react-native-modal-dropdown

react-native-modal-dropdown

A react-native dropdown/picker/selector component for both Android & iOS.

Features

• Pure JS.
• Compatible with both iOS and Android.
• Auto position. (Won't be covered or clipped by the edge of screen.)
• Zero configuration. (Options are needed of course or a loading indicator will show.)
• Highly customizable.
• Controllable with API by code. (Show/Hide/Select)
• Change everything into a dropdown list trigger.

Demo

You can find them in the example.

Update History

v0.4.0

• New feature: #10 Support touchable component in renderRow.
• New feature: #11 Open renderSeparator prop API.
• New feature: Add adjustFrame prop for user to adjust the frame style of the dropdown in case the component calculate a mistake frame. (refer to #9) (code sample)
• Enhancement: Compatible with react-native v0.36.0 which has a break change causes the default button with zero size.
• Enhancement: #16 Prevent from warnings if array of styles is used instead of stylesheet or object. Thanks to @NikolaBorislavovHristov .

v0.3.2

• Fix bug: #9 undefined is not an object (evaluating '_this.updatePosition.bind') in v0.3.1.
• Fix bug: Wrong width of dropdown in very few cases.

v0.3.1

• Fix bug: #6 Can not specify height style for dropdownStyle.
• Remove updatePosition function.

v0.3.0

• Auto update position before show.
• Mark updatePosition function as depreciated. (May be removed in next version.)

v0.2.0

• Add wrapper / container support

Now you can use these component as a wrapper / container. Anything wrapped in it can be the trigger of the dropdown.

Installation

npm i react-native-modal-dropdown -S

Usage

Basic

Import this module:

import ModalDropdown from 'react-native-modal-dropdown';

Use as a component:

<ModalDropdown options={['option 1', 'option 2']}/>

Use as a wrapper / container:

<ModalDropdown options={['option 1', 'option 2']}>
  ...
</ModalDropdown>

Customization

Give the style props as your choice:

• style: Change the style of the button (basic mode) / container (wrapper mode).
• textStyle: Change the style of text of the button. Invalid in wrapper mode.
• dropdownStyle: Change the style of dropdown container.

You can also render your option row and row separator by implement renderRow and renderSeparator function.

API

Props

Prop	Type	Optional	Default	Description
disabled	bool	Yes	false	disable/enable the component.
defaultIndex	number	Yes	-1	Init selected index. -1: None is selected. This only change the highlight of the dropdown row, you have to give a defaultValue to change the init text.
defaultValue	string	Yes	Please select...	Init text of the button. Invalid in wrapper mode.
options	arrayOf(string)	Yes		Options. The dropdown will show a loading indicator if options is null/undefined.
style	object	Yes		Style of the button.
textStyle	object	Yes		Style of the button text. Invalid in wrapper mode.
dropdownStyle	object	Yes		Style of the dropdown list.
adjustFrame	func	Yes		This is a callback after the frame of the dropdown have been calculated and before showing. You will receive a style object as argument with some of the props like width height top left and right. Change them to appropriate values that accord with your requirement and make the new style as the return value of this function.
renderRow	func	Yes		Customize render option rows. Will render a default row if null/undefined.
renderSeparator	func	Yes		Customize render dropdown list separators. Will render a default thin gray line if null/undefined.
onDropdownWillShow	func	Yes		Trigger when dropdown will show by touching the button. Return false can cancel the event.
onDropdownWillHide	func	Yes		Trigger when dropdown will hide by touching the button. Return false can cancel the event.
onSelect	func	Yes		Trigger when option row touched with selected index and value. Return false can cancel the event.

Methods

Method	Description
show()	Show the dropdown. Won't trigger onDropdownWillShow.
hide()	Hide the dropdown. Won't trigger onDropdownWillHide.
select(idx)	Select the specified option of the idx. Select -1 will reset it to display defaultValue. Won't trigger onSelect.

Next version

Any suggestion is welcome.