change and show background image in ios - objective-c

Question

I am writing an app, where I programmatically display a background image and then update some text over the top.
On some event (e.g. a tap), I want to change the text and background image.
I am able to change the text successfully, but the image, is not changing.
I setup the image with the following code, where view, images1 and images2 are:
UIImageView* view;
UIImage* images1;
UIImage* images2;
view = [[UIImageView alloc] initWithImage: image1];
view.frame = CGRectMake(0, 0, screenWidth, screenHeight);
[view setUserInteractionEnabled:YES];
[self.view addSubview:view];
[self.view setContentMode:UIViewContentModeScaleToFill];
[self.view sendSubviewToBack:view];
and then I try to change the background with:
view.image = image2;
but the image does not change, any ideas?

Answer 1

Try this code to change the image on tap gesture
First you have to define UIImageView in header file like this.
#interface ChangeImageViewController ()
UIImageView *Imgview;
#end
#implementation ChangeImageViewController
Imgview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, screenWidth, screenHeight)];
Imgview.image=[UIImage imageNamed:#"firstImageName.png"];
[Imgview setUserInteractionEnabled:YES];
[self.view addSubview:Imgview];
[self.view sendSubviewToBack:Imgview];
UITapGestureRecognizer *tapGesture=[[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(TaponImgview:)];
tapGesture.numberOfTapsRequired=1;
[Imgview addGestureRecognizer:tapGesture];
And In Tap Gesture Recognizer Method.
-(void)TaponImgview:(UITapGestureRecognizer *)recognizer
{
Imgview.image=[UIImage imageNamed:#"secondImage.png"]; // Your second image that you want to change it
}
And So finally your image will change on tap on UIImageview..Thanks