Question

我正在使用iCarousal，我必须在我的iCarousal视图中使用三个webview，五个imageview和两个Labels共10个iCarousal视图。我需要做的是根据标签获取标签，webviews和imageview在下面的方法中，当iCarousel移动时改变它们的值。

- (void)carouselCurrentItemIndexDidChange:(iCarousel *)objcarousel

我通过objcarousel.currentItemIndex获取iCarousel的当前索引，但是当我使用标记获取视图时，我无法获取当前视图。它提供了第二个下一个视图。

代码：

- (NSUInteger)numberOfItemsInCarousel:(iCarousel *)carousel
{
    return MainIndexArray.count;
}

- (void)carouselCurrentItemIndexDidChange:(iCarousel *)carousel1
{

    if(carousel1.currentItemIndex<3)
    {

    }
    else
    {
        UIWebView *WEB=(UIWebView *) [carousel1 viewWithTag:2];
        NSLog(@"WEB====%@",WEB);

        [WEB stopLoading];

        static NSString *youTubeVideoHTML = @"<!DOCTYPE html><html><head><style>body{margin:0px 0px 0px 0px;}</style></head> <body> <div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = \"http://www.youtube.com/player_api\"; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); var player; function onYouTubePlayerAPIReady() { player = new YT.Player('player', { width:'%0.0f', height:'%0.0f', videoId:'%@', events: { 'onReady': onPlayerReady, } }); } function onPlayerReady(event) { event.target.playVideo(); } </script> </body> </html>";

        NSLog(@"currentItemIndex=====%d",carousel1.currentItemIndex);

        NSString *html = [NSString stringWithFormat:youTubeVideoHTML, WEB.frame.size.width, WEB.frame.size.height,[YouTubeUrlArray objectAtIndex:0]];

        [WEB loadHTMLString:html baseURL:[[NSBundle mainBundle] resourceURL]];

    } 
}


- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{
    UILabel *label = nil;
    UIWebView *web=nil;

    //create new view if no view is available for recycling
    if (view == nil)
    {
        view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 280, 200.0f)];
        ((UIImageView *)view).image = [UIImage imageNamed:@"page.png"];
        view.contentMode = UIViewContentModeCenter;

        if(index<3)
        {
            label = [[UILabel alloc] initWithFrame:view.bounds];
            label.backgroundColor = [UIColor grayColor];
            label.textAlignment = NSTextAlignmentCenter;
            label.font = [label.font fontWithSize:50];
            label.tag = 1;
            [view addSubview:label];

        }
        else
        {
            web=[[UIWebView alloc]initWithFrame:view.bounds];
            web.tag=2;
            [view addSubview:web];
        }
    }
    else
    {
        //get a reference to the label in the recycled view

        if(index<3)
        {
            label = (UILabel *)[view viewWithTag:1];
        }
        else
        {
            web=(UIWebView*) [view viewWithTag:2];
        }
    }


    if(index<3)
    {
        label.text = [MainIndexArray objectAtIndex:index];
    }
    else
    {
        [web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.google.com"]]];
    }

    return view;
}

所以请建议我在iCarousel滚动时如何获取当前标签或当前的webview或当前的imageview。

Answer 1

您应该使用itemViewAtIndex:和currentItemIndex来获取单个项目视图。然后，在该视图上使用viewWithTag:。

问题是viewWithTag:搜索所有子视图并返回第一个匹配项。如果您在轮播本身上运行它，那么您无法保证首先找到哪个视图并返回。

UIWebView *WEB = (UIWebView *)[[carousel1 itemViewAtIndex:carousel1.currentItemIndex] viewWithTag:2];

如何让iCarousel当前可见的视图？

1 个答案: