Question

在多个元素的public void handleFileUpload(FileUploadEvent event) throws IOException { uploadedFile = event.getFile(); File directory = new File(rootPath + TEMP_DIRECTORY); directory.mkdirs(); String filename = FilenameUtils.getBaseName(UUID.randomUUID().toString()); String extension = FilenameUtils.getExtension(uploadedFile.getFileName()); Path file = Files.createTempFile(directory.toPath(), filename + "-", "." + extension); Files.copy(uploadedFile.getInputstream(), file, StandardCopyOption.REPLACE_EXISTING); imageFilePath = TEMP_DIRECTORY + "/" + file.getFileName().toString(); FacesMessage message = new FacesMessage("Succesful", imageFilePath + " is uploaded."); FacesContext.getCurrentInstance().addMessage(null, message); } public void crop() throws IOException { if (image == null) { return; } String imageName = URLUtils.slugify(StringUtils.transliterateRu2En(name)); String croppedImagePath = IMAGES_ROOT_DIRECTORY + "/" + categoryId + "/" + levelId; File directory = new File(rootPath + croppedImagePath); directory.mkdirs(); String filename = FilenameUtils.getBaseName(imageName); String extension = FilenameUtils.getExtension(image.getOriginalFilename()); Path file = Files.createTempFile(directory.toPath(), filename + "-", "." + extension); InputStream is = new ByteArrayInputStream(image.getBytes()); Files.copy(is, file, StandardCopyOption.REPLACE_EXISTING); croppedImageFileName = file.getFileName().toString(); FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Success", "Cropping finished.")); }中，我想滚动条形图以查看所选项目始终位于顶部。此项目已分配ul课程。到目前为止，我已设法将栏滚动到此元素的位置，但不将其滚动到容器的顶部。

我的代码是：

selected

有什么想法吗？

Answer 1

遍历parent元素，如下所示：

jQuery(document).ready(function(){
    var x = jQuery('li.selected').parent();
    jQuery('#container').animate({
        scrollTop: jQuery(x).offset().top
    }, 2000);
});

我在类似情况下使用过这种情况：无法直接在scrollTop ...行中进行遍历，因此我使用变量选择父变量并将此变量放入scrollTop线。

使用所选项目将滚动条移至顶部

1 个答案: