react-native-dropdow-spinner v0.0.1

React native dropdown picker v3

A single / multiple, searchable item picker (dropdown) component for react native which supports both Android & iOS.

Caution (incompatibility)

x < 3.0.0 Versions are incompatible with the current version.

It's required to follow the docs in order to upgrade the package to v3.x

Dependencies

Our package only requires react-native-vector-icons to be installed.
https://github.com/oblador/react-native-vector-icons

Changelog

• Added globalTextStyle. February 11, 2021
• Added onSearch. January 27, 2021
• Added labelProps. January 06, 2021
• Some bug-fixes. January 06, 2021
• Added containerProps. December 21, 2020

Getting Started

Installation

via NPM

npm install react-native-dropdown-picker --save

via Yarn

yarn add react-native-dropdown-picker

Basic Usage

The first step is to import the package.

import DropDownPicker from 'react-native-dropdown-picker';

Single

Select a single item.

import Icon from 'react-native-vector-icons/Feather';

this.state = {
    country: 'uk'
}

<DropDownPicker
    items={[
        {label: 'USA', value: 'usa', icon: () => <Icon name="flag" size={18} color="#900" />, hidden: true},
        {label: 'UK', value: 'uk', icon: () => <Icon name="flag" size={18} color="#900" />},
        {label: 'France', value: 'france', icon: () => <Icon name="flag" size={18} color="#900" />},
    ]}
    defaultValue={this.state.country}
    containerStyle={{height: 40}}
    style={{backgroundColor: '#fafafa'}}
    itemStyle={{
        justifyContent: 'flex-start'
    }}
    dropDownStyle={{backgroundColor: '#fafafa'}}
    onChangeItem={item => this.setState({
        country: item.value
    })}
/>

Multiple

Select multiple items.

import Icon from 'react-native-vector-icons/Feather';

this.state = {
    countries: ['uk']
}

<DropDownPicker
    items={[
        {label: 'UK', value: 'uk', icon: () => <Icon name="flag" size={18} color="#900" />},
        {label: 'France', value: 'france', icon: () => <Icon name="flag" size={18} color="#900" />},
    ]}

    multiple={true}
    multipleText="%d items have been selected."
    min={0}
    max={10}

    defaultValue={this.state.countries}
    containerStyle={{height: 40}}
    itemStyle={{
        justifyContent: 'flex-start'
    }}
    onChangeItem={item => this.setState({
        countries: item // an array of the selected items
    })}
/>

Searchable items

Search for specific items.

searchable={true}
searchablePlaceholder="Search for an item"
searchablePlaceholderTextColor="gray"
seachableStyle={{}}
searchableError={() => <Text>Not Found</Text>}
onSearch={text => {
    // Example
    if (this._API.isFetching())
        this._API.abort();

    this._API = this.fetchFromServer(text, (items) => {
        // See controller: https://github.com/hossein-zare/react-native-dropdown-picker#controller
        this.controller.resetItems(items); // Maybe a new method will be introduced for a better UX!
    });
}}

Default item

You may want to select one of the items as default.

Use one of these ways:

1. Add selected: true to the object. (This method is not state-friendly!)

   items={[
       {label: 'Item 1', value: 'item1'},
       {label: 'Item 2', value: 'item2', selected: true, disabled: true},
   ]}

2. The defaultValue property.

   defaultValue = 'uk'; // Single
   defaultValue = ['uk']; // Multiple

Placeholder

You may want to have a placeholder while the default value is null or an empty array.

Add the following properties to the component.

this.state = {
    data: null, // Single
    data: [] // Multiple
}

...
defaultValue={this.state.data}
placeholder="Select an item"
...

Controller

The controller property gives you full access to the DropDownPicker methods and properties.

Usage

Class Components

constructor(props) {
    this.state = {
        value: null,
        items: []
    }

    this.controller;
}

<DropDownPicker
    items={this.state.items}
    controller={instance => this.controller = instance}
    onChangeList={(items, callback) => {
        this.setState({
            items // items: items
        }, callback);
    }}

    defaultValue={this.state.value}
    onChangeItem={item => this.setState({
        value: item.value
    })}
/>

Functional Components

const [value, setValue] = useState(null);
const [items, setItems] = useState([ {...}, ... ]);
let controller;

<DropDownPicker
    items={items}
    controller={instance => controller = instance}
    onChangeList={(items, callback) => {
        new Promise((resolve, reject) => resolve(setItems(items)))
            .then(() => callback())
            .catch(() => {});
    }}

    defaultValue={value}
    onChangeItem={item => setValue(item.value)}
/>

in Class components you can call methods using this.controller.METHOD_NAME() and controller.METHOD_NAME() in Functional components.

1. Reset the state.

   You may want to reset the state of your picker.

   this.controller.reset();

2. Reset items.

   The second argument is your default value. (Optional)

   this.controller.resetItems([{}, {}, ...]);
   
   this.controller.resetItems([{}, {}, ...], 'uk'); // Single
   this.controller.resetItems([{}, {}, ...], ['uk', ...]); // Multiple

3. Select an item manually.

   You may want to select an item manually.

   // Single
   this.controller.selectItem('uk');
   
   // Multiple
   this.controller.selectItem(['uk', 'france']);

4. Add items manually.

   There are two methods to help you add items manually.

   this.controller.addItem({
     label: 'UK',
     value: 'uk',
     icon: () => {},
   });
   this.controller.addItems([
     {
       label: 'UK',
       value: 'uk',
       icon: () => {},
     },
   ]);

5. Remove items

   this.controller.removeItem('uk', {
     changeDefaultValue: true, // Unselect if the removed item is the selected item
   });

6. Check if the dropdown is open

   this.controller.isOpen(); // boolean

7. Open, close or toggle.

   this.controller.open();
   this.controller.close();
   this.controller.toggle();

Styling the component

There are 13 props to style the component.

1. The style property.

   Use this to adjust the inner part of the picker.

   style={{paddingVertical: 10}}

2. The dropDownStyle property.

   Additional styles for the dropdown box.

   dropDownStyle={{backgroundColor: '#fafafa'}}

3. The containerStyle property.

   Use this to adjust the outer part of the picker such as margin, width, height, flex, ...

   containerStyle={{width: 150, height: 70}}

4. The itemStyle property.

   If you want the labels on the left and right side or to centerize them:

   itemStyle={{justifyContent: 'flex-start|flex-end|center'}}

5. The labelStyle property.

   This property gives full control over the label.

   labelStyle={{
       fontSize: 14,
       textAlign: 'left',
       color: '#000'
   }}

6. The selectedLabelStyle property.

   Changes the style of the selected item label.

   selectedLabelStyle={{
       color: '#39739d'
   }}

7. The placeholderStyle property.

   It is possible to style the placeholder text with this property.

   placeholderStyle={{
       fontWeight: 'bold',
       textAlign: 'center'
   }}

8. The activeItemStyle property.

   This property allows you to style the active item.

   activeItemStyle={{justifyContent: 'center'}}

9. The activeLabelStyle property.

   This property allows you to style the active label.

   activeLabelStyle={{color: 'red'}}

10. The arrowStyle property.

    Adds your additional styles to the View element of the arrow.

    arrowStyle={{marginRight: 10}}

11. The searchableStyle property.

    Additional styles for the TextInput

    searchableStyle={{backgroundColor: '#dfdfdf'}}

12. The searchablePlaceholderTextColor property.

    Assigns a new color to the placeholder text.

    searchablePlaceholderTextColor="silver"

13. The globalTextStyle property.

    You can style <Text /> elements globally.

    globalTextStyle={{
        fontFamily: "MyFontName",
        fontSize: 15
    }}

RTL Support

1. The selected item

   

   style={{
       flexDirection: 'row-reverse',
   }}
   labelStyle={{
       textAlign: 'right',
   }}

2. The dropdown items

   

   itemStyle={{
       flexDirection: 'row-reverse',
       justifyContent: 'flex-start',
   }}

FAQ

Multiple pickers and the open dropdown issue

Clicking on another picker doesn't close the other pickers? This can be fixed with the help of state.

this.state = {
    itemA: null,
    isVisibleA: false,

    itemB: null,
    isVisibleB: false
}

changeVisibility(state) {
    this.setState({
        isVisibleA: false,
        isVisibleB: false,
        ...state
    });
}

// Picker A
<DropDownPicker
    items={[
        {label: 'UK', value: 'uk'},
        {label: 'France', value: 'france'},
    ]}
    defaultValue={this.state.itemA}
    containerStyle={{height: 40}}

    isVisible={this.state.isVisibleA}
    onOpen={() => this.changeVisibility({
        isVisibleA: true
    })}
    onClose={() => this.setState({
        isVisibleA: false
    })}
    onChangeItem={item => this.setState({
        itemA: item.value
    })}
/>

// Picker B
<DropDownPicker
    items={[
        {label: 'UK', value: 'uk'},
        {label: 'France', value: 'france'},
    ]}
    defaultValue={this.state.itemB}
    containerStyle={{height: 40}}

    isVisible={this.state.isVisibleB}
    onOpen={() => this.changeVisibility({
        isVisibleB: true
    })}
    onClose={() => this.setState({
        isVisibleB: false
    })}
    onChangeItem={item => this.setState({
        itemB: item.value
    })}
/>

borderRadius

The only thing you have to avoid is borderRadius. All the corners must be set separately.

style={{
    borderTopLeftRadius: 10, borderTopRightRadius: 10,
    borderBottomLeftRadius: 10, borderBottomRightRadius: 10
}}
dropDownStyle={{
    borderBottomLeftRadius: 20, borderBottomRightRadius: 20
}}

zIndex conflicts (Untouchable Items, Overlapping pickers)

1. Using the containerStyle property to style the picker results in unexpected behaviors like untouchable items.

   The style and dropDownStyle properties must be used instead.
   Use the containerStyle prop to adjust the outer part of the picker such as margin, width, height, flex, ...

2. Nested Views

   You have to add zIndex to the nested views which contain the picker.
   Note! zIndex locks the picker on Android, The solution is to use the Platform.OS

   import { Platform } from 'react-native';
   
   <View
       style={{
           ...(Platform.OS !== 'android' && {
               zIndex: 10
           })
       }}
   >
       <DropDownPicker ... />
   </View>

   Demo: https://snack.expo.io/@hossein-zare/823437

3. DropDownPicker wrapped by <View style={{backgroundColor: ..., border[...]: ..., elevation: ...}}>
   These props will make your dropdown untouchable.
   Remove all the backgroundColor, border[...], elevation, ... style properties from the parent element.
   https://github.com/hossein-zare/react-native-dropdown-picker/issues/40#issuecomment-651744446

4. Multiple Pickers

   <DropDownPicker zIndex={5000} />
   <DropDownPicker zIndex={4000} />
   <DropDownPicker zIndex={3000} />

Dropdown Overflow

Adding borders to the component will separate elements or they will overflow. to solve this issue you just need to add marginTop to the dropDownStyle and specify the value which fits your component well.

dropDownStyle={{marginTop: 2}}

Props