cant touch button while it is moving - ipad

Question

I have written the code shown below. my problem is that I can't touch some of the buttons. I have written that method in NSTimer method. Can anybody help in solving this problem?
One method is to create a button and another for changing the values to screen size.
-(void)createButton
{
int x=0;
int y=0;
int width=100;
int height=100;
for (int i=0; i<9; i++)
{
UIButton *button=[[UIButton alloc] initWithFrame:CGRectMake(x ,y, width, height)];
[button.titleLabel setFont:[UIFont fontWithName:#"Helvetica" size:24.0]];
NSDate *date=[NSDate date];
NSDateFormatter *dateformatter=[[NSDateFormatter alloc]init];
[dateformatter setDateFormat:#"ss"];
NSString *sec=[dateformatter stringFromDate:date];
NSLog(#"sec is %#",sec);
CGPoint dest= CGPointMake(arc4random() %768, arc4random() %1024);
//CGPoint dest= CGPointMake(arc4random() %[sec intValue], arc4random() %480);
button.tag=i;
[button setBackgroundColor:[UIColor blackColor]];
[button setTitleColor:[UIColor orangeColor] forState:UIControlStateNormal];
[button setTitle:[NSString stringWithFormat:#"%d",i] forState:UIControlStateNormal];
//[button setImage:[UIImage imageNamed:#"thing.png"] forState:UIControlStateNormal];
int numx=[[NSNumber numberWithInt:dest.x]intValue];
int numy=[[NSNumber numberWithInt:dest.y]intValue];
//button.center.x= numx+5;
//button.center.y=numy+5;
button.center=CGPointMake(numx+10, numy+10);
NSMutableDictionary *dict=[[NSMutableDictionary alloc]init];
[dict setValue:[NSNumber numberWithInt:5] forKey:#"Xvalue"];
[dict setValue:[NSNumber numberWithInt:5] forKey:#"Yvalue"];
[dict setValue:button forKey:#"Button"];
[button addTarget:self action:#selector(buttonpressed:) forControlEvents:UIControlEventTouchUpInside];
//[button addTarget:self action:#selector(dragBegan:withEvent:)forControlEvents: UIControlEventTouchDown];
//[button addTarget:#selector(buttonpressed:) action:#selector(buttonpressed:) forControlEvents:UIControlStateSelected];
[button addTarget:self action:#selector(dragMoving:withEvent:)forControlEvents: UIControlEventTouchDragInside];
[button addTarget:self action:#selector(dragEnded:withEvent:)forControlEvents: UIControlEventTouchUpInside |
UIControlEventTouchUpOutside];
[self.buttonArray addObject:dict];
[self.view addSubview:button];
[button release];
x+=50;
}
}
-(void)timerMethod
{
for(NSMutableDictionary *dict in self.buttonArray)
{
UIButton *but=[dict objectForKey:#"Button"];
CGPoint bcenter=but.center;
int numx=[[dict objectForKey:#"Xvalue"]intValue];
int numy=[[dict objectForKey:#"Yvalue"]intValue];
bcenter.x+=numx;
bcenter.y+=numy;
//bcenter.x=bcenter.x+[dict objectForKey:#"Xvalue"];
//bcenter.y=bcenter.y+[dict objectForKey:#"Yvalue"];
but.center=bcenter;
if(bcenter.x>720)
{
[dict setValue:[NSNumber numberWithInt:-10] forKey:#"Xvalue"];
}
if(bcenter.y>1000)
{
[dict setValue:[NSNumber numberWithInt:-10] forKey:#"Yvalue"];
}
if(bcenter.x<15)
{
[dict setValue:[NSNumber numberWithInt:10] forKey:#"Xvalue"];
}
if(bcenter.y<15)
{
[dict setValue:[NSNumber numberWithInt:10] forKey:#"Yvalue"];
}
}
}
-(void)buttonpressed:(id)sender
{
NSLog(#"sender tag is %d",[sender tag]);
}

Answer 1

try set target:self action:buttonpressed
I think you forget to do that , the function will be fired when you click it
[button addTarget:self action:#selector(buttonpressed:) forControlEvents:UIControlEventTouchUpInside];