React Native When I input TextInput, the input text is not displayed. This is an accidental situation. How can I solve this problem?
<TextInput
style={styles.text_input}
placeholder={'请填写注册时的手机号'}
underlineColorAndroid='transparent'
returnKeyType ='done'
onChangeText={(text)=> {
this.setState({
phoneNumber: text
});
}}
/>
text_input: {
fontSize: 14,
height: 40,
color:Colors.FontBlackColor
}
Question screenshot
Looks like you're missing the value prop.
<TextInput
onChangeText={(text)=> {
this.setState({
phoneNumber: text
});
}}
value={this.state.phoneNumber} // Add this prop
/>
You have to give TextInput the value prop:
<TextInput value={"string"} placeholder='textinput' />
Related
I search it every day why it doesn't work properly.When I type anything onto TextInput's placeholder it starts with empty space.I want to start without space.I also tried trim() method.It wasn't helpful.How should I fix my error? Thanks in advance!
<TextInput value={this.state.key} onChangeText={(text) =>{this.setState({key:text.trim()}) ; console.warn('key: '+this.state.key)}}/>
Try this :
<TextInput
value={this.state.key}
keyboardType="default"
onChangeText={key => this.setState({ key })}
/>;
UPDATED ANSWER :
_replaceSpace(str) {
return str.replace(/\u0020/, '\u00a0')
}
<TextInput
style={{ textAlign: "right" }}
value={this._replaceSpace(this.state.text)}
onChangeText={text => this.setState({ text: text })}
/>;
This is the text input that I am using, I want the input field to be disabled after entering a value.I tried using editable props, but it did not help.
I am completely new to react native, please help with an example.
<View style={editProfileStyle.textinputView}>
<TextInput
style={editProfileStyle.textInput}
placeholder="Enter your Specialization"
value={this.state.subQualification}
onChangeText={subQualification => this.setState({ subQualification: subQualification })}
/>
</View>
As per the question, since the field should get disabled when it has some value:
<View style={editProfileStyle.textinputView}>
<TextInput
editable={this.state.subQualification.length === 0}
style={editProfileStyle.textInput}
placeholder="Enter your Specialization"
value={this.state.subQualification}
onChangeText={subQualification => this.setState({ subQualification: subQualification })}
/>
</View>
using check in your editable prop of
editable={this.state.subQualification.length === 0} will make field editable when nothing in present in the field
Try to add state and modify your textInput props like this:
state ={
textDisable: true
}
render() {
return (
<View style={editProfileStyle.textinputView}>
<TextInput
style={editProfileStyle.textInput}
placeholder="Enter your Specialization"
value={this.state.subQualification}
onChangeText={subQualification => this.setState({ subQualification: subQualification })}
editable={this.state.textDisable}
onEndEditing={() => this.setState({textDisable: false})}
/>
</View>
);
}
}
after onsubmit the input should be disable.
I'm using TextInput to allow only numbers using state, it works on android but not on iOS. Here's how I'm using state to allow only numbers.
handleInputChange = (text) => {
if (/^\d+$/.test(text) || text === '') {
this.setState({
text: text
});
}
}
my render method
render = () => {
return (
<View style={{
flex: 0,
flexDirection: 'row',
alignItems: 'flex-end',
marginTop: 50
}}>
<View style={{ flex: 0, marginLeft: 10 }}>
<Text style={{ fontSize: 20}}>$</Text>
</View>
<View style={{flex: 1,}}>
<TextInput
onChangeText={this.handleInputChange}
value={this.state.text}
underlineColorAndroid='transparent'
autoCorrect={false}
spellCheck={false}
style={{ paddingLeft: 5, fontSize: 20 }} />
</View>
</View>
);
}
This only works in Android, I guess because the state has changed react doesn't update the ui.
pls try this:
keyboardType='numeric' in the tag TextInput
when you prove don't put the numbers with the keyboard of your pc, pls use the keyboard of the emulator
if still not working put this textContentType='telephoneNumber'
As Ravi Rupareliya said this's a bug, which TextInput doesn't update, when the state text is shorter than the current TextInput value. Seems like the bug has been fixed in react-native 0.57.RC. For now I'm using the following fix.
handleInputChange = (text) => {
const filteredText = text.replace(/\D/gm, '');
if(filteredText !== text) {
// set state text to the current TextInput value, to trigger
// TextInput update.
this.setState({ text: text });
// buys us some time until the above setState finish execution
setTimeout(() => {
this.setState((previousState) => {
return {
...previousState,
text: previousState.text.replace(/\D/gm, '')
};
});
}, 0);
} else {
this.setState({ text: filteredText });
}
}
React native not provided keyboardType which remove punctuation from keyboard. You need to use regular expression with replace method to remove punctuation from text and set keyboardType = 'numeric'.
Regular Expression
/[- #*;,.<>{}[]/]/gi
Example code
onTextChanged(value) {
// code to remove non-numeric characters from text
this.setState({ number: value.replace(/[- #*;,.<>\{\}\[\]\\\/]/gi, '') });
}
Please check snack link
https://snack.expo.io/#vishal7008/1e004c
Worked for me:
<TextInput
...
textContentType='telephoneNumber'
dataDetectorTypes='phoneNumber'
keyboardType='phone-pad'
/>
While having input from user you can change the keyBoard type for that particular text input box like this i.e. numeric or alphabatic etc...
<TextInput>
//contains some code
keyboardType="Numeric"
</TextInput>
<TextInput>
keyboardType="number-pad"
</TextInput>
onChangeText={value => setuserPrimaryPhone(value.replace(/[^0-9]/g, ''))}
javascript simple method replace(/[^0-9]/g, ''))}
I'm using react native text field component how can i remove bottom underline in textfield
this is my code
i followed this link: https://github.com/n4kz/react-native-material-textfield
constructor(props) {
super(props);
this.state = {
userName:'',
password:''
}
}
componentWillMount() {
}
componentDidMount(){
}
render() {
//let { userName } = this.state;
let { password } = this.state;
return (
<View style={{flex:1,justifyContent:'center'}}>
<View style={{flex:0.2,justifyContent:'center',flexDirection:'row'}}>
<View style={{flex:12}}></View>
<View style={{flex:76,borderWidth:1,borderColor:'black',borderRadius:5,marginBottom:13.7}}>
<TextField style={{ color: 'black',borderColor:'transparent'}}
label='Phone number'
textColor={'black'}
value={this.state.userName}
labelHeight={40}
labelPadding={8}
padding={10}
Bottom padding= {10}
Top padding={4}
//width={50}
//borderColor={'black'}
// textFocusColor={'orange'}
//underlineColorAndroid='transparent'
baseColor={"black"}
labelHeight={32}
blurOnSubmit={true}
//characterRestriction={10}
onChangeText={(data) => this.setState({ userName: data })}
/>
</View>
)
}
You can try underlineColorAndroid='rgba(0,0,0,0)'
Hope it helps
Other TextInput properties will also work
Ref: https://github.com/n4kz/react-native-material-textfield
React native material text field component (<TextField />) can also use all of the properties from text input component (<TextInput />). So, you can remove the underline border using underlineColorAndroid props. Set this prop to be transparent.
<TextField underlineColorAndroid="transparent" />
Try this: lineWidth={0} if you want to hide the default underline and if you want to hide the line after which appears after click try this: activeLineWidth={0}.
Fine, after using this library I end up with this solution:
You can use one of the props of react-native-material-textfield activeLineWidth with 0 as an argument.
underlineColor="transparent"
I have to change the font family for textInput's Placeholder text. If we add this secureTextEntry={true}, the mentioned font Family is set for placeholder text.
<TextInput style={styles.textboxfield} secureTextEntry={true} placeholder="Password" />
But if we remove this secureTextEntry={true}, we can't set font-family for placeholder
<TextInput style={styles.textboxfield} placeholder="Password" />
Style is : textboxfieldd: {
height: 39,
backgroundColor: '#ffffff',
marginBottom:0,
fontFamily:'Inconsolata-Regular',
},
How can I change the font family for placeholder text ?
The way I solved this was to conditionally style the fontFamily (or style) on the presence or absence of the value i.e.
<TextInput
style={{ fontFamily: value ? 'OpenSans-Regular' : 'OpenSans-Italic' }}
value={value}
onChangeText={onChange}
/>
This way the font family is italic for the placeholder (when value === '') and regular when text is shown.
Above is not tested as I was using styled components but concept should be the same. Also this only works if TextInput is rendered as a controlled component so you have access to value.
Try this :
<TextInput
secureTextEntry={(this.state.email.length <= 0 && this.state.emailStatus != 'onFocus') ? true : false}
style={styles.textboxfieldd}
placeholderStyle={styles.textboxfieldd}
onFocus={this.changeStatus.bind(this, 'emailStatus', 'onFocus', '')}
onChangeText={(email) => this.setState({ email })}
value={this.state.email}
placeholder={this.state.emailStatusPH}
placeholderTextColor="#D8D8D8" />
Exactly this line => secureTextEntry={(this.state.email.length<=0 && this.state.emailStatus!='onFocus') ?true:false} solves the problem .
Because if we give secureTextEntry={true} means fontfamily is set to placeholder text but field changed as password , so for that only we wrote like this . secureTextEntry={(this.state.email.length<=0 && this.state.emailStatus!='onFocus') ?true:false}
If that field length is 0 and not focused means it will set true secureTextEntry={true} so the placeholder text is set to mentioned fontfamily
Textinput can have a Text child.
So you can have
<TextInput>
<Text style = {value.length == 0? styles.hint : styles.input}>
{value.length == 0? hint : value}
</Text>
</TextInput>
You can handle this by length of your password like :
<TextInput
secureTextEntry={this.state.password.length === 0? false : true}
/>
If you want to change the font once, you can just set fontFamily: yourFontFamilyName
If you plan on using your font in many place I suggest you create a class that will use the same fontFamily everyTime :
You can do it this way : (example with Quicksand as font-family)
import React, {TextInput} from 'react-native';
import _ from 'lodash';
var OldTextInput = TextInput;
class NewTextInput extends OldTextInput {
defaultProps = {};
render() {
var props = _.clone(this.props);
if (_.isArray(this.props.style)){
props.style.push({fontFamily: 'Quicksand-Regular'});
} else if (props.style) {
props.style = [props.style, {fontFamily: 'Quicksand-Regular'}];
} else {
props.style = {fontFamily: 'Quicksand-Regular'};
}
this.props = props;
return super.render();
};
}
export default NewTextInput;
and then use TextInput by requiring it in every file (import TextInput from './TextInput')
You're likely experiencing this on Android with React Native <= 0.64. In which case here's a solution:
<TextInput ref={ref => ref && ref.setNativeProps({ style: { fontFamily: 'FONT_NAME' } })} />
For more information and alternatives that might work better for you look at this issue thread on Github
Add fontSize={20}
<TextInput style={styles.textboxfield} secureTextEntry={true} placeholder="Password" fontSize={20}
/>
its worked for me
fontWeight: 'normal',
good luck :)