iOS "View Controller" - iphone

Question

I try to make a game but I have a "warning" that says: "IVBrickerViewController may not respond to -processCollision.
This is the code:
#import "IVBrickerViewController.h"
#implementation IVBrickerViewController
#synthesize scoreLabel;
#synthesize ball;
#synthesize paddle;
#synthesize livesLabel;
#synthesize messageLabel;
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
-(void) accelerometer:(UIAccelerometer *)accelerometer
didAccelerate:(UIAcceleration *)accel
{
float newX = paddle.center.x + (accel.x *12);
if(newX > 30 && newX <290)
paddle.center = CGPointMake(newX, paddle.center.y);
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
if (isPlaying) {
UITouch *touch = [[event allTouches] anyObject];
touchOffset = paddle.center.x -
[touch locationInView:touch.view].x;
} else {
[self startPlaying];
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
if (isPlaying) {
UITouch *touch = [[event allTouches] anyObject];
float distanceMoved =
([touch locationInView:touch.view].x + touchOffset) -
paddle.center.x;
float newX = paddle.center.x + distanceMoved;
if (newX > 30 && newX < 290)
paddle.center = CGPointMake( newX, paddle.center.y );
if (newX > 290)
paddle.center = CGPointMake( 290, paddle.center.y );
if (newX < 30)
paddle.center = CGPointMake( 30, paddle.center.y );
}
}
- (void)viewDidLoad {
[super viewDidLoad];
[self initializeBricks];
[self startPlaying];
}
- (void)initializeBricks
{
brickTypes[0] = #"bricktype1.png";
brickTypes[1] = #"bricktype2.png";
brickTypes[2] = #"bricktype3.png";
brickTypes[3] = #"bricktype4.png";
int count = 0;
for (int y = 0; y < BRICKS_HEIGHT; y++)
{
for (int x = 0; x < BRICKS_WIDTH; x++)
{
UIImage *image = [UIImage imageNamed:
brickTypes[count++ % 4]];
bricks[x][y] = [[[UIImageView alloc] initWithImage:image]
autorelease];
CGRect newFrame = bricks[x][y].frame;
newFrame.origin = CGPointMake(x * 64, (y * 40) + 100);
bricks[x][y].frame = newFrame;
[self.view addSubview:bricks[x][y]];
}
}
}
-(void)startPlaying {
if (!lives) {
lives = 3;
score = 0;
}
UIAccelerometer *theAccel = [UIAccelerometer sharedAccelerometer];
theAccel.updateInterval = 1.0f / 30.0f;
theAccel.delegate = self;
ballMovement = CGPointMake(4, 4);
[self initializeTimer];
scoreLabel.text = [NSString stringWithFormat:#"%05d", score];
livesLabel.text = [NSString stringWithFormat:#"%d", lives];
ball.center = CGPointMake(159, 239);
ballMovement = CGPointMake(4, 4);
// choose whether the ball moves left to right or right or right to left
if (arc4random() % 100 < 50)
ballMovement.x = -ballMovement.x;
messageLabel.hidden = YES;
isPlaying = YES;
[self initializeTimer];
}
-(void)pauseGame {
[theTimer invalidate];
theTimer = nil;
}
-(void)initializeTimer {
if (theTimer == nil) {
float theInterval = 1.0f/30.0f;
//I've renamed animateBall: to gamelogic
theTimer = [NSTimer scheduledTimerWithTimeInterval:theInterval target:self
selector:#selector(gameLogic) userInfo:nil repeats:YES];
}
}
-(void)gameLogic {
ball.center = CGPointMake(ball.center.x+ballMovement.x,
ball.center.y+ballMovement.y);
BOOL paddleCollision = ball.center.y >= paddle.center.y - 16 &&
ball.center.y <= paddle.center.y + 16 &&
ball.center.x > paddle.center.x - 32 &&
ball.center.x < paddle.center.x + 32;
if(paddleCollision) {
ballMovement.y = -ballMovement.y;
BOOL there_are_solid_bricks = NO;
for (int y = 0; y < BRICKS_HEIGHT; y++)
{
for (int x = 0; x < BRICKS_WIDTH; x++)
{
if (1.0 == bricks[x][y].alpha)
{
there_are_solid_bricks = YES;
if ( CGRectIntersectsRect(ball.frame, bricks[x][y].frame) )
{
[***self processCollision:bricks[x][y]];***
}
}
else
{
if (bricks[x][y].alpha > 0)
bricks[x][y].alpha -= 0.1;
}
}
}
if (!there_are_solid_bricks) {
[theTimer invalidate];
isPlaying = NO;
lives = 0;
messageLabel.text = #"You Win!";
messageLabel.hidden = NO;
}
if (ball.center.y >= paddle.center.y - 16 && ballMovement.y < 0) {
ball.center = CGPointMake(ball.center.x, paddle.center.y - 16);
} else if (ball.center.y <= paddle.center.y + 16 && ballMovement.y > 0) {
ball.center = CGPointMake(ball.center.x, paddle.center.y + 16);
} else if (ball.center.x >= paddle.center.x - 32 && ballMovement.x < 0) {
ball.center = CGPointMake(paddle.center.x - 32, ball.center.y);
} else if (ball.center.x <= paddle.center.x + 32 && ballMovement.x > 0) {
ball.center = CGPointMake(paddle.center.x + 32, ball.center.y);
}
}
if(ball.center.x > 300 || ball.center.x < 20)
ballMovement.x = -ballMovement.x;
if (ball.center.y < 32)
ballMovement.y = -ballMovement.y;
if (ball.center.y > 444) {
[self pauseGame];
isPlaying = NO;
lives--;
livesLabel.text = [NSString stringWithFormat:#"%d", lives];
if (!lives) {
messageLabel.text = #"Game Over";
} else {
messageLabel.text = #"Ball Out of Bounds";
}
messageLabel.hidden = NO;
}
if(ball.center.y > 444 || ball.center.y < 40)
ballMovement.y = -ballMovement.y;
}
- (void)processCollision:(UIImageView *)brick
{
score += 10;
scoreLabel.text = [NSString stringWithFormat:#"%d", score];
if (ballMovement.x > 0 && brick.frame.origin.x - ball.center.x <= 4)
ballMovement.x = -ballMovement.x;
else if (ballMovement.x < 0 && ball.center.x - (brick.frame.origin.x +
brick.frame.size.width) <= 4)
ballMovement.x = -ballMovement.x;
if (ballMovement.y > 0 && brick.frame.origin.y - ball.center.y <= 4)
ballMovement.y = -ballMovement.y;
else if (ballMovement.y < 0 && ball.center.y - (brick.frame.origin.y +
brick.frame.size.height) <= 4)
ballMovement.y = -ballMovement.y;
brick.alpha -= 0.1;
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)DidReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[scoreLabel release];
[ball release];
[paddle release];
[livesLabel release];
[messageLabel release];
[super dealloc];
}
#end
I HAVE TWO WARNINGS HERE AT THE #END:
{Incomplete implementation of class 'IVBrickerViewController'}.
{Method definition for'-animateBall:'not found}.
I had changed the .h file from: "-(void)animateBall:(NSTimer *)theTimer;"
to: "-(void)gameLogic:(NSTimer *)theTimer;"
but i get the same warning: "Method definition for'-gameLogic:' not found"
I would like to thank those who have tried to help me.

Answer 1

Make sure that you have
- (void)processCollision:(UIImageView *)brick;
in your IVBrickerViewController.h file.

Answer 2

Problem is in your header file (.h).
There is no correct declaration of processCollision method.
Add it to header file.