NativeScript Angular 6双向绑定不适用于TextField

时间:2018-10-05 20:39:07

标签: angular nativescript angular2-nativescript nativescript-angular

简介

NativeScript版本4.2.4

Angular版本6.0

这是我关于nativescript的第一个应用程序。我对angular很熟悉,因此我需要选择nativescript而非ionic来构建本机混合应用程序。

场景

我使用同伴创建了此应用。现在,首先,我创建了两个TextField并将它们的文本与某些字符串属性绑定。在这里,我告诉大家,此模板默认情况下使用延迟加载,并且此应用程序中的所有组件都有各自的module.ts文件。

问题

绑定后,当我在智能手机上运行应用程序(实时同步)时。两种方式的数据绑定无效。我在这里共享我的代码。

  

app.module.ts

import { NgModule, NO_ERRORS_SCHEMA } from "@angular/core";
import { NativeScriptModule } from "nativescript-angular/nativescript.module";
import { NativeScriptUISideDrawerModule } from "nativescript-ui-sidedrawer/angular";
import { NativeScriptFormsModule } from "nativescript-angular/forms";

import { AppRoutingModule } from "./app-routing.module";
import { AppComponent } from "./app.component";

@NgModule({
    bootstrap: [
        AppComponent
    ],
    imports: [
        AppRoutingModule,
        NativeScriptModule,
        NativeScriptFormsModule,
        NativeScriptUISideDrawerModule
    ],
    declarations: [
        AppComponent
    ],
    schemas: [
        NO_ERRORS_SCHEMA
    ]
})
export class AppModule { }
  

home.module.ts

import { NgModule, NO_ERRORS_SCHEMA } from "@angular/core";
import { NativeScriptCommonModule } from "nativescript-angular/common";
import { NativeScriptFormsModule } from "nativescript-angular/forms";

import { HomeRoutingModule } from "./home-routing.module";
import { HomeComponent } from "./home.component";

@NgModule({
    imports: [
        NativeScriptCommonModule,
        NativeScriptFormsModule,
        HomeRoutingModule
    ],
    declarations: [
        HomeComponent
    ],
    schemas: [
        NO_ERRORS_SCHEMA
    ]
})
export class HomeModule { }
  

home.component.ts

import { Component, OnInit } from "@angular/core";
import { RadSideDrawer } from "nativescript-ui-sidedrawer";
import * as app from "tns-core-modules/application";

@Component({
    selector: "Home",
    moduleId: module.id,
    templateUrl: "./home.component.html"
})
export class HomeComponent implements OnInit {
    TestingText: string;
    constructor() {
        this.TestingText = 'anything';
        // Use the component constructor to inject providers.
    }

    ngOnInit(): void {

        // Init your component properties here.
    }

    onDrawerButtonTap(): void {
        const sideDrawer = <RadSideDrawer>app.getRootView();
        sideDrawer.showDrawer();
    }
}
  

home.component.html

<ActionBar class="action-bar">
    <!-- 
    Use the NavigationButton as a side-drawer button in Android
    because ActionItems are shown on the right side of the ActionBar
    -->
    <NavigationButton ios:visibility="collapsed" icon="res://menu" (tap)="onDrawerButtonTap()"></NavigationButton>
    <!-- 
    Use the ActionItem for IOS with position set to left. Using the
    NavigationButton as a side-drawer button in iOS is not possible,
    because its function is to always navigate back in the application.
    -->
    <ActionItem icon="res://navigation/menu" android:visibility="collapsed" (tap)="onDrawerButtonTap()" ios.position="left">
    </ActionItem>
    <Label class="action-bar-title" text="Home"></Label>
</ActionBar>

<FlexboxLayout class="page">
    <StackLayout class="form">
        <StackLayout class="input-field">
            <TextField hint="Type Something" [(ngModel)]="TestingText" secure="false" class="input input-border"></TextField>
            <StackLayout class="hr-light"></StackLayout>
        </StackLayout>

        <StackLayout class="input-field">
            <TextField hint="Binding" Text="{{TestingText}}" secure="false" class="input input-border"></TextField>
            <StackLayout class="hr-light"></StackLayout>
        </StackLayout>
    </StackLayout>
</FlexboxLayout>

此外,我还发现了以下相关问题

Binding doesnt work on textfield

但这在我的情况下不起作用。我认为我的问题是相同的,但技术不同。这个问题基于角度2,但在我的情况下,我使用角度6。

输出

enter image description here

2 个答案:

答案 0 :(得分:3)

您需要使用[(ngModel)]将其绑定到另一个文本字段

<TextField [(ngModel)]="TestingText"></TextField>

[text]将其绑定到标签

<Label [text]="TestingText"></Label>

答案 1 :(得分:1)

这是您需要的工作代码的游乐场链接

https://play.nativescript.org/?template=play-ng&id=76g6B9

home.component.html

<TextField [(ngModel)]="textFieldData"></TextField>

<Label [text]="labelData"></Label>

<TextView [(ngModel)]="textViewData"></TextView>

home.component.ts

textViewData: string = "hey this is text view";
labelData: string = "hey this is label";
textFieldData: string = "hey this is text field";