ios - 如何将标签设置为 UIImageview 图像等于 iOS 中每个图像的数组索引？

Question

我是 iOS 开发新手。我想设置一个 imageview 图像的标签等于它在我的 Array 索引中的值，就像我的 Array Contain 50 图像链接一样，我将 imageview 设置为图像代码，如

for(int index=0; index < [self.imagesa count]; index++)
{
    NSDictionary *dict=[self.imagesa objectAtIndex:index];
    NSString *image=[dict valueForKey:@"link"];
    smallImage = [[UIImageView alloc] init];
    pageLabel=[[UILabel alloc]init];
    smallImage.tag=index;
    smallImage.bounds = CGRectMake(10, 10, self.scrollView.frame.size.width, self.scrollView.frame.size.width);
    smallImage.frame = CGRectMake(5+xOffset, 0, 50, 50);
    [smallImage sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:@"1.png"]];
    [self.imageArray insertObject:smallImage atIndex:index];
    CGSize scrollViewSize=CGSizeMake(self.scrollView.frame.size.width*[self.imageArray count], self.scrollView.frame.size.height);
    [self.scrollView setContentSize:scrollViewSize];
    CALayer *borderLayer = [CALayer layer];
    CGRect borderFrame = CGRectMake(10, 10, (smallImage.frame.size.width), (smallImage.frame.size.height));
    [borderLayer setBackgroundColor:[[UIColor clearColor] CGColor]];
    [borderLayer setFrame:borderFrame];
    [borderLayer setCornerRadius:kCornerRadius];
    [borderLayer setBorderWidth:kBoarderWidth];
    [borderLayer setBorderColor:[[UIColor redColor] CGColor]];
    [smallImage.layer addSublayer:borderLayer];
    [self.scrollView addSubview:smallImage];
    [self.scrollView addSubview:pageLabel];
    [self.scrollView addSubview:[self.imageArray objectAtIndex:index]];
    xOffset += 60;
}

在这里我想好像我选择了第 5 个图像然后它的标签也是五个怎么可能？在这里我设置了 imageview.tag=index 但它总是 Returen 作为我的数组计数值。请给我解决方案，因为每个图像标签都等于它在数组中的索引。

提前谢谢

Answer 1

我已经改进了你的代码并添加了一个 UIButton 作为点击区域:

self.imageArray = [[NSMutableArray alloc] init];

for(int index=0; index < [self.imagesa count]; index++){
    NSDictionary *dict=[self.imagesa objectAtIndex:index];
    NSString *imageString = [dict valueForKey:@"link"];

    UIImageView *smallImage = [[UIImageView alloc] init];
    smallImage.bounds = CGRectMake(10, 10, self.scrollView.frame.size.width, self.scrollView.frame.size.width);
    smallImage.frame = CGRectMake(5+(index*60), 0, 50, 50);
    [smallImage sd_setImageWithURL:[NSURL URLWithString:imageString] placeholderImage:[UIImage imageNamed:@"1.png"]];
    smallImage.layer.backgroundColor = [[UIColor clearColor] CGColor];
    smallImage.layer.cornerRadius = kCornerRadius;
    smallImage.layer.borderWidth = kBoarderWidth;
    smallImage.layer.borderColor = [[UIColor redColor] CGColor];
    [self.imageArray addObject:smallImage];
    [self.scrollView addSubview:smallImage];

    UIButton *clickArea = [UIButton buttonWithType:UIButtonTypeCustom];
    clickArea.frame = smallImage.frame;
    clickArea.tag = index;
    [clickArea addTarget:self action:@selector(clickAreaClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.scrollView addSubview:clickArea];
}

// Doesn't need to be in for-loop
CGSize scrollViewSize=CGSizeMake(self.scrollView.frame.size.width*[self.imageArray count], self.scrollView.frame.size.height);
[self.scrollView setContentSize:scrollViewSize];

要从 UIButton 中获取标签，请单击:

- (void)clickAreaClicked:(UIButton*)sender
{
    NSLog(@"sender tag: %i", sender.tag );
}

我刚刚测试过它并且有效。让我知道它是否适合您。