I am trying to move a sprite node down every time I touch in a certain area. This is the code I have and the log is showing that the touches register. What am I doing wrong and is there an easier way to accomplish this?
-(void)update:(CFTimeInterval)currentTime {
CGPoint currentLocation = [currentTouch locationInView:currentTouch.view];
if (currentLocation.y > 500) {
CGFloat newY = _bg.position.y - 25;
_bg.position = CGPointMake(_bg.position.x, newY);
NSLog(#"touchtouch");
}
Try this:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches) {
CGPoint currentLocation = [touch locationInNode:self];
if (currentLocation.y > 500) {
CGFloat newY = _bg.position.y - 25;
_bg.position = CGPointMake(_bg.position.x, newY);
NSLog(#"touchtouch");
}
}
}
You can also use an SKAction to have the movement animated:
SKAction *moveDown = [SKAction moveToY:newY duration:1];
[_bg runAction:moveDown];
Hope this can help you!
Related
I am creating game in which user can hit the object falling from the top of the screen with the racket. user can continuously move the racket but if it is at minimal speed or is at rest it should not hit the object, but if it above the minimal speed user should hit them. I have achieved that but the issue is when user start touching the racket which continously move with the user touch, the speed varition is their it does not start with the same speed and while touch is moving at that time also some times speed is very less even though the movement is fast. Here is my piece of code
-(void)didMoveToView:(SKView *)view {
self.physicsWorld.contactDelegate = (id)self;
racketNode = [SKSpriteNode spriteNodeWithImageNamed:#"racket"];
racketNode.size = CGSizeMake(50,50);
racketNode.position = CGPointMake(self.frame.origin.x + self.frame.size.width - 50,50);
racketNode.name = #"racket";
[self addChild:racketNode];
}
-(void) didBeginContact:(SKPhysicsContact *)contact {
SKSpriteNode *nodeA = (SKSpriteNode *)contact.bodyA.node ;
SKSpriteNode *nodeB = (SKSpriteNode *) contact.bodyB.node;
if (([nodeA.name isEqualToString:#"racket"] && [nodeB.name isEqualToString:#"fallingObject"])) {
if (racketNode.speed > kMinSpeed)
[nodeB removeFromParent];
else {
nodeB.physicsBody.contactTestBitMask = 0;
[self performSelector:#selector(providingCollsion:) withObject:nodeB afterDelay:0.1];
}
}
}
-(void) providingCollsion:(SKSpriteNode *) node {
node.physicsBody.contactTestBitMask = racketHit;
}
-(void) touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches) {
CGPoint location = [touch locationInNode:self];
start = location;
startTime = touch.timestamp;
racketNode.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:racketNode.frame.size];
racketNode.physicsBody.categoryBitMask = racket;
racketNode.physicsBody.contactTestBitMask = HitIt;
racketNode.physicsBody.dynamic = NO;
racketNode.physicsBody.affectedByGravity = NO;
[racketNode runAction:[SKAction moveTo:location duration:0.01]];
}
}
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
racketNode.physicsBody = nil;
racketNode.speed = 0;
}
-(void) touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
CGFloat dx = location.x - start.x;
CGFloat dy = location.y - start.y;
CGFloat magnitude = sqrt(dx*dx+dy*dy);
// Determine time difference from start of the gesture
CGFloat dt = touch.timestamp - startTime;
// Determine gesture speed in points/sec
CGFloat speed = magnitude/dt;
racketNode.speed = speed;
[handNode runAction:[SKAction moveTo:[touch locationInNode:self] duration:0.01]];
}
Please tell me which part my code is wrong so as to make same object collide with high speed only not on slow speed and also no collision on stable state.
Instead of doing it manually, use UIPanGestureRecognizer to handle your swipes. With it, there is a velocity property that you can use to check if the speed is greater than a given value.
Here is a great tutorial to do it:
https://www.raywenderlich.com/76020/using-uigesturerecognizer-with-swift-tutorial
I'm trying to make a game through sprite kit framework, but I'm stuck while trying to make a character move. I want to make the character move (left/right) when I press the key(left/right). While pressing, the character should be speeding up (w/ speed limit), and when I let go of the key, the character should be slowing down to a complete stop. I can't figure out a way to implement this through SKAction... Can anyone shed me some light? Thanks.
This is what I've tried so far.
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint touchLocation = [touch locationInNode:self];
if (touchLocation.x > [[UIScreen mainScreen]applicationFrame].size.width / 2) {
_rightPressed = YES;
} else {
_leftPressed = YES;
}
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
_rightPressed = NO;
_leftPressed = NO;
_speedDelimiter = 0;
}
-(void)update:(CFTimeInterval)currentTime {
// ... code ...
if (_rightPressed && !_leftPressed && _speedDelimiter < 10) {
SKAction * moveRight = [SKAction moveBy:CGVectorMake(10, 0) duration:5];
[self.player runAction:moveRight];
_speedDelimiter++;
} else if (_leftPressed && !_rightPressed && _speedDelimiter < 10){
SKAction * moveLeft = [SKAction moveBy:CGVectorMake(-10, 0) duration:5];
[self.player runAction:moveLeft];
_speedDelimiter++;
}
}
What I think I should make use of is the velocity property in my character's SKPhysicsBody property. But I'm not sure.
I am trying to drag a sprite in the y axis but make the sprite "stick" to the users finger depending on where the touches began on the node.
The sprite is currently dragging but it seems to be snapping the anchorpoint of the sprite to the touch location within the node.
Im assuming it has something to do with getting the location within the node by doing [touch locationInNode:selectedNode]; but I am unsure where to go from there.
Here is my current code.
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches) {
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
CGPoint newPosition = CGPointMake(node.position.x, location.y);
if ([node.name isEqualToString:self.selectedNode] ) {
if (newPosition.y > 230) {
newPosition.y = 230;
}
node.position = newPosition;
}
}
}
You need to offset the newPosition based on the current touch position on the node.
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches)
{
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if ([node.name isEqualToString:self.selectedNode] )
{
CGPoint previousLocation = [touch previousLocationInNode:self];
float diff = location.y - previousLocation.y;
CGPoint newPosition = CGPointMake(node.position.x, node.position.y + diff);
if (newPosition.y > 230) {
newPosition.y = 230;
}
node.position = newPosition;
}
}
}
There are a couple of ways of doing this. The sample code below tracks the user's touch location and moves the sprite towards that position during the update method. You can modify the code to only move on the y axis or x axis.
#implementation MyScene
{
SKSpriteNode *object1;
CGPoint destinationLocation;
}
-(id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size])
{
[self createObject];
destinationLocation = CGPointMake(300, 150);
}
return self;
}
-(void)createObject
{
object1 = [SKSpriteNode spriteNodeWithColor:[SKColor redColor] size:CGSizeMake(50, 50)];
object1.position = CGPointMake(300, 150);
[self addChild:object1];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
destinationLocation = [touch locationInNode:self.scene];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
destinationLocation = [touch locationInNode:self.scene];
}
-(void)update:(CFTimeInterval)currentTime
{
float x = fabs(object1.position.x - destinationLocation.x);
float y = fabs(object1.position.y - destinationLocation.y);
float divider = 0;
if(x > y)
{
divider = x;
} else
{
divider = y;
}
float xMove = (x/divider)*8; // change number to increase or decrease speed
float yMove = (y/divider)*8; // change number to increase or decrease speed
if(object1.position.x > destinationLocation.x)
object1.position = CGPointMake(object1.position.x-xMove, object1.position.y);
if(object1.position.x < destinationLocation.x)
object1.position = CGPointMake(object1.position.x+xMove, object1.position.y);
if(object1.position.y > destinationLocation.y)
object1.position = CGPointMake(object1.position.x, object1.position.y-yMove);
if(object1.position.y < destinationLocation.y)
object1.position = CGPointMake(object1.position.x, object1.position.y+yMove);
}
#end
I'm currently programming a small game with SpriteKit in Xcode for the iOS platform. I wrote a code which adds some SpriteNodes on 2 different "lines", so half of the nodes are moving with the y-coordinate 100 and the others with y = 200, and they're all moving from the left side to the right which an infinity loop. Now I want that the user can touch on one SpriteNode, then moves his finger to another SpriteNode, but it has to be located on another line, then removes his finger and the SpriteNode with the TOUCHBEGAN should change its y-coordinate with the TOUCHEND Node. How can I accomplish this?
-(void)add
{
SKSpriteNode *sprite2 = [SKSpriteNode spriteNodeWithImageNamed:#"test1.png"];
sprite2.position = CGPointMake(-40, self.frame.size.height / 2);
sprite2.size = CGSizeMake(100, 32);
SKSpriteNode *sprite3 = [SKSpriteNode spriteNodeWithImageNamed:#"test.png"];
sprite3.position = CGPointMake(-40, (self.frame.size.height / 2) + 90);
sprite3.size = CGSizeMake(32, 100);
[self addChild:sprite1];
[self addChild:sprite2];
SKAction *actionMove1 = [SKAction moveTo:CGPointMake(400, (self.frame.size.height / 2) - 90) duration:12];
SKAction *actionMove2 = [SKAction moveTo:CGPointMake(200, (self.frame.size.height / 2)) duration:12];
SKAction *actionMoveDone = [SKAction removeFromParent];
[sprite1 runAction:[SKAction sequence:#[actionMove1, actionMoveDone]]];
[sprite2 runAction:[SKAction sequence:#[actionMove2, actionMoveDone]]];
}
- (void)updateWithTimeSinceLastUpdate:(CFTimeInterval)timeSinceLast
{
self.lastSpawnTime += timeSinceLast;
if (self.lastSpawnTime > 2)
{
self.lastSpawnTime = 0;
[self add];
}
}
- (void)update:(CFTimeInterval)currentTime
{
CFTimeInterval timeSinceLast = currentTime - self.lastUpdateTime;
self.lastUpdateTime = currentTime;
if (timeSinceLast > 2)
{
timeSinceLast = 1.0 /60.0;
self.lastUpdateTime = currentTime;
}
[self updateWithTimeSinceLastUpdate:timeSinceLast];
}
You have to subclass SkSpriteNode:
to detect TouchEvents you have to set "userInteractionEnabled" to "YES"
to react on TouchEvents implement the touch method which fits for you needs:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{}
In this method you can change the coordinates of your sprite
add these function like that in your sksence
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent )event {
/ Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if([node.name isEqualToString:#"plane"])
{
NSLog(#"_______touch ended");
//x and y position of object at Scene
NSLog(#"%f",node.position.x);
NSLog(#"%f",node.position.y);
NSLog(#"%#",node);
}
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if([node.name isEqualToString:#"plane"])
{
NSLog(#"_______touch mobing");
}
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if([node.name isEqualToString:#"plane"])
{
NSLog(#"______touch begin");
//x and y position of object at Scene
NSLog(#"%f",node.position.x);
NSLog(#"%f",node.position.y);
NSLog(#"%#",node);
}
}
Im using Spritekit to create a game for iOS 7. The game has circles moving across the screen using this code
_enemy = [SKSpriteNode spriteNodeWithImageNamed:#"greeny"];
_enemy.position = CGPointMake(CGRectGetMidX(self.frame)+300,
CGRectGetMidY(self.frame));
_enemy.size = CGSizeMake(70, 70);
_enemy.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:35];
_enemy.physicsBody.mass = 0;
_enemy.physicsBody.categoryBitMask = Collisiongreen;
[_enemies addObject:_enemy];
NSLog(#"Enemies%lu",(unsigned long)_enemies.count);
[self addChild:_enemy];
[_enemy runAction:[SKAction moveByX:-900 y:0 duration:4]];
[self runAction:[SKAction playSoundFileNamed:#"Spawn.wav" waitForCompletion:NO]];
[self runAction:[SKAction sequence:#[
[SKAction waitForDuration:1.4],
[SKAction performSelector:#selector(move)
onTarget:self],
]]];
I would like to have it that when the user touches one of the objects moving across the screen that they can move it with their finger either up or down (thats why I'm using touches moved)
The code i have set up right now is
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
if(_dead)
return;
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
if(CGRectContainsPoint(_enemy.frame, location)){
[_enemy runAction:[SKAction moveTo:[[touches anyObject] locationInNode:self] duration:0.01]];
}
My problem is that if i touch it the object will move a few pixels but will stop right after. How can I get it to move with my finger and if i let go it will continue moving left like programed before? Thanks!!
So the trick here is that in the touchesMoved method, you want the enemy's postion set to the location of your touch. Use the touchesEnded method to execute a method that makes the enemy continue in the direction of your last touch. This is a rough non-tested example.
You need to store the difference of the current location with the previous location.
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
if(_dead)
return;
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
if(CGRectContainsPoint(_enemy.frame, location)){
someBool = False;
[_enemy setPosition:location];
changeInX = location.x - lastX;
changeInY = location.y - lastY;
lastX = location.x;
lastY = location.y;
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
someBool = True;
}
- (void)update:(NSTimeInterval)currentTime
{
...
if (someBool) {
enemy.position = CGPointMake((enemy.position.x + changeInX), (enemy.position.y + changeInY));
}
...
}