ios - 在 UICollectionView 中点击时如何将图像展开为完整 View ？

Question

在我的项目中，我使用 UICollectionView 来显示图像，我也在 UICollectionViewCell 中使用 UIImageView。我想要的只是当我点击一张图片时它应该展开并全屏显示。为此，我创建了一个新 View ，上面有一个 UIImageView，并在 UICollectionViewCells 上应用了 TapGesture。展开的图像在下一个 View 中打开，但没有出现在我给它的框架中。并且当我单击它从收藏 View 中删除的任何图片时。请告诉我如何重新加载 UICollectionViewCells 请建议我如何将图像放在规定的框架上。我正在分享我的代码

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:@"cellIdentifier" forIndexPath:indexPath];

    imgview = (UIImageView *)[cell viewWithTag:100];
    imgview = [[UIImageView alloc]initWithFrame:CGRectMake(0,0,160, 160)];

    imgview.image = [UIImage imageNamed:[imagearray objectAtIndex:indexPath.row]];
    //cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[imagearray objectAtIndex:indexPath.row]]];
    [cell.contentView addSubview:imgview];

    UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(expandImage:)];
    tapped.numberOfTapsRequired = 1;
    [imgview setUserInteractionEnabled:YES];
    imgview.tag = indexPath.row;
    [imgview addGestureRecognizer:tapped];

    [cell.contentView addSubview:imgview];

    return cell;
}

-(void)expandImage:(UITapGestureRecognizer*)recogniser
{
    UIView *view1 = [[UIView alloc]initWithFrame:CGRectMake(0, 50, self.view.frame.size.width , self.view.frame.size.height)];
    view1.backgroundColor = [UIColor greenColor];
    [self.view addSubview:view1];

    UIButton *closeButton = [[UIButton alloc]initWithFrame:CGRectMake(310, 10, 50, 40)];
    [closeButton setTitle:@"Close" forState:UIControlStateNormal];
    [closeButton addTarget:self action:@selector(Closetab) forControlEvents:UIControlEventTouchUpInside];
    [view1 addSubview:closeButton];

    UIImageView *photoView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 70, self.view.frame.size.width, self.view.frame.size.height-200)];
    [photoView setBackgroundColor:[UIColor blueColor]];
    [view1 addSubview:photoView];
    photoView.accessibilityIdentifier = @"nature2.png";

    UIImageView *photoView1 = (UIImageView*)recogniser.view;
    photoView1.accessibilityIdentifier = @"nature2.png";

    //photoView.clipsToBounds = YES;

    // photoView.accessibilityIdentifier = @"apple1.png";

    photoView1.contentMode =  UIViewContentModeScaleAspectFill;

    //photoView1.clipsToBounds = YES;
    [view1 addSubview:photoView1];  
}

Answer 1

所以最好在窗口中添加 View 。所以它是全屏显示。使用以下代码。

UIView *view1 = [[UIView alloc]initWithFrame:CGRectMake(0, 50, self.view.frame.size.width , self.view.frame.size.height)];
    view1.backgroundColor = [UIColor greenColor];
    [self.view.window addSubview:view1];