Picker

@nativescript/picker #

A NativeScript plugin that provides ui element for picking an object/value from a list opened in a modal popup.

npm install @nativescript/picker

Usage #

• Configuration
• Usage
• Features
  • PickerField
• API

Screenshots #

Configuration #

No additional configuration required!

Usage #

To use the PickerField in markup you need to:

• If you are developing a NativeScript Core app, you need to register the plugin namespace in the xml:

<Page
   xmlns="http://schemas.nativescript.org/tns.xsd"
   xmlns:picker="@nativescript/picker">
   <picker:PickerField hint="Click here" items="{{ pickerItems }}"/>
...

• If you are developing a NativeScript Angular app, you need to import the plugin module in the module of your component:

import { NativeScriptPickerModule } from "@nativescript/picker/angular";
...
@NgModule({
    imports: [
        NativeScriptPickerModule,
        ...
    ],
    ...

Then you will be able to declare the fields in the html of your component:

<PickerField hint="Click here" [items]="pickerItems"></PickerField>

Custom item template #

You can also define your own item template in the list that is opened:

<PickerField
  hint="Click here"
  class="picker-field"
  textField="name"
  [pickerTitle]="'Select item from list'"
  [items]="items"
>
  <ng-template let-item="item">
    <GridLayout columns="auto, *" rows="auto, *">
      <label text="Static text:" col="0"></label>
      <label [text]="item?.name" col="0" row="1"></label>
      <image [src]="item?.imageUrl" col="1" row="0" rowSpan="2"></image>
    </GridLayout>
  </ng-template>
</PickerField>

With the following bindings:

interface IDataItem {
  name: string
  id: number
  description: string
  imageUrl: string
}

this.items = new ObservableArray<IDataItem>()
for (let i = 0; i < 20; i++) {
  this.items.push({
    name: 'Item ' + i,
    id: i,
    description: 'Description ' + i,
    imageUrl: 'https://picsum.photos/150/70/?random'
  })
}

• If you are developing a NativeScript Vue app, you need to install the plugin in you app.js file:

import Vue from 'nativescript-vue'
import PickerField from '@nativescript/picker/vue'

Vue.use(PickerField)

Then you will be able to declare the fields in the template of your component:

<PickerField hint="Click here"></PickerField>

Features #

PickerField #

The PickerField is a NativeScript TextField which means that any functionality the default TextField provides is also available in the PickerField component. The only difference is that by design it is in "read-only" mode, or simply put you cannot change its text by input or select that text. Changing the text of the PickerField is done by its main functionality which is opening a modal popup that shows a list of objects from which you can select one by tapping it.

API #

PickerField #

The PickerField can be targeted in CSS through its element selector and additionally by setting a class. The PickerField also opens a modal window containing a Page element that contains an ActionBar and a ListView. This Page element can be targeted with the PickerPage selector and through it style all picker modals with selectors like PickerPage ActionBar and PickerPage ListView. In addition to that, if you set a class on the PickerField, it will be transferred on the PickerPage and with it you can style individual modals.