有没有办法在NativeScript中以编程方式禁用/启用ScrollView滚动？
嗨有人!
我正在尝试在我的Nativescript应用程序中为ActionBar添加一个汉堡菜单图标,这将触发一个侧抽屉,但我无法添加该菜单图标.
.xml到目前为止这是我的代码:
<dpg:DrawerPage loaded="pageLoaded" navigatedTo="onNavigatingTo"
xmlns:dpg="nativescript-telerik-ui/sidedrawer/drawerpage"
xmlns:drawer="nativescript-telerik-ui/sidedrawer"
xmlns:sdc="views/side-drawer-content"
xmlns="http://www.nativescript.org/tns.xsd">
<navigation.actionBar>
<ActionBar title="Drawer Over Navigation">
<android>
<NavigationButton icon="res://ic_menu" tap="toggleDrawer" />
</android>
<ios>
<ActionItem icon="res://ic_menu" ios.position="left" tap="toggleDrawer" />
</ios>
</ActionBar>
</navigation.actionBar>
<dpg:DrawerPage.sideDrawer>
<drawer:RadSideDrawer id="drawer">
<drawer:RadSideDrawer.drawerContent>
<sdc:side-drawer-content />
</drawer:RadSideDrawer.drawerContent>
</drawer:RadSideDrawer>
</dpg:DrawerPage.sideDrawer>
<StackLayout cssClass="mainContent">
<Label text="{{ exampleText }}" textWrap="true" cssClass="drawerContentText"/>
<Button text="Toggle Drawer" tap="toggleDrawer" icon="res://ic_menu" />
</StackLayout>
</dpg:DrawerPage>
我认为相关部分在这里,但我看不出可能是我的错误.
<ActionBar title="Drawer Over Navigation">
<android>
<NavigationButton icon="res://ic_menu" tap="toggleDrawer" />
</android>
<ioThanks in advance!s>
<ActionItem icon="res://ic_menu" ios.position="left" tap="toggleDrawer" /> …是否可以让孩子加入自定义组件？
<myCustomComponent>
<Label #id1 text="ID 1"></Label>
<Label #id2 text="ID 2"></Label>
</myCustomComponent>
有没有办法获取这两个的引用，Lable以将它们放置GridLayout在我的自定义组件中？
即时通讯制作移动应用.在我的登录表单中,我有2个TextFields
<TextField hint="Email Address" keyboardType="email" [(ngModel)]="email" autocorrect="false" autocapitalizationType="none"></TextField>
<TextField hint="Password" secure="true" [(ngModel)]="password"></TextField>
<Label [text]="email"></Label>在component.ts中
import { Component, OnInit } from '@angular/core';
import { Router } from "@angular/router";
import { NativeScriptRouterModule } from "nativescript-angular/router";
import { Page } from "ui/page";
import * as Toast from 'nativescript-toast';
@Component({
moduleId: module.id,
selector: 'sign-in',
templateUrl: "template.html"
})
export class SignInPage implements OnInit {
email: string ="example";
password: string;
constructor(private router: Router, page: Page) {
page.actionBarHidden = true;
}
ngOnInit() {
var loginParams = …typescript nativescript angular2-forms angular2-nativescript angular
我将本机脚本从2.5.2更新到了3.0.3。突然，当我尝试运行该应用程序时，出现以下错误：
node_modules / tns-core-modules / tns-core-modules.d.ts（17,27）：错误TS2304：找不到名称“ Headers”。
node_modules / tns-core-modules / tns-core-modules.d.ts（19,44）：错误TS2304：找不到名称“ RequestInit”。
node_modules / tns-core-modules / tns-core-modules.d.ts（19,66）：错误TS2304：找不到名称“ Response”。
我不明白为什么，因为我认为我没有在项目中使用此模块。
谢谢！:)
我想用角度应用程序在我的nativescript中实现轮询.我想每秒检查一下后端服务器的状态.我有这项服务:
@Injectable()
export class StateService {
getStatus(): Observable<StateApp> {
let headers = this.getHeaders();
return this.http
.get(BackendService.stateUrl, {
headers: headers
})
.map(res => {
return res.json() as StateApp
})
.catch(this.handleErrors);
}
然后我想挂起这个服务并向服务器发送请求.在我组件的组件中,我有以下代码:
IntervalObservable.create(1000).subscribe(() => {
this.statusService.getStatus()
.subscribe(
(next) => {
this.state = next;
};
});
我试图实现我在这里阅读的解决方案,它处理相同的问题(但它是差不多2年前的帖子)Angular2 http在一个时间间隔,但是例如当我写IntervalObservable.takeWhile时它不再存在(rxjs)版本5.4.3).所以我想知道实现相同结果的方式是什么(即第一次不等待一秒钟获取结果并在组件被销毁时停止发送请求)
我试图HttpClient在我的Nativescript应用程序中使用Angular ,但是当我在我的组件中导入它时,我得到了Error: Trying to link invalid 'this' to a Java object
更新
我也尝试在Groceries示例中添加它而不更改任何其他内容,但它不起作用
{
"description": "ArkCash",
"license": "SEE LICENSE IN <your-license-filename>",
"readme": "NativeScript Application",
"repository": "<fill-your-repository-here>",
"nativescript": {
"id": "arkcash.chbtechnologies.ch.arkcash_mobile",
"tns-android": {
"version": "3.2.0"
}
},
"dependencies": {
"@angular/animations": "~4.4.6",
"@angular/common": "~4.4.6",
"@angular/compiler": "~4.4.6",
"@angular/core": "~4.4.6",
"@angular/forms": "~4.4.6",
"@angular/http": "~4.4.6",
"@angular/platform-browser": "~4.4.6",
"@angular/platform-browser-dynamic": "~4.4.6",
"@angular/router": "~4.4.6",
"@ngrx/core": "^1.2.0",
"@ngrx/effects": "^2.0.5",
"@ngrx/router-store": "^4.1.0",
"@ngrx/store": "^2.2.3",
"angular2-jwt": "^0.2.3",
"lodash": "^4.17.4",
"moment": "^2.19.1",
"nativescript-angular": "~4.4.1",
"nativescript-drop-down": "^3.2.0",
"nativescript-fabric": "^1.0.6",
"nativescript-pro-ui": …我想在可观察对象内部调用http请求，这使得从数据库进行选择操作。我做了两个服务，DbService和BackendService。
BackendService发出http发布请求并返回响应数据。在我的设计中，BackendService应该订阅DbService来获取URL，之后发出http发布请求，然后返回响应数据。
BackendService可以从DbService获取url，并尝试发出http请求，但不能。响应数据为（Json格式）
{"_isScalar":false,"source":{"_isScalar":false},"operator":{}}
我不明白这里发生了什么。我的服务和AppComponent文件在下面。
有BackendService
import { Injectable } from "@angular/core";
import { getString, setString } from "application-settings";
import { Headers, Http, Response, RequestOptions } from "@angular/http";
import { Observable } from "rxjs/Observable";
import 'rxjs/add/observable/of';
import "rxjs/add/operator/do";
import "rxjs/add/operator/map";
import "rxjs/add/observable/throw";
import "rxjs/add/operator/catch";
import { DbService } from "./db.service";
@Injectable()
export class BackendService {
static BaseUrl= "http://blabla.com"
constructor(public http: Http, private db: DbService) {
}
sendPost(key: string, requestObj: Object):Observable<any>{
console.log("sendPost: ");
return new Observable(obs=> { …我是新来的NativeScript。我正在遵循自己的文件。我正在尝试UI对齐。我无法实现这一目标。我正在使用Xcode IDE并在中运行iOS Simulator。
杂货徽标应位于顶部
文字栏位应在中间
注册按钮应该在底部
尝试1
<Page loaded="loaded">
<GridLayout height=auto horizontalAlignment="center" verticalAlignment="center" columns="*" rows="auto,auto,*" backgroundColor="brown">
<Image src="res://logo" stretch="aspectFit" horizontalAlignment="center" verticalAlignment="top" col="0" row="0"></Image>
<GridLayout columns="*" rows="auto,auto,auto" verticalAlignment="center" backgroundColor="lightgray" col="0" row="1">
<TextField class="userTxtFld" id="email" text="{{ email }}" hint="Email Address" keyboardType="email" autocorrect="false" autocapitalizationType="none" col="0" row="0"/>
<TextField secure="true" text="{{ password }}" hint="Password" col="0" row="1"/>
<Button text="Sign in" tap="signIn" col="0" row="2"/>
</GridLayout>
<Button text="Sign up for Groceries" class="link" tap="register" verticalAlignment="bottom" col="0" row="2"/>
</GridLayout>
</Page>
尝试2
<Page loaded="loaded">
<GridLayout …启动NativeScript Sidekick时，我从Windows出现了一个异常，指出以下内容（此错误消息也显示在Sidekick的输出Errors中）：（UnhandledPromiseRejectionWarning: ReferenceError: primordials is not defined为了更容易阅读，可以在底部找到错误的完整堆栈跟踪）
除了安装NativeScript Sidekick并打开应用程序外，我什么都没做。
我该如何解决这个问题？
(CLI) (node:6632) UnhandledPromiseRejectionWarning: ReferenceError: primordials is not defined
at fs.js:27:35
at req_ (userFolder\AppData\Roaming\.nativescript-cli\extensions\node_modules\natives\index.js:143:24)
at Object.req [as require] (userFolder\AppData\Roaming\.nativescript-cli\extensions\node_modules\natives\index.js:55:10)
at Object.<anonymous> (userFolder\AppData\Roaming\.nativescript-cli\extensions\node_modules\fstream\node_modules\graceful-fs\fs.js:1:37)
at Module._compile (internal/modules/cjs/loader.js:759:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:770:10)
at Module.load (internal/modules/cjs/loader.js:628:32)
at Function.Module._load (internal/modules/cjs/loader.js:555:12)
at Module.require (internal/modules/cjs/loader.js:666:19)
at require (internal/modules/cjs/helpers.js:16:16)
at Object.<anonymous> (userFolder\AppData\Roaming\.nativescript-cli\extensions\node_modules\fstream\node_modules\graceful-fs\graceful-fs.js:3:27)
at Module._compile (internal/modules/cjs/loader.js:759:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:770:10)
at Module.load (internal/modules/cjs/loader.js:628:32)
at Function.Module._load (internal/modules/cjs/loader.js:555:12)
at Module.require (internal/modules/cjs/loader.js:666:19)
at emitWarning (internal/process/promises.js:120:15)
at processPromiseRejections (internal/process/promises.js:168:7)
at processTicksAndRejections (internal/process/task_queues.js:90:32)
(node:6632) ReferenceError: …