Android 使用nativescript输入submit empty

我想注册用户，但我的输入值为空：

我一步一步地遵循这一点。我看不出我的代码有任何问题。有什么想法吗

Component.html

 <GridLayout backgroundColor="#CCCCCC">
        <ScrollView>
            <StackLayout margin="10" verticalAlignment="center">
                <StackLayout class="form" padding="15" backgroundColor="#FFFFFF">
                    <StackLayout class="input-field">
                        <Label text="First Name" class="label font-weight-bold m-b-5"></Label>
                        <TextField class="input" value="input.firstname"></TextField>
                        <StackLayout class="hr-light"></StackLayout>
                    </StackLayout>
                    <StackLayout class="input-field">
                        <Label text="Last Name" class="label font-weight-bold m-b-5"></Label>
                        <TextField class="input" [(ngModel)]="input.lastname"></TextField>
                        <StackLayout class="hr-light"></StackLayout>
                    </StackLayout>
                    <StackLayout class="input-field">
                        <Label text="Email" class="label font-weight-bold m-b-5"></Label>
                        <TextField class="input" [(ngModel)]="input.email"></TextField>
                        <StackLayout class="hr-light"></StackLayout>
                    </StackLayout>
                    <StackLayout class="input-field">
                        <Label text="Password" class="label font-weight-bold m-b-5"></Label>
                        <TextField  secure="true" [(ngModel)]="input.password" class="input" required></TextField>
                        <StackLayout class="hr-light"></StackLayout>
                    </StackLayout>
                    <Button class="btn btn-primary w-full" text="Register" (tap)="register()"></Button>
                </StackLayout>
            </StackLayout>
        </ScrollView>
    </GridLayout>

---

我不明白为什么我的值是空的！！您能问我一些想法吗？

若要在相关模块中导入

NativeScriptFormsModule

，请启用双向绑定检查。如果应用程序未使用延迟加载，则应将其作为主

app.module.ts

// Uncomment and add to NgModule imports if you need to use two-way binding
import { NativeScriptFormsModule } from "nativescript-angular/forms";

imports: [
    NativeScriptFormsModule // ADD it to imports
],

---

请注意，您共享的代码只是在应用程序设置中保存了一个键值，以后您应该重新使用该键值登录用户（通过访问特定的键

帐户
缺少firstname的模型）
// Uncomment and add to NgModule imports if you need to use two-way binding
import { NativeScriptFormsModule } from "nativescript-angular/forms";

imports: [
    NativeScriptFormsModule // ADD it to imports
],