Dynamically assign random images as button background separately

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 for setting dynamic buttons in the setButtons_AsPerTheMatrixSelection method,

" AddImageToArray " is used to add images from a package to NSMutableArray (arr_FirstSet) one by one.

" changeImage " is used to set the background of a particular button.

I can set the images as the background for the buttons in random order,

But the main problem is that I have to set a fixed dynamic image to a specific button.

right now, on every click of a certain button, I get a modified random image when I click it once, twice, three times, etc.

I need to set some specific image that is randomly generated in "changeImage" on one button and the rest on the remaining buttons of a single single.

Then I have to check if the two buttons have the same background, after which these two buttons will be removed from the matrix.

I ask you, please, for the mistake I am making and helping 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; } } } } }