iphone - 获取图像索引

Question

我正在开发一个应用程序，因为我有 15 张图像作为正面图像存储在数组中，另外 15 张图像作为背面图像。我想将该图像垂直添加到 scrollview 我已经成功完成了，但现在我的问题是如何比较这两个数组图像。

在垂直 ScrollView 上添加正面图像已成功添加但未随机打乱，即当我双击正面图像时，会显示背面阵列图像，但该 ImageView 中仍存在正面图像。

请帮我解决这个问题。

提前致谢。

请检查我的代码:

- (void)viewDidLoad
{
    [super viewDidLoad];


    AppDelegate * delegate=(AppDelegate *)[[UIApplication sharedApplication]delegate];

    delegate.front=TRUE;
    delegate.back=FALSE;


    UIScrollView *scrollView=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];

    [scrollView setPagingEnabled:YES];

    [scrollView setShowsHorizontalScrollIndicator:NO];

    FrontsCards=[[NSMutableArray alloc]initWithObjects:@"cloub1.png",@"cloub2.png",@"cloub3.png",@"cloub4.png",@"cloub5.png",@"cloub6.png",@"cloub7.png",@"cloub8.png",@"cloub9.png",@"cloub10.png",@"cloub11.png",@"cloub12.png",@"diamond1.png",@"diamond2.png",@"diamond3.png",@"diamond4.png",@"diamond5.png", nil];

    for(int m=0; m<[FrontsCards count];m++)
      {
        ImgView.tag=m;

        int randIdx=arc4random()%[FrontsCards count];


        NSString *imageName=[FrontsCards objectAtIndex:randIdx];

    //  NSLog(@"%d",randIdx);


        NSString *fullImageName=[NSString stringWithFormat:@"%@",imageName];

        int padding=25;
        // padding is given.

        CGRect imageViewFrame=CGRectMake(scrollView.frame.size.width*m+padding, scrollView.frame.origin.y, scrollView.frame.size.width-2*padding, scrollView.frame.size.height);

        ImgView=[[UIImageView alloc]initWithFrame:imageViewFrame];

        [ImgView setImage:[UIImage imageNamed:fullImageName]];

        [ImgView setContentMode:UIViewContentModeScaleAspectFill];


        [scrollView addSubview:ImgView];


        UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTapImgView:)];
        doubleTap.numberOfTapsRequired = 2;
        doubleTap.delegate = self;

        [self.ImgView addGestureRecognizer:doubleTap];

        self.ImgView.userInteractionEnabled=YES;


    }

    CGSize scrollViewSize=CGSizeMake(scrollView.frame.size.width*[FrontsCards count], scrollView.frame.size.height);
    [scrollView setContentSize:scrollViewSize];
    [self.view addSubview:scrollView];




}


- (void)doubleTapImgView:(UITapGestureRecognizer *)gesture
{


    AppDelegate * delegate=(AppDelegate *)[[UIApplication sharedApplication]delegate];

    delegate.back=TRUE;

    delegate.front=FALSE;


    NSLog(@"%d", gesture.view.tag);

        NSLog(@"double-tap");

    BackCards =[[NSMutableArray alloc]initWithObjects:@"card1.jpg",@"card2.jpg",@"card3.jpg",@"card4.jpg", nil];

    UIScrollView *scrollView=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];

    [scrollView setPagingEnabled:YES];

    [scrollView setShowsHorizontalScrollIndicator:NO];

    for(int m=0; m< [BackCards count];m++)
    {       
        NSString *imageName=[BackCards objectAtIndex:m];

        NSString *fullImageName=[NSString stringWithFormat:@"%@",imageName];

        int padding=25;
        // padding is given.

        CGRect imageViewFrame=CGRectMake(scrollView.frame.size.width*m+padding, scrollView.frame.origin.y, scrollView.frame.size.width-2*padding, scrollView.frame.size.height);

        ImgView=[[UIImageView alloc]initWithFrame:imageViewFrame];

        [ImgView setImage:[UIImage imageNamed:fullImageName]];

        [ImgView setContentMode:UIViewContentModeScaleAspectFill];


        [scrollView addSubview:ImgView];


        UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTapImgView:)];
        doubleTap.numberOfTapsRequired = 2;
        doubleTap.delegate = self;

        [self.ImgView addGestureRecognizer:doubleTap];

        self.ImgView.userInteractionEnabled=YES;


    }

    CGSize scrollViewSize=CGSizeMake(scrollView.frame.size.width*[FrontsCards count], scrollView.frame.size.height);
    [scrollView setContentSize:scrollViewSize];
    [self.view addSubview:scrollView];

}

Answer 1

要实现这一点，您可以设置 Tag当您点击该特定图像时，每张图像的值都会获得标签值并使用该 tag值(value)。

self.imagview.tag=Unique_tagValue;

当单击该图像时，您可以从另一个数组设置图像。

self.imageview.image=[UIImage imageNamed:[backArray objectAtIndex:self.imageview.tag]];

编辑:-

在viewDidLoad像这样为 imageview 设置标签的方法，ImgView.tag=m+100;

保留以下代码在doubleTapImgView方法

 for(int m=0; m< [BackCards count];m++)
    { 
      UIImageView *imgview=(UIImageView *)[scrollview viewWithTag:m+100];
      imgview.image=[UIImage imagNamed:[BackCards objectAtIndex:m]];
    }

subview 翻译:-

 [self.view bringSubviewToFront:frontview];