How do I make ball disappear?

[cobroke]

I am trying to make the ball disappear when it goes over a hole. I am getting a "method undeclared" error for my makeBallDisappear. Not sure what I am doing wrong.

.h file
#import <UIKit/UIKit.h>
#define BALL_RADIUS 25
#define RHOLE_RADIUS 40
#define BHOLE_RADIUS 40

@interface AccelViewController : UIViewController <UIAccelerometerDelegate>{
IBOutlet UIImageView *ball;
IBOutlet UIImageView *ball2;
IBOutlet UIImageView *redhole;
IBOutlet UIImageView *bluehole;
IBOutlet UIImageView *bkgrnd;
IBOutlet UILabel *score;
IBOutlet UILabel *scoreLabel;

float valueX;
float valueY;
float valueA;
float valueB;

}

-(void)makeBallDisappear;

@end


.m file

#import "AccelViewController.h"
#import "Math.h"
@implementation AccelViewController


-(void)accelerometer: (UIAccelerometer *)accelerometer didAccelerate: (UIAcceleration *)acceleration {
valueX = acceleration.x*40.0;
valueY = acceleration.y*40.0;

int newX = (int)(ball.center.x +valueX);
if (newX > 320-BALL_RADIUS)
newX = 320-BALL_RADIUS;
if (newX< 0+BALL_RADIUS)
newX = 0+ BALL_RADIUS;

int newY = (int)(ball.center.y - valueY);
if (newY > 460-BALL_RADIUS)
newY =460-BALL_RADIUS;
if (newY <0+BALL_RADIUS)
newY = 0+BALL_RADIUS;

CGPoint newCenter = CGPointMake(newX, newY);

ball.center = newCenter;

valueA = acceleration.x*17.0;
valueB = acceleration.y*17.0;

int newA = (int)(ball2.center.x +valueA);
if (newA > 320-BALL_RADIUS)
newA = 320-BALL_RADIUS;
if (newA< 0+BALL_RADIUS)
newA = 0+ BALL_RADIUS;

int newB = (int)(ball2.center.y -valueB);
if (newB > 460-BALL_RADIUS)
newB =460-BALL_RADIUS;
if (newB <0+BALL_RADIUS)
newB = 0+BALL_RADIUS;


CGPoint aNewCenter = CGPointMake(newA, newB);

ball2.center = aNewCenter;

-(void)makeBallDisappear{
{

if fabs(redhole.x-ball.valueX < RHOLE_RADIUS-BALL_RADIUS)
&&
fabs(redhole.y-ball.valueY < BHOLE_RADIUS-BALL_RADIUS)

{

[view ball.visible = NO];
}
}}

Thank you for your help!

-R

[smithdale87]

Looks to me like you're missing an ending '}' at the end of your accelerometer method in the .m

[cobroke]

Originally Posted by smithdale87

Looks to me like you're missing an ending '}' at the end of your accelerometer method in the .m

You are def right that I was missing that bracket. I put it in and still getting errors.

These are my new errors:

1. Expected "(" before 'fabs'
2. Request for member 'x' in something not a structure or union
3. Request for member 'y' in something not a structure or union
4. Request for member 'value' in something not a structure or union
5. Expected ':' before '{' token

is my method written correctly for "makeBallDisappear" ?

is this a sufficient declaration in the .h file or do I need to put in the method parameters?
-(void)makeBallDisappear;


#import "AccelViewController.h"
#import "Math.h"

@implementation AccelViewController


-(void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
valueX = acceleration.x*40.0;
valueY = acceleration.y*40.0;

int newX = (int)(ball.center.x +valueX);
if (newX > 320-BALL_RADIUS)
newX = 320-BALL_RADIUS;
if (newX< 0+BALL_RADIUS)
newX = 0+ BALL_RADIUS;

int newY = (int)(ball.center.y - valueY);
if (newY > 460-BALL_RADIUS)
newY =460-BALL_RADIUS;
if (newY <0+BALL_RADIUS)
newY = 0+BALL_RADIUS;

CGPoint newCenter = CGPointMake(newX, newY);

ball.center = newCenter;

valueA = acceleration.x*17.0;
valueB = acceleration.y*17.0;

int newA = (int)(ball2.center.x +valueA);
if (newA > 320-BALL_RADIUS)
newA = 320-BALL_RADIUS;
if (newA< 0+BALL_RADIUS)
newA = 0+ BALL_RADIUS;

int newB = (int)(ball2.center.y -valueB);
if (newB > 460-BALL_RADIUS)
newB =460-BALL_RADIUS;
if (newB <0+BALL_RADIUS)
newB = 0+BALL_RADIUS;


CGPoint aNewCenter = CGPointMake(newA, newB);

ball2.center = aNewCenter;
}

-(void)makeBallDisappear
{


if fabs(redhole.x-ball.valueX < RHOLE_RADIUS-BALL_RADIUS)
&&
fabs(redhole.y-ball.valueY < BHOLE_RADIUS-BALL_RADIUS)

{

[view ball.visible = NO];
}
}

[smithdale87]

This is cluttered with syntactical errors. Really basic stuff...

your "if fabs(redhole...." is missing a set of parentheses. It should be if (fabs...&& ...)

[view ball.visible = NO];

Remove the "[" and "]"

[cobroke]

sorry I am an advanced newbie!