Question

我在同一个视图中有两个UIImageView。对于每个imageView，我应该分配从相机或照片库中拍摄的照片。当我开始这样做时，我为两个imageView获得了相同的照片。

- (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];
    }

和viewController.h

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

    BOOL shouldUpdateFirstImage;

}

第一个ImageView是背景。通过AlertView，我选择将Picture添加到第一个ImageView。之后我回想起相同的动作表来选择拍摄的照片。

Answer 1

TL; DR您需要跟踪班级的状态，并让您的委托方法相应地响应该州。

听起来您需要班级跟踪已显示的图像数量，并根据该信息加载新选择。我们称之为“状态”，您必须为imagePickerController委托方法实现逻辑以适当地响应该状态。

一种可能的方法是将一个BOOL作为您的类的范围（ivar或属性可以做，但ivar可能更合适），然后使用它的值来跟踪应该更新哪个imageView。

假设您已经声明了一个名为shouldUpdateFirstImage的BOOL，您可以这样做：

- (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;
    }  
}

这将替换每个连续选择更新的imageView。

Answer 2

试试这个

- (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"];

}

我如何在相同的视图中为每个UIImageView分配从相机拍摄的照片？

2 个答案: