SKShapeNode are created in the firm of bubbles, which may be moved by tapping. The project works when launched on iOS 8, touches are being proceeded correctly. When launching on iOS 9, the bubbles are being created and the physics works correctly (when created, the bubbles bounce from each other). But they don’t react on tap, touchesBegan:withEvent: is not evoked. The compiler doesn’t generate an error. If someone ever faced such an issue and had solved, or knows the solution, please let me know.
That’s how I create the bubbles:
// при создании изначальное положение по горизонтали выбирается рандомно
SKShapeNode *ballPhysics = [[SKShapeNode alloc] init];
CGPathRef ballPhysicsPath = CGPathCreateWithEllipseInRect(CGRectMake( - ballRadius, - ballRadius, ballRadius * 2.f, ballRadius * 2.f), 0);
ballPhysics.path = ballPhysicsPath;
ballPhysics.position = CGPointMake(self.frame.size.width/2.f - 20.f + (arc4random() % 40), 6.f*self.frame.size.height/5.f);
ballPhysics.zPosition = 0;
// ширина линии, цвет и имя шарика
ballPhysics.lineWidth = 3;
ballPhysics.strokeColor = task.color;
ballPhysics.fillColor = [SKColor whiteColor];
ballPhysics.name = task.ballIdentifier;
// физическое тело
CGPathRef ballPhysicsBodyPath = CGPathCreateWithEllipseInRect(CGRectMake( - ballRadius - 2, - ballRadius - 2, ballRadius * 2.f + 4, ballRadius * 2.f + 4), 0);
ballPhysics.physicsBody = [SKPhysicsBody bodyWithPolygonFromPath: ballPhysicsBodyPath];
ballPhysics.physicsBody.dynamic = YES;
ballPhysics.physicsBody.restitution = 0.0f;
ballPhysics.physicsBody.mass = 0.1f;
ballPhysics.physicsBody.friction = 0.0f;
ballPhysics.physicsBody.categoryBitMask = ballCategory;
ballPhysics.physicsBody.collisionBitMask = ballCategory | funnelCategory | edgeCategory;
ballPhysics.physicsBody.contactTestBitMask = ballCategory | funnelCategory | edgeCategory;
ballPhysics.physicsBody.allowsRotation = NO;
ballPhysics.physicsBody.usesPreciseCollisionDetection = YES;
// добавляем объект на сцену
[self addChild:ballPhysics];
Method touchesBegan:withEvent:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint touchLocation = [touch locationInNode:self];
SKNode *touchedNode = [self nodeAtPoint:touchLocation];
if ([touchedNode.name hasPrefix:#"ball_"])
{
self.touch = touch;
self.selectedNode = (SKShapeNode *) touchedNode;
self.selectedNode.physicsBody.mass = 0.3f;
return;
}
// говорим делегату, что было касание между шарами
if ([self.delegateMovingBalls respondsToSelector:#selector(touchesBetweenBalls)])
[self.delegateMovingBalls touchesBetweenBalls];
}
What’s the matter?
Two main things that can causes this issue:
userInteractionEnabled is set to false
You have a view on top blocking the underlying content from receiving touches.
Related
guys!
I am following this tutorial How to make a platform game like Super Mario Brothers to create a simple platform game. In the tutorial, the character sprite's size is a about a size of a single tile, and collision detection is calculated for 8 surrounding tiles. I modified the sprite's size to be equal about 4 tiles (2x2) and calculate collisions with 12 surrounding tiles. It works fine for the bottom and right sprite's edges, but the left and upper edges a little bit overlap with an obstacle before collision occurs, that is obviously wrong.
I feel that I have some mistakes in there, but as I am quite new in Spritekit I cannot spot them. I would really appreciate if someone could help me with it. Thanks in advance.
Here is the update function for the character:
- (void)update:(NSTimeInterval)delta
{
CGPoint gravity = CGPointMake(0.0, -450.0);
CGPoint gravityStep = CGPointMultiplyScalar(gravity, delta);
CGPoint forwardMove = CGPointMake(800.0, 0.0);
CGPoint forwardMoveStep = CGPointMultiplyScalar(forwardMove, delta);
CGPoint backwardMove = CGPointMake(-800.0, 0.0);
CGPoint backwardMoveStep = CGPointMultiplyScalar(backwardMove, delta);
if (self.forwardMarch)
{
self.velocity = CGPointAdd(self.velocity, forwardMoveStep);
}
if (self.backwardMarch)
{
self.velocity = CGPointAdd(self.velocity, backwardMoveStep);
}
self.velocity = CGPointAdd(self.velocity, gravityStep);
self.velocity = CGPointMake(self.velocity.x * 0.9, self.velocity.y);
// setup minimum and maximum limits for the motion speed
CGPoint minMovement = CGPointMake(0.0, -450);
CGPoint maxMovement = CGPointMake(0.0, 0.0);
// forward motion
if (self.velocity.x >= 0)
{
minMovement = CGPointMake(0.0, -450);
maxMovement = CGPointMake(120.0, 250.0);
}
// backward motion
if (self.velocity.x < 0)
{
minMovement = CGPointMake(-120.0, -450);
maxMovement = CGPointMake(0.0, 250.0);
}
self.velocity = CGPointMake(Clamp(self.velocity.x, minMovement.x, maxMovement.x), Clamp(self.velocity.y, minMovement.y, maxMovement.y));
CGPoint velocityStep = CGPointMultiplyScalar(self.velocity, delta);
self.newPosition = CGPointAdd(self.position, velocityStep);
}
This function find the bounding box of the sprite
- (CGRect)collisionBoundingBox
{
CGPoint diff = CGPointSubtract(self.newPosition, self.position);
return CGRectOffset(self.frame, diff.x, diff.y);
}
And the function where I handle collisions
- (void)handleObstacleCollisionsForPlayer:(Player *)player forLayer:(TMXLayer *)layer
{
NSInteger indices[12] = {13, 14, 1, 2, 4, 8, 7, 11, 0, 3, 12, 15};
player.onGround = NO;
for (NSUInteger i = 0; i < 12; i++)
{
NSInteger tileIndex = indices[i];
CGRect playerRect = [player collisionBoundingBox];
CGPoint playerCoord = [layer coordForPoint:player.newPosition];
NSInteger tileColumn = tileIndex % 4;
NSInteger tileRow = tileIndex / 4;
CGPoint tileCoord = CGPointMake(playerCoord.x + (tileColumn - 1), playerCoord.y + (tileRow - 1));
NSInteger gid = [self tileGIDAtTileCoord:tileCoord forLayer:layer];
if (gid)
{
CGRect tileRect = [self tileRectFromTileCoords:tileCoord];
if (CGRectIntersectsRect(playerRect, tileRect))
{
CGRect intersection = CGRectIntersection(playerRect, tileRect);
if (tileIndex == 13 || tileIndex == 14)
{
//tile is below
player.newPosition = CGPointMake(player.newPosition.x, player.newPosition.y + intersection.size.height);
player.velocity = CGPointMake(player.velocity.x, 0.0);
player.onGround = YES;
}
else if (tileIndex == 1 || tileIndex == 2)
{
//tile is directly above
player.newPosition = CGPointMake(player.newPosition.x, player.newPosition.y - intersection.size.height);
}
else if (tileIndex == 4 || tileIndex == 8)
{
//tile is left
player.newPosition = CGPointMake(player.newPosition.x + intersection.size.width, player.newPosition.y);
}
else if (tileIndex == 7 || tileIndex == 11)
{
//tile is right
player.newPosition = CGPointMake(player.newPosition.x - intersection.size.width, player.newPosition.y);
}
}
}
}
player.position = player.newPosition;
}
inside your GameViewController.m enable debug physics mode
that will draw a thick outline around every box and give u exact information about collision tiles may i think either your hero or tile sizes are differ than the tutorial you following
skView.showsPhysics= YES;
i will like to know how to do a dual slider in the attached image.
i am looking at this codes to modified it. i will like to know how to have 2 slider to allow user to choose the desired time.
The problem i encounter are how do i have 2 slider to show something like the image?
http://www.cocoacontrols.com/controls/tb_circularslider
any comment are greatly appreciated here.
for the dual slider positions you have this excerpt in code
CGContextAddArc(imageCtx, self.frame.size.width/2 , self.frame.size.height/2, radius, 0, ToRad(self.angle), 0);
the first zero (0) is the starting point, so you want to use a different angle here
CGContextAddArc(imageCtx, self.frame.size.width/2 , self.frame.size.height/2, radius, ToRad(self.startAngle), ToRad(self.endAngle), 0);
(you need those two ivar's in your header of course)
EDIT: here is the edited code to find the nearest knob and lock it for modification. The old code didn't locked it, so it would change upon hover from one knob to another.
First of all add the enum above your implementation:
enum SliderLockType {
SliderLockedNone = 0,
SliderLockedStart,
SliderLockedEnd
};
#pragma mark - Implementation -
#implementation TBCircularSlider
enum SliderLockType sliderLock;
// … some code here …
//Initialize the Angle at 0
//self.startAngle = 0;
//self.endAngle = 270;
/** Tracking is started **/
-(BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event{
[super beginTrackingWithTouch:touch withEvent:event];
// find nearest knob …
CGPoint lastPoint = [touch locationInView:self];
CGPoint pStart = [self centerPointFromAngel:self.startAngle];
CGPoint pEnd = [self centerPointFromAngel:self.endAngle];
float diffA = [self distanceBetween:lastPoint and:pStart];
float diffB = [self distanceBetween:lastPoint and:pEnd];
// … and lock it
if (diffA <= TB_LINE_WIDTH) { // the tolerance is the width of the circle
sliderLock = SliderLockedStart;
} else if (diffB <= TB_LINE_WIDTH) {
sliderLock = SliderLockedEnd;
}
//We need to track continuously
return YES;
}
// continueTrackingWithTouch:withEvent: stays unchanged
/** Track is finished **/
-(void)endTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event{
[super endTrackingWithTouch:touch withEvent:event];
// reset the lock before starting a new touch event
sliderLock = SliderLockedNone;
}
- (CGPoint)centerPointFromAngel:(int)angleInt {
CGPoint point = [self pointFromAngle:angleInt];
point.x += TB_LINE_WIDTH/2;
point.y += TB_LINE_WIDTH/2;
return point;
}
- (CGFloat)distanceBetween:(CGPoint)p1 and:(CGPoint)p2 {
CGFloat xDist = (p2.x - p1.x);
CGFloat yDist = (p2.y - p1.y);
return sqrt((xDist * xDist) + (yDist * yDist));
}
// … some more code …
- (void)drawTheHandle:(CGContextRef)ctx {
CGContextSaveGState(ctx);
//I Love shadows
CGContextSetShadowWithColor(ctx, CGSizeMake(0, 0), 3, [UIColor blackColor].CGColor);
//Get the handle position!
CGPoint handleCenterA = [self pointFromAngle: self.startAngle];
CGPoint handleCenterB = [self pointFromAngle: self.endAngle];
//Draw It!
[[UIColor colorWithWhite:1.0 alpha:0.7]set];
CGContextFillEllipseInRect(ctx, CGRectMake(handleCenterA.x, handleCenterA.y, TB_LINE_WIDTH, TB_LINE_WIDTH));
CGContextFillEllipseInRect(ctx, CGRectMake(handleCenterB.x, handleCenterB.y, TB_LINE_WIDTH, TB_LINE_WIDTH));
CGContextRestoreGState(ctx);
}
- (void)movehandle:(CGPoint)lastPoint {
//Get the center
CGPoint centerPoint = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
//Calculate the direction from the center point to an arbitrary position.
float currentAngle = AngleFromNorth(centerPoint, lastPoint, NO);
int angleInt = 360 - floor(currentAngle);
if (sliderLock == SliderLockedStart) {
self.startAngle = angleInt;
} else if (sliderLock == SliderLockedEnd) {
self.endAngle = angleInt;
}
//Redraw
[self setNeedsDisplay];
}
the result:
EDIT2: if you like to have the slider switching from hour to hour you can modify the movehandle: method as follows:
int angleInt = (int)(360 - floor(currentAngle)) / 30 * 30; // 360/30 = 12 -> hours
if (sliderLock == SliderLockedStart && angleInt%360 != self.endAngle%360) {
self.startAngle = angleInt;
} else if (sliderLock == SliderLockedEnd && angleInt%360 != self.startAngle%360) {
self.endAngle = angleInt;
}
I designed an app where the user taps the ball as many times as they can within 30 seconds called iTapping. In the game, the user is able to tap anywhere on the screen for the ball to be tapped. I thought of editing the app so that there would be 'dead spots' where the user would not be able to tap the ball. For example, if the ball is in the upper right-hand corner (lets say in an area of about 100 sq. pts.), and the user taps the ball nothing happens. How would I code this? Please let me know if this is not clear enough.
Here is the .m file:
CGPoint Destination;
CGFloat xamt, yamt;
CGFloat speed21 = 40;
CGFloat xMin21 = 24;
CGFloat xMax21 = 297;
CGFloat yMin21 = 74;
CGFloat yMax21 = 454;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if ([self Intersecting:location :Ball]) {
number21++;
int xRange = xMax21 - xMin21;
int yRange = yMax21 - yMin21;
int xRand = (arc4random() % xRange) + xMin21;
int yRand = (arc4random() % yRange) + yMin21;
Destination = CGPointMake(xRand, yRand);
xamt = ((Destination.x - Ball.center.x) / speed21);
yamt = ((Destination.y - Ball.center.y) / speed21);
if (number21 == 65) {
[timer invalidate];
}
}
}
-(BOOL)Intersecting:(CGPoint)loctouch:(UIImageView *)enemyimg {
CGFloat x1 = loctouch.x;
CGFloat y1 = loctouch.y;
CGFloat x2 = enemyimg.frame.origin.x;
CGFloat y2 = enemyimg.frame.origin.y;
CGFloat w2 = enemyimg.frame.size.width;
CGFloat h2 = enemyimg.frame.size.height;
if ((x1>x2)&&(x1<x2+w2)&&(y1>y2)&&(y1<y2+h2))
return YES;
else
return NO;
}
I suggest to put the touch management back to the ball itself (see this answer). So whenever a touch is received, you can be sure it's clicking on the ball. All you need to do is to check whether the ball is currently in the dead zone, thus ignore the touch.
In my iPhone App I want to implemented functionality as shown below
user can pick a shape(an image) from one view and put in other view
How can I achieve this?
Easiest way is to use a UIPanGestureRecognizer. That will give you messages when the view is moved and when it is dropped. When it is moved, update its center. When it is dropped, check if its position is within the bounds of the view you want to drop in. (You might need to convert coordinates to the target view's coordinate system.) If it is, do the appropriate action.
Try below link drag and drop image around the screen
also try this
You can refer to the previous post which will definitely help you to achieve this functionality...
Basic Drag and Drop in iOS
Building drag and drop interface on iphone
iPhone drag/drop
For all of above link, You have to keep in mind that You need to first get TouchesBegin event for any Control and then you have to get the TouchesMoved event for same control.
In TouchesMoved event, you just have to get the center point (CGPoint) of the Control. And when you release the control will be set at that CGPoint. If this creates problem then you can take that CGPoint in variable and set that Point in TouchesEnded event.
For your case, i think you must have to maintain the Hierarchy of the Views...Else while dragging you view may not be visible...
FOR MORE CODING PART :
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
NSLog(#"%f,%f", self.center.x, self.center.y);
CGPoint newLoc = CGPointZero;
newLoc = [self.mainView convertPoint:[[touches anyObject] locationInView:self.superview] toView:self.superview];
float newX = newLoc.x + self.superview.frame.origin.x + (self.frame.size.width /2) + [[touches anyObject] locationInView:self].x ;
float newY = newLoc.y - (((UIScrollView *)self.superview).contentOffset.y *2) ;
NSLog(#"content offset %f", ((UIScrollView *)self.superview).contentOffset.y);
self.scrollParent.scrollEnabled = NO;
NSLog(#"%f,%f", self.center.x, self.center.y);
newLoc = CGPointMake(newX, newY);
[self.superview touchesCancelled:touches withEvent:event];
[self removeFromSuperview];
NSLog(#"%f,%f", self.center.x, self.center.y);
self.center = CGPointMake(newLoc.x, newLoc.y);
[self.mainView addSubview:self];
NSLog(#"%f,%f", self.center.x, self.center.y);
[self.mainView bringSubviewToFront:self];
isInScrollview = NO;
}
-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[UIView beginAnimations:#"stalk" context:nil];
[UIView setAnimationDuration:.001];
[UIView setAnimationBeginsFromCurrentState:YES];
UITouch *touch = [touches anyObject];
self.center = [touch locationInView: self.superview];
[UIView commitAnimations];
if ((self.center.x + (self.frame.size.width / 2)) > 150 && hasExitedDrawer && !self.scrollParent.dragging ) {
self.scrollParent.scrollEnabled = NO;
[self.delegate moveItemsDownFromIndex: ((self.center.y + (self.scrollParent.contentOffset.y)) / 44) + 1 ];
//NSLog(#"%i", ((self.center.y + (self.scrollParent.contentOffset.y *2)) / 44) + 1);
}
if (self.center.x + (self.frame.size.width / 2) < 150) {
hasExitedDrawer = YES;
}
}
-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if ((self.center.x + (self.frame.size.width / 2)) > 150 && hasExitedDrawer && !self.scrollParent.dragging ) {
CGPoint newLoc = CGPointZero;
newLoc = [self.scrollParent convertPoint:[[touches anyObject] locationInView:self.superview] toView:self.superview];
float newY = newLoc.y + (self.scrollParent.contentOffset.y *2);
[self.scrollParent insertSubview:self atIndex:((self.center.y + (self.scrollParent.contentOffset.y)) / 44) ];
self.frame = CGRectMake(0, newY, self.frame.size.width, self.frame.size.height);
isInScrollview = YES;
hasExitedDrawer = NO;
}
}
This code may cantains some irrelevant but gives you more idea...
You can use below open source libraries:
Library 1 OBDragDrop
Library 2 AJWDraggableDroppable
Library 3 iOS-DragAndDrop
Library 4 ios-drag-and-drop
Adding drag and drop component to iOS app the Question
i thing you are going to Build a feature like Add to cart in Most of the Shopping Apps like Amazon, Flip kart and etc..
Three step solution
1) u'll have to implement/listen for touch events
2) implement dragging and touch events
3) and then manage movetosuperview method.
I've created a simple cocos2d iPhone game that has a CCParticleSystemQuad emitter that emits particles across the scene that are shaped like leaves, to give the illusion of wind.
Right now, the wind (gravity) is blowing across the scene from right to left. I am currently stuck trying to figure out how to update the emitter.gravity to switch from (-500, 80) to (500, 80), hopefully without removing the particles that have already been drawn.
In this example, I'd like the switch to occur on a touch event that happens anywhere on the screen.
What should my touch event look like?
How do I detect a touch that happens any where on the screen?
I've also never implemented a scheduled update loop. Is this the direction I should be thinking? And I suppose a more basic question is, am I going about this the right way?
Here's the code I've got so far:
My init:
-(id) init
{
if( (self=[super init])) {
CCSprite * sky = [CCSprite spriteWithFile:#"sky.png"];
[self addChild:sky z:0 tag:1];
windDirection = -200;
[self leaveEmitters];
}
return self;
}
My leaveEmiiters function
-(void) leaveEmitters{
NSLog(#"The wind is :%i", windDirection);
CCParticleSystemQuad * emitter;
emitter = [[CCParticleSystemQuad alloc] initWithTotalParticles:100];
emitter.texture = [[CCTextureCache sharedTextureCache] addImage: #"particlesLeaves.png"];
emitter.emitterMode = kCCParticleModeGravity;
emitter.duration = -1;
emitter.gravity = ccp(windDirection, -80);
emitter.angle = 0;
emitter.angleVar = 360;
emitter.speed = 10;
emitter.speedVar = 100;
emitter.radialAccelVar = 0;
emitter.tangentialAccel = 0;
emitter.tangentialAccelVar = 0;
emitter.life = 10;
emitter.lifeVar = 0;
emitter.startSpin = 0;
emitter.startSpinVar = 360;
emitter.endSpin = 0;
emitter.endSpinVar = 720;
ccColor4F startColorVar = {255, 100, 0, 0};
ccColor4F startColor = {0, 240,0, 255};
emitter.startColor = startColor;
emitter.startColorVar = startColorVar;
emitter.endSize = emitter.startSize;
emitter.startSize = 60.0f;
emitter.emissionRate = 3;
emitter.blendAdditive = NO;
emitter.position = ccp(500,250);
[self addChild: emitter z:10];
emitter.autoRemoveOnFinish = YES;
CCParticleSystemQuad * emitter2;
emitter2 = [[CCParticleSystemQuad alloc] initWithTotalParticles:100];
emitter2.texture = [[CCTextureCache sharedTextureCache] addImage: #"particlesLeaves.png"];
emitter2.emitterMode = kCCParticleModeGravity;
emitter2.duration = -1;
emitter2.gravity = ccp(windDirection, 0);
emitter2.angle = 0;
emitter2.angleVar = 360;
emitter2.speed = 10;
emitter2.speedVar = 100;
emitter2.radialAccelVar = 0;
emitter2.tangentialAccel = 0;
emitter2.tangentialAccelVar = 0;
emitter2.life = 10;
emitter2.lifeVar = 0;
emitter2.startSpin = 0;
emitter2.startSpinVar = 360;
emitter2.endSpin = 0;
emitter2.endSpinVar = 720;
emitter2.startColor = startColor;
emitter2.endSize = emitter.startSize;
emitter2.startSize = 60.0f;
emitter2.emissionRate = 3;
emitter2.blendAdditive = NO;
emitter2.position = ccp(-500,250);
[self addChild: emitter2 z:10];
emitter2.autoRemoveOnFinish = YES;
}
And finally, my ccTouchesBegan function, which isn't working at all. Why?
-(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
int x = location.x;
int y= location.y;
CCSprite * sky = (CCSprite *) [self getChildByTag:1];
sky.anchorPoint = ccp(0, 0);
CGRect skyHitBox = CGRectMake(sky.position.x, sky.position.y, 500, 500);
if (CGRectContainsPoint(skyHitBox, location)) {
NSLog(#"touch accepted: x: %i y:%i", x, y);
}
}
Any help, feedback, or suggested learning direction would be GREATLY appreciated. Thanks so much!
EDIT: I answered my own questions like 20 seconds after I posted this...
If someone wants to post their own answers, I'll leave this up for 7 more hours.
you just can keep a CCParticleSystemQuad * emitter as private instance member so you can modify emitter.gravity inside the ccTouchesBegan
i didnt get exactly what kind of wind effect you'r trying to achieve. If you want to simply switch from one 500,80 to -500,80 its pretty easy
emitter.gravity = ccp(-emitter.gravity.x, emitter.gravity.y);
If you want to change the wind direction based on witch side of the skybox you hit, with hitting the center equal no wind, and more your touch is far from the center the stronger the wind will get.
I didnt try this but should be a good starting point.
You first need to get get the touched point in skybox coordinates
CGPoint skyTouchedPoint = ccp( x - sky.position.x, y - sky.position.y)
then you can define the center point of you sky box as
CGPoint skyCenterPoint = ccp(sky.size.width/2, sky.size.height/2);
and get a vector pointing to the right side, if you touch the right half side of the skybox and pointing left if you touch the left half side of the skybox
CGPoint windDirection = ccpSub(skyTouchedPoint, skyCenterPoint);
this vector module is higher the more far from the center you touch happened, you should now increase this vector module by a factor that suites for you with
windDirection = ccpMult(windDirection, 10.f); //try different values here
now you can use only the x component of this vector if you want the wind to use always the same y (as you posted the value of 80)