Dynamic assignment of random images as button's background separately - iphone

Question

-(void)setButtons_AsPerTheMatrixSelection
{
for(UIView *subview in [viewWithButtons subviews])
{
if ([subview isKindOfClass:[UIButton class]])
{
[subview removeFromSuperview];
}
}
viewWithButtons = [[UIView alloc] init];
width = 48;
height = 48;
pw = 49;
ph = 49;
arrButton = [[NSMutableArray alloc] init];
UIImage *imgDefaultBG = [UIImage imageNamed:#"bg.jpg"];
viewWithButtons.frame = CGRectMake(50, 40, 200, 260);
ch = 4;
cv = 4;
for ( i = 0 ; i < cv ; ++i )
{
for ( j = 0 ; j < ch ; ++j )
{
btnMatrix = [[[UIButton alloc] initWithFrame:CGRectMake(10+pw*j, 51+ph*i, width, height)] autorelease];
btnMatrix.tag = i*ch+j;
btnMatrix.userInteractionEnabled = TRUE;
bulImageStatus = FALSE;
[btnMatrix addTarget:self action:#selector(changeImage:) forControlEvents:UIControlEventTouchDown];
[btnMatrix setBackgroundImage:imgDefaultBG forState:UIControlStateNormal];
[viewWithButtons addSubview:btnMatrix];
[arrButton addObject:btnMatrix];
}
}
NSLog(#"arrButton object count is:--> %d",[arrButton count]);
[self.view addSubview:viewWithButtons];
}
-(void)AddImageToArray
{
arr_FirstSet = [[NSMutableArray alloc] init];
NSString *strImageName;
if(appDelegate.intCategoryBtnTag == 0)
{
for (intimg = 1; intimg <= 28; intimg++)
{
strImageName = [NSString stringWithFormat:#"%d_1.png",intimg];
NSLog(#"strImageName is :--> %#",strImageName);
[arr_FirstSet addObject:strImageName];
}
NSLog(#"arr_FirstSet objects are...%#",arr_FirstSet);
}
}
-(void)changeImage:(id)sender
{
UIImage *img;
NSString *strImageName;
strImageName = [arr_FirstSet objectAtIndex:arc4random() % [arr_FirstSet count]/2];
NSLog(#"btnMatrix is:--> %#",strImageName);
img = [UIImage imageNamed:strImageName];
//[btnMatrix setImage:img forState:UIControlEventTouchDown];
NSLog(#"sender detail is:--> %#",sender);
[sender setBackgroundImage:img forState:UIControlStateHighlighted];
}
This is my code to set the dynamic buttons in "setButtons_AsPerTheMatrixSelection" method,
"AddImageToArray" method is used to add images from bundle to NSMutableArray (arr_FirstSet) one by one.
"changeImage" method is used to set the background of particular button.
I am able to set the images as background to the buttons randomly,
But the main problem is that i have to set fixed dynamic image to particular button.
right now on each click of particular button i am getting changed random image when i press it once, twice, thrice etc...
I have to set any particular image which is generated randomly in the "changeImage" to single button & rest to the other buttons single-single.
Then i have to check if two buttons have same background then these two buttons will be removed from the matrix.
Please guide me for the mistake i am doing & help me.

Answer 1

//Please replace this method
-(void)changeImage:(UIButton *)sender
{
UIImage *img;
NSString *strImageName;
strImageName = [arr_FirstSet objectAtIndex:arc4random() % [arr_FirstSet count]/2];
img = [UIImage imageNamed:strImageName];
//for the first time sender.imageView.image property will be null then only we set image to the button.
//For second click this condition fails and does not set the other image.
if(!sender.imageView.image)
{
[sender setImage:img forState:UIControlStateHighlighted];
[sender setImage:img forState:UIControlStateSelected];
}
// Calling a method to check if two images of buttons are same.
[self checkIfTwoImagesAreSame:sender];
}
//And Add this method
- (void)checkIfTwoImagesAreSameImageMaching:(UIButton *)sender
{
for(UIView *subview in [viewWithButtons subviews])
{
if ([subview isKindOfClass:[UIButton class]])
{
UIButton *btn = (UIButton *)subview;
// This condition is comparing clicked button image with all the buttons images of the viewWithButtons view if it isEqual:
if(sender.imageView.image && btn.imageView.image && [sender.imageView.image isEqual:btn.imageView.image])
{
// this is checking if the clicked button is not comparing with itself
if(btn.tag != sender.tag)
{
[btn removeFromSuperview];
[sender removeFromSuperview];
// OR
// btn.selected = YES;
// sender.selected = YES;
// OR
// btn.hidden = YES;
// sender.hidden = YES;
}
}
}
}
}