Harmony笔记
Navigation界面跳转
@Entry
@Component
struct Index {
pageStack: NavPathStack = new NavPathStack();
build() {
Navigation(this.pageStack) {
Text("Hello")
.onClick(() => {
this.pageStack.pushPath({ name: "page2" })
})
}
.mode(NavigationMode.Stack)
.navDestination(PagesMap)
.hideToolBar(true)
.hideBackButton(true)
.hideTitleBar(true)
.hideNavBar(false)
}
}
@Builder
function PagesMap(name: string, param: object): void {
if (name == "page2") {
Page2Builder()
}
}
//Page2
@Builder
export function Page2Builder() {
Page2()
}
@Entry
struct Page2 {
build() {
NavDestination() {
Text("page2")
.onClick(() => {
this.getUIContext().getRouter().pushUrl({ url: "pages/Page3" })
})
}
.width('100%')
.height('100%')
.hideTitleBar(true)
.hideToolBar(true)
.hideBackButton(true)
}
}
PagesMap需要添加 @Builder注解,否则跳转不报错,但显示的是空白界面。
Router
-
Router的跳转目的地必须是Page,而NavDestination是Navigation的子组件。Page使用@Entry、@Component进行注解,并在resources\base\profile\main_page.json 中进行注册
@Entry @Component struct Page4 { build() { Text("page4") .id('Page3HelloWorld') .fontSize($r('app.float.page_text_font_size')) .fontWeight(FontWeight.Bold) .backgroundColor("red") .height('100%') .width('100%') } } //main_page.json { "src": [ "pages/Index", "pages/Page3", "pages/Page4" ] } -
Router传递参数时,如果直接传递数字,字符串,枚举值,如this.getUIContext().getRouter().pushUrl({ url: "pages/account/LoginPage", params: "2" });获取会得到undefined。
RdbStore
- Parameter error.ValuesBucket is invalid.
let value = new Array<relationalStore.ValuesBucket>();
await db.batchInsert("news", value);
如果value没有数据,执行时会报异常{"code":"401"}。