如何为同一视图中的每个UIImageView分配从相机拍摄的照片？

Question

I have two UIImageView in the same view.for each imageView I should assign a picture taken from the camera or photos library. When I start by doing that, I get the same photo for the two imageView.

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    [picker dismissViewControllerAnimated:YES completion:nil];
    imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    imageView2.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

} 


-(IBAction)addPhoto:(id)sender{

    UIActionSheet *actionSheet =[[UIActionSheet alloc]initWithTitle:@"" delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:@"Choose Photo" otherButtonTitles:@"Take Photo ", nil];


    [actionSheet showInView:self.view];

}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    shouldUpdateFirstImage =YES;
    // chosenImage = info[UIImagePickerControllerEditedImage];
    [picker dismissViewControllerAnimated:YES completion:nil];

  if (shouldUpdateFirstImage) {
        imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
        shouldUpdateFirstImage = NO;
    }
    else {
        pictureView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

        shouldUpdateFirstImage = YES;
    }

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
    if([title isEqualToString:@"Put Picture"])
    {
        alrtView.hidden = YES;
        pictureView = [[UIImageView alloc]initWithFrame:CGRectMake(0,0,100,100)];
       [self.view addSubview:pictureView];
        [self addPhoto:self];
    }

And the viewController.h

@interface ViewController : UIViewController<UIImagePickerControllerDelegate, UINavigationControllerDelegate,UIActionSheetDelegate,UITextViewDelegate>
{

    BOOL shouldUpdateFirstImage;

}

The first ImageView is the background.Through an AlertView I choose to add Picture to the first ImageView.After that I recall the same actionsheet to choose the taken photo.

Answer 1

TL;DR you need to track the state of your class, and have your delegate method respond accordingly to that state.

It sounds like you need your class to keep track of how many images have been displayed, and load new selections based on that information. We call this "state", and you have to implement the logic for your imagePickerController delegate method to respond appropriately to that state.

One possible approach would be to have a BOOL scoped to your class (either an ivar or property will do, but ivar is likely more appropriate), then use it's value to keep track of which imageView should be updated.

Assuming you already declared a BOOL named shouldUpdateFirstImage, you could do something like this:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

[picker dismissViewControllerAnimated:YES completion:nil];

if (shouldUpdateFirstImage) {
        imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
        shouldUpdateFirstImage = NO;
    }
else {
    imageView2.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    shouldUpdateFirstImage = YES;
    }  
}

This would alternate which imageView was updated with each successive selection.

Answer 2

Try this

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{
      [picker dismissViewControllerAnimated:YES completion:nil];

 if(imageView.image)
    imageView2.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
 else
    imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

}