToX:self.size.width + 200 duration:8];
SKAction *moveDown = [SKAction moveToY:secondNode.position.y - 50 duration:0.3];
SKAction *moveUp = [SKAction moveToY:secondNode.position.y + 50 duration:0.3];
SKAction *flipRight = [SKAction scaleXTo:-1 duration:0];
SKAction *flipLeft = [SKAction scaleXTo:1 duration:0];
[secondNode runAction:
[SKAction repeatActionForever:
[SKAction sequence:
#[moveLeft, moveDown, flipRight, CHANGEZPOSITIONHERE, moveRight, moveUp, flipLeft, CHANGEZPOSITIONHERE]]]];
How would I go about changing the zPosition in the middle of an SKAction?
Thank you in advance for all suggestions and help.
This answer was found due to LearnCocos2D comment.
Adding a runBlock:action I was able to change the zPosition. The final code is:
[secondNode runAction:
[SKAction repeatActionForever:
[SKAction sequence:
#[moveLeft, moveDown, flipRight,
[SKAction runBlock:(dispatch_block_t)^(){
secondNode.zPosition = 9;
}], moveRight, moveUp, flipLeft,
[SKAction runBlock:(dispatch_block_t)^(){
secondNode.zPosition = 11;
}]]]]];