问题 I want to update selected item style when user taps on items. nextIndex/event.index is updated but style doesn't apply. Thanks for your help. https://play.nativescript.org/?template=play-vue&id=ihH3iO export default { name: "CustomListView", props: ["page", "title", "items", "selectedIndex"], data() { return { nextIndex: this.selectedIndex ? this.selectedIndex : undefined }; }, methods: { onItemTap(event) { this.nextIndex = event.index; } } }; .selected { color: white; background-color: black