Question

I am adding a custom view on main window then on the view i am creating a button and button is showing but the action is not performing on button tapped.
on a button tap i want to open a photogallery.
and in a loop the buttons are created.

code that i am using is there…

UIImage *image=[[UIImage alloc] initWithData:data cache:NO];
UIImageView *iv=[[UIImageView alloc] initWithFrame:CGRectMake(200, y, 75, 75)];

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(200, y, 75, 75)];
[button setAlpha:0];
[button setTag:i];//change this to your loop counter
[button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];  

iv.image=image;
//  iv.tag=@"bigimage.jpg";
iv.userInteractionEnabled=YES;
button.userInteractionEnabled = YES;

[iv addSubview:button];
[button release];

y=y+145;
[view1 addSubview:iv];
[iv release];

And also try this code but no improvements are there…..

UIButton *button=[UIButton buttonWithType:UIButtonTypeCustom];
        button.frame=CGRectMake(200, y, 75, 75);
        UIImage *img = [[UIImage alloc] initWithData:data];
        [button setBackgroundImage:img forState:UIControlStateNormal];
        [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
        button.tag = i;
        y = y+145;
        [view1 addSubview:button];

Answer 1

Hello Shivangi,

         I think you want to set image on button so try this code its will help you



          //function to create button dynamically on scrollview
          -(void)createButton
           {
            int Y = 20;
            indexRow = 0;
            for (int i = 0; i < [prow.noOfPhotos count]; i++) 
            {
              thumbNailButton = [UIButton buttonWithType:UIButtonTypeCustom];       
              int X = 4 + (78 * (i % 4));
              NSLog(@"X = %d",X);

              NSLog(@"Start Y = %d",Y);
              if (i % 4 == 0) 
              {
            NSLog(@"%d",i);
            Y = (70 * verticalImageRowCount);
            NSLog(@"Y = %d",Y);
            verticalImageRowCount++;
            NSLog(@"VerticalImageRowCount= %d");
              } 

              CGRect rect = myScrollView.frame;
               rect.size.width = 100;
               rect.size.height = Y + 77; 
               myScrollView.contentSize = CGSizeMake(rect.size.width,rect.size.height);
               thumbNailButton.frame = CGRectMake(X,Y, 62,65);

               view = [[UIImageView alloc] init];

               prow.photo = [prow.noOfPhotos objectAtIndex:indexRow];

               imagePath = prow.photo;
               asyncImageView = [[[AsyncImageView alloc] initWithFrame:CGRectMake(4, 0, 62, 65)] autorelease];
               asyncImageView.backgroundColor = [UIColor clearColor];
               [view addSubview:asyncImageView];

               NSURL *url = [NSURL URLWithString:imagePath];
               [asyncImageView loadImageFromURL:url];           
               [view setImage:[UIImage imageNamed:[prow.noOfPhotos objectAtIndex:i]]];

               thumbNailButton.tag = i;
               thumbNailButton.backgroundColor=[UIColor clearColor];
                   [thumbNailButton addTarget:self action:@selector(imageClicked:) forControlEvents:UIControlEventTouchUpInside];   
               [thumbNailButton addSubview:view];
               [myScrollView addSubview:thumbNailButton];
               indexRow+= 1;

                }
                }