how to change uiimageview image's programmatically

Question

In my ios application i create uiimageviews programmatically like that,

for (int i=0; i<20; i++) {

                                   productID=[products objectAtIndex:i];

                                   UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
                                   [button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)];
                                   //[button setImage:redButtonImage forState:UIControlStateNormal];
                                   [button addTarget:self
                                              action:@selector(buttonAction:)
                                    forControlEvents:UIControlEventTouchUpInside];
                                   button.tag = productID;
                                   [scrollView addSubview:button];



                                   UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)];
                                   imageView.tag=productID;
                                   UIImage *image = [UIImage imageNamed:@"redImage.png"];
                                   [imageView setImage:image];
                                   [scrollView addSubview:imageView];


                               }

in my buttonActon, i want to change that uiimageview's image to another image. But i can not do that. Can anyone help me? Thank You.

You can not do this because? What have you tried?

Pfitz
– Pfitz

2013-04-26 13:18:53 +00:00
Commented Apr 26, 2013 at 13:18 — Pfitz
– Pfitz, Commented Apr 26, 2013 at 13:18

Balu · Accepted Answer · 2013-04-26 13:25:48Z

12

try like this ,

for (int i=0; i<20; i++) {

                                   productID=[products objectAtIndex:i];

                                   UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
                                   [button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)];
                                   //[button setImage:redButtonImage forState:UIControlStateNormal];
                                   [button addTarget:self
                                              action:@selector(buttonAction:)
                                    forControlEvents:UIControlEventTouchUpInside];
                                   button.tag = 100+productID;
                                   [scrollView addSubview:button];



                                   UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)];
                                   imageView.tag=productID;
                                   UIImage *image = [UIImage imageNamed:@"redImage.png"];
                                   [imageView setImage:image];
                                   [scrollView addSubview:imageView];


                               }

keep this one in button action method and pass the imageview tag in the place of imgview.tag

     UIImageView *img=(UIImageView *)[scrollView viewWithTag:imgview.tag];
    img.image=[UIImage imageNamed:@"name.png"];

edited Apr 26, 2013 at 13:25

answered Apr 26, 2013 at 13:19

Balu

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4 Comments

bdkhsn Over a year ago

i did same code but i got this error :-[UIRoundedRectButton setImage:]: unrecognized selector sent to instance 0x8993130

Balu Over a year ago

ok problem is that with tag value both the button and image having same tag value.

Balu Over a year ago

in the place self.view replace scrollView.

Balu Over a year ago

give different tag values for both images and buttons then it'l work.

Midhun MP · Accepted Answer · 2013-04-26 13:23:12Z

3

Instead of this:

imageView.tag=UrunId;

Write:

imageView.tag = productID + 100;

Because you need a unique tag for each Image View.

Then implement the buttonAction: like:

- (void)buttonAction:(UIButton *)sender
{
  UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:(sender.tag+100)];
  [imageView setImage:yourImage];
}

answered Apr 26, 2013 at 13:23

Midhun MP

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1 Comment

bdkhsn Over a year ago

because @Sunny gives the answer a few seconds ago before you. thanks again.

Dharmbir Singh · Accepted Answer · 2013-04-26 13:47:01Z

2

Please try to use this one

You should have different tag for button and image.So please give first different tag like this....

UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)];
                                   imageView.tag=button.tag+1;
                                   UIImage *image = [UIImage imageNamed:@"redImage.png"];
                                   [imageView setImage:image];
                                   [scrollView addSubview:imageView];

After that do this...

- (void)buttonAction:(UIButton *)sender
{
  UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:sender.tag+1];
  imageView.image=[UIImage imageNamed:@"imageName"];

}

edited Apr 26, 2013 at 13:47

answered Apr 26, 2013 at 13:26

Dharmbir Singh

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