要显示滚动条，您需要将以下CSS样式设置为angucomplete-dropdown类，然后该指令自动将其拾取.

To show scrollbar, you need to set the following css style to angucomplete-dropdown class, and then the directive automatically picks it up.

.angucomplete-dropdown {
    overflow-y: auto;
    max-height: 200px; // your preference
}

请参见示例#1

有关更多信息: https://github.com/ghiden/angucomplete-alt