TextInput

TextInput 是一个允许用户在应用中通过键盘输入文本的基本组件。本组件的属性提供了多种特性的配置，譬如自动完成、自动大小写、占位文字，以及多种不同的键盘类型（如纯数字键盘）等等。

最简单的用法就是丢一个TextInput到应用里，然后订阅它的onChangeText事件来读取用户的输入。注意，从 TextInput 里取值这就是目前唯一的做法！也就是使用在onChangeText中用setState把用户的输入写入到 state 中，然后在需要取值的地方从 this.state 中取出值。它还有一些其它的事件，譬如onSubmitEditing和onFocus。一个简单的例子如下：

Two methods exposed via the native element are .focus() and .blur() that will focus or blur the TextInput programmatically.

注意有些属性仅在multiline为 true 或者为 false 的时候有效。此外，当multiline=false时，为元素的某一个边添加边框样式（例如：borderBottomColor，borderLeftWidth等）将不会生效。为了能够实现效果你可以使用一个View来包裹TextInput：

TextInput has a border at the bottom of its view by default. This border has its padding set by the background image provided by the system, and it cannot be changed. Solutions to avoid this are to either not set height explicitly, in which case the system will take care of displaying the border in the correct position, or to not display the border by setting underlineColorAndroid to transparent.

又又，在安卓上长按选择文本会导致windowSoftInputMode设置变为adjustResize，这样可能导致绝对定位的元素被键盘给顶起来。要解决这一问题你需要在 AndroidManifest.xml 中明确指定合适的windowSoftInputMode(https://developer.android.com/guide/topics/manifest/activity-element.html)值，或是自己监听事件来处理布局变化。

---

Reference

Props

View Props

Inherits View Props.

---

allowFontScaling

控制字体是否要根据系统的“字体大小”辅助选项来进行缩放。默认值为true。

Type
bool

---

autoCapitalize

控制 TextInput 是否要自动将特定字符切换为大写，This property is not supported by some keyboard types such as name-phone-pad.

• characters: 所有的字符。
• words: 每个单词的第一个字符。
• sentences: 每句话的第一个字符（默认）。
• none: 不切换。

Type
enum('none', 'sentences', 'words', 'characters')

---

autoComplete

Specifies autocomplete hints for the system, so it can provide autofill. On Android, the system will always attempt to offer autofill by using heuristics to identify the type of content. To disable autocomplete, set autoComplete to off.

The following values work across platforms:

• additional-name
• address-line1
• address-line2
• birthdate-day (iOS 17+)
• birthdate-full (iOS 17+)
• birthdate-month (iOS 17+)
• birthdate-year (iOS 17+)
• cc-csc (iOS 17+)
• cc-exp (iOS 17+)
• cc-exp-day (iOS 17+)
• cc-exp-month (iOS 17+)
• cc-exp-year (iOS 17+)
• cc-number
• country
• current-password
• email
• family-name
• given-name
• honorific-prefix
• honorific-suffix
• name
• new-password
• off
• one-time-code
• postal-code
• street-address
• tel
• username

iOS

The following values work on iOS only:

• cc-family-name (iOS 17+)
• cc-given-name (iOS 17+)
• cc-middle-name (iOS 17+)
• cc-name (iOS 17+)
• cc-type (iOS 17+)
• nickname
• organization
• organization-title
• url

Android

The following values work on Android only:

• gender
• name-family
• name-given
• name-middle
• name-middle-initial
• name-prefix
• name-suffix
• password
• password-new
• postal-address
• postal-address-country
• postal-address-extended
• postal-address-extended-postal-code
• postal-address-locality
• postal-address-region
• sms-otp
• tel-country-code
• tel-device
• tel-national
• username-new

Type

enum('additional-name', 'address-line1', 'address-line2', 'birthdate-day', 'birthdate-full', 'birthdate-month', 'birthdate-year', 'cc-csc', 'cc-exp', 'cc-exp-day', 'cc-exp-month', 'cc-exp-year', 'cc-number', 'country', 'current-password', 'email', 'family-name', 'given-name', 'honorific-prefix', 'honorific-suffix', 'name', 'new-password', 'off', 'one-time-code', 'postal-code', 'street-address', 'tel', 'username', 'cc-family-name', 'cc-given-name', 'cc-middle-name', 'cc-name', 'cc-type', 'nickname', 'organization', 'organization-title', 'url', 'gender', 'name-family', 'name-given', 'name-middle', 'name-middle-initial', 'name-prefix', 'name-suffix', 'password', 'password-new', 'postal-address', 'postal-address-country', 'postal-address-extended', 'postal-address-extended-postal-code', 'postal-address-locality', 'postal-address-region', 'sms-otp', 'tel-country-code', 'tel-device', 'tel-national', 'username-new')

---

autoCorrect

如果为 false，会关闭拼写自动修正。默认值是 true。

Type
bool

---

autoFocus

如果为 true，在componentDidMount后会获得焦点。默认值为 false。

Type
bool

---

blurOnSubmit

如果为 true，文本框会在提交的时候失焦。对于单行输入框默认值为 true，多行则为 false。注意：对于多行输入框来说，如果将blurOnSubmit设为 true，则在按下回车键时就会失去焦点同时触发onSubmitEditing事件，而不会换行。

Type
bool

---

caretHidden

如果为 true，则隐藏光标。默认值为 false。

Type
bool

---

clearButtonMode

iOS

是否要在文本框右侧显示“清除”按钮。仅在单行模式下可用。默认值为never。

Type
enum('never', 'while-editing', 'unless-editing', 'always')

---

clearTextOnFocus

iOS

如果为 true，每次开始输入的时候都会清除文本框的内容。

Type
bool

---

contextMenuHidden

If true, context menu is hidden. The default value is false.

Type
bool

---

dataDetectorTypes

iOS

设置 text input 内能被转化为可点击 URL 的数据的类型。当且仅当multiline={true}和editable={false}时起作用。默认情况下不检测任何数据类型。

可接受一个类型值或类型值数组。

dataDetectorTypes的可用值有:

• 'phoneNumber'
• 'link'
• 'address'
• 'calendarEvent'
• 'none'
• 'all'

Type
enum('phoneNumber', 'link', 'address', 'calendarEvent', 'none', 'all'), ,array of enum('phoneNumber', 'link', 'address', 'calendarEvent', 'none', 'all')

---

defaultValue

提供一个文本框中的初始值。当用户开始输入的时候，值就可以改变。在一些简单的使用情形下，如果你不想用监听消息然后更新 value 属性的方法来保持属性和状态同步的时候，就可以用 defaultValue 来代替。

Type
string

---

cursorColor

Android

When provided it will set the color of the cursor (or "caret") in the component. Unlike the behavior of selectionColor the cursor color will be set independently from the color of the text selection box.

Type
color

---

disableFullscreenUI

Android

当值为 false 时, 如果 text input 的周围有少量可用空间的话（比如说，当手机横过来时），操作系统可能会将这个 text input 设置为全屏模式。当值为 true 时, 这个特性不可用，text input 就是普通的模式。默认为 false。

Type
bool

---

editable

如果为 false，文本框是不可编辑的。默认值为 true。

Type
bool

---

enablesReturnKeyAutomatically

iOS

If true, the keyboard disables the return key when there is no text and automatically enables it when there is text. The default value is false.

Type
bool

---

enterKeyHint

Determines what text should be shown to the return key. Has precedence over the returnKeyType prop.

The following values work across platforms:

• enter
• done
• next
• search
• send

Android Only

The following values work on Android only:

• previous

Type
enum('enter', 'done', 'next', 'previous', 'search', 'send')

---

importantForAutofill

Android

Tells the operating system whether the individual fields in your app should be included in a view structure for autofill purposes on Android API Level 26+. Possible values are auto, no, noExcludeDescendants, yes, and yesExcludeDescendants. The default value is auto.

• auto: Let the Android System use its heuristics to determine if the view is important for autofill.
• no: This view isn't important for autofill.
• noExcludeDescendants: This view and its children aren't important for autofill.
• yes: This view is important for autofill.
• yesExcludeDescendants: This view is important for autofill, but its children aren't important for autofill.

Type
enum('auto', 'no', 'noExcludeDescendants', 'yes', 'yesExcludeDescendants')

---

inlineImageLeft

Android

指定一个图片放置在左侧。图片必须放置在/android/app/src/main/res/drawable目录下，经过编译后按如下形式引用（无路径无后缀）：

<TextInput
 inlineImageLeft='search_icon'
/>

Type
string

---

inlineImagePadding

Android

Padding between the inline image, if any, and the text input itself.

Type
number

---

inputAccessoryViewID

iOS

An optional identifier which links a custom InputAccessoryView to this text input. The InputAccessoryView is rendered above the keyboard when this text input is focused.

Type
string

---

inputMode

Works like the inputmode attribute in HTML, it determines which keyboard to open, e.g. numeric and has precedence over keyboardType.

Support the following values:

• none
• text
• decimal
• numeric
• tel
• search
• email
• url

Type
enum('decimal', 'email', 'none', 'numeric', 'search', 'tel', 'text', 'url')

---

keyboardAppearance

iOS

Determines the color of the keyboard.

Type
enum('default', 'light', 'dark')

---

keyboardType

决定弹出何种软键盘类型，譬如numeric（纯数字键盘）。

See screenshots of all the types here.

这些值在所有平台都可用：

• default
• number-pad
• decimal-pad
• numeric
• email-address
• phone-pad
• url

下面的值仅 iOS 可用：

• ascii-capable
• numbers-and-punctuation
• name-phone-pad
• twitter
• web-search

下面的值仅 Android 可用：

• visible-password

Type
enum('default', 'email-address', 'numeric', 'phone-pad', 'ascii-capable', 'numbers-and-punctuation', 'url', 'number-pad', 'name-phone-pad', 'decimal-pad', 'twitter', 'web-search', 'visible-password')

---

maxFontSizeMultiplier

Specifies largest possible scale a font can reach when allowFontScaling is enabled. Possible values:

• null/undefined (default): inherit from the parent node or the global default (0)
• 0: no max, ignore parent/global default
• >= 1: sets the maxFontSizeMultiplier of this node to this value

Type
number

---

maxLength

限制文本框中最多的字符数。使用这个属性而不用 JS 逻辑去实现，可以避免闪烁的现象。

Type
number

---

multiline

如果为 true，文本框中可以输入多行文字。默认值为 false。注意安卓上如果设置multiline = {true}，文本默认会垂直居中，可设置textAlignVertical: 'top'样式来使其居顶显示。

Type
bool

---

numberOfLines

Android

设置输入框的行数。当 multiline 设置为 true 时使用它，可以占据对应的行数。

Type
number

---

onBlur

当文本框失去焦点的时候调用此回调函数。

Note: If you are attempting to access the text value from nativeEvent keep in mind that the resulting value you get can be undefined which can cause unintended errors. If you are trying to find the last value of TextInput, you can use the onEndEditing event, which is fired upon completion of editing.

Type
function

---

onChange

当文本框内容变化时调用此回调函数。回调参数为{ nativeEvent: { eventCount, target, text} }。

Type
({nativeEvent: {eventCount, target, text}}) => void

---

onChangeText

当文本框内容变化时调用此回调函数。改变后的文字内容会作为参数传递。

Type
function

---

onContentSizeChange

Callback that is called when the text input's content size changes.

Only called for multiline text inputs.

Type
({nativeEvent: {contentSize: {width, height} }}) => void

---

onEndEditing

当文本输入结束后调用此回调函数。

Type
function

---

onPressIn

Callback that is called when a touch is engaged.

Type
({nativeEvent: PressEvent}) => void

---

onPressOut

Callback that is called when a touch is released.

Type
({nativeEvent: PressEvent}) => void

---

onFocus

当文本框获得焦点的时候调用此回调函数。回调参数为{ nativeEvent: { target } }。

Type
({nativeEvent: LayoutEvent}) => void

---

onKeyPress

当一个键被按下的时候调用此回调。传递给回调函数的参数为{ nativeEvent: { key: keyValue } }，其中keyValue即为被按下的键。会在 onChange 之前调用。注意：在 Android 上只有软键盘会触发此事件，物理键盘不会触发。

Type
({nativeEvent: {key: keyValue} }) => void

---

onLayout

当组件加载或者布局变化的时候调用，回调参数为{ nativeEvent: {layout: {x, y, width, height}, target } }。

Type
({nativeEvent: LayoutEvent}) => void

---

onScroll

在内容滚动时持续调用，传回参数的格式形如{ nativeEvent: { contentOffset: { x, y } } }。也可能包含其他和滚动事件相关的参数，但是在 Android 上，出于性能考虑，不会提供contentSize参数。

Type
({nativeEvent: {contentOffset: {x, y} }}) => void

---

onSelectionChange

光标位置变化时，传回参数的格式形如{ nativeEvent: { selection: { start, end } } }。

Type
({nativeEvent: {selection: {start, end} }}) => void

---

onSubmitEditing

此回调函数当软键盘的确定/提交按钮被按下的时候调用此函数，所传参数为{nativeEvent: {text, eventCount, target}}。如果multiline={true}，此属性不可用。

Type
({nativeEvent: {text, eventCount, target}}) => void

Note that on iOS this method isn't called when using keyboardType="phone-pad".

---

placeholder

The string that will be rendered before text input has been entered.

Type
string

---

placeholderTextColor

The text color of the placeholder string.

Type
color

---

readOnly

If true, text is not editable. The default value is false.

Type
bool

---

returnKeyLabel

Android

Sets the return key to the label. Use it instead of returnKeyType.

Type
string

---

returnKeyType

决定“确定”按钮显示的内容。在 Android 上你还可以使用returnKeyLabel。

下列这些选项是跨平台可用的：

• done
• go
• next
• search
• send

下列这些选项仅 Android 可用：

• none
• previous

下列这些选项仅 iOS 可用：

• default
• emergency-call
• google
• join
• route
• yahoo

Type
enum('done', 'go', 'next', 'search', 'send', 'none', 'previous', 'default', 'emergency-call', 'google', 'join', 'route', 'yahoo')

rejectResponderTermination

iOS

If true, allows TextInput to pass touch events to the parent component. This allows components such as SwipeableListView to be swipeable from the TextInput on iOS, as is the case on Android by default. If false, TextInput always asks to handle the input (except when disabled). The default value is true.

Type
bool

---

rows

Android

Sets the number of lines for a TextInput. Use it with multiline set to true to be able to fill the lines.

Type
number

---

scrollEnabled

iOS

If false, scrolling of the text view will be disabled. The default value is true. Only works with multiline={true}.

Type
bool

---

secureTextEntry

如果为 true，文本框会遮住之前输入的文字，这样类似密码之类的敏感文字可以更加安全。默认值为 false。multiline={true}时不可用。

Type
bool

---

selection

设置选中文字的范围（指定首尾的索引值）。如果首尾为同一索引位置，则相当于指定光标的位置。

Type
object: {start: number,end: number}

---

selectionColor

设置输入框高亮时的颜色（还包括光标）。

Type
color

---

selectTextOnFocus

如果为 true，当获得焦点的时候，所有的文字都会被选中。

Type
bool

---

showSoftInputOnFocus

When false, it will prevent the soft keyboard from showing when the field is focused. The default value is true.

Type
bool

---

spellCheck

iOS

如果设置为false，则禁用拼写检查的样式（比如错误拼写的单词下的红线）。默认值继承自autoCorrect。

Type
bool

---

textAlign

Align the input text to the left, center, or right sides of the input field.

Possible values for textAlign are:

• left
• center
• right

Type
enum('left', 'center', 'right')

---

textContentType

iOS

Give the keyboard and the system information about the expected semantic meaning for the content that users enter.

note

autoComplete, provides the same functionality and is available for all platforms. You can use Platform.select for differing platform behaviors.

Avoid using both textContentType and autoComplete. For backwards compatibility, textContentType takes precedence when both properties are set.

You can set textContentType to username or password to enable autofill of login details from the device keychain.

newPassword can be used to indicate a new password input the user may want to save in the keychain, and oneTimeCode can be used to indicate that a field can be autofilled by a code arriving in an SMS.

To disable autofill, set textContentType to none.

Possible values for textContentType are:

• none
• addressCity
• addressCityAndState
• addressState
• birthdate (iOS 17+)
• birthdateDay (iOS 17+)
• birthdateMonth (iOS 17+)
• birthdateYear (iOS 17+)
• countryName
• creditCardExpiration (iOS 17+)
• creditCardExpirationMonth (iOS 17+)
• creditCardExpirationYear (iOS 17+)
• creditCardFamilyName (iOS 17+)
• creditCardGivenName (iOS 17+)
• creditCardMiddleName (iOS 17+)
• creditCardName (iOS 17+)
• creditCardNumber
• creditCardSecurityCode (iOS 17+)
• creditCardType (iOS 17+)
• emailAddress
• familyName
• fullStreetAddress
• givenName
• jobTitle
• location
• middleName
• name
• namePrefix
• nameSuffix
• newPassword
• nickname
• oneTimeCode
• organizationName
• password
• postalCode
• streetAddressLine1
• streetAddressLine2
• sublocality
• telephoneNumber
• URL
• username

Type

enum('none', 'addressCity', 'addressCityAndState', 'addressState', 'birthdate', 'birthdateDay', 'birthdateMonth', 'birthdateYear', 'countryName', 'creditCardExpiration', 'creditCardExpirationMonth', 'creditCardExpirationYear', 'creditCardFamilyName', 'creditCardGivenName', 'creditCardMiddleName', 'creditCardName', 'creditCardNumber', 'creditCardSecurityCode', 'creditCardType', 'emailAddress', 'familyName', 'fullStreetAddress', 'givenName', 'jobTitle', 'location', 'middleName', 'name', 'namePrefix', 'nameSuffix', 'newPassword', 'nickname', 'oneTimeCode', 'organizationName', 'password', 'postalCode', 'streetAddressLine1', 'streetAddressLine2', 'sublocality', 'telephoneNumber', 'URL', 'username')

---

passwordRules

iOS

When using textContentType as newPassword on iOS we can let the OS know the minimum requirements of the password so that it can generate one that will satisfy them. In order to create a valid string for PasswordRules take a look to the Apple Docs.

If passwords generation dialog doesn't appear please make sure that:

• AutoFill is enabled: Settings → Passwords & Accounts → toggle "On" the AutoFill Passwords,
• iCloud Keychain is used: Settings → Apple ID → iCloud → Keychain → toggle "On" the iCloud Keychain.

Type
string

---

style

Note that not all Text styles are supported, an incomplete list of what is not supported includes:

• borderLeftWidth
• borderTopWidth
• borderRightWidth
• borderBottomWidth
• borderTopLeftRadius
• borderTopRightRadius
• borderBottomRightRadius
• borderBottomLeftRadius

Styles

Type
Text

---

textBreakStrategy

Android

Set text break strategy on Android API Level 23+, possible values are simple, highQuality, balanced The default value is highQuality.

Type
enum('simple', 'highQuality', 'balanced')

---

underlineColorAndroid

Android

The color of the TextInput underline.

Type
color

---

value

The value to show for the text input. TextInput is a controlled component, which means the native value will be forced to match this value prop if provided. For most uses, this works great, but in some cases this may cause flickering - one common cause is preventing edits by keeping value the same. In addition to setting the same value, either set editable={false}, or set/update maxLength to prevent unwanted edits without flicker.

Type
string

---

lineBreakStrategyIOS

iOS

Set line break strategy on iOS 14+. Possible values are none, standard, hangul-word and push-out.

Type	Default
enum('none', 'standard', 'hangul-word', 'push-out')	'none'

Methods

.focus()

focus();

Makes the native input request focus.

.blur()

blur();

Makes the native input lose focus.

clear()

clear();

Removes all text from the TextInput.

---

isFocused()

isFocused(): boolean;

Returns true if the input is currently focused; false otherwise.

Known issues

• react-native#19096: Doesn't support Android's onKeyPreIme.
• react-native#19366: Calling .focus() after closing Android's keyboard via back button doesn't bring keyboard up again.
• react-native#26799: Doesn't support Android's secureTextEntry when keyboardType="email-address" or keyboardType="phone-pad".