I have a <TextInput/> react native component here. When I begin typing in it, I see the predictions box above the keyboard. I don't want this to show up, how can I get rid of this?
https://facebook.github.io/react-native/docs/textinput.html
<TextInput
placeholder="email"
autoCapitalize="none"
keyboardType="email-address"
placeholderTextColor="white"
style={styles.input}
onChangeText={email => this.setState({ email })}
value={this.state.email}
/>
Try Using <TextInput autoCorrect={false} /> for disabling suggestions.
Related
I am having the next trouble, I have the next textinput
<TextInput
style={styles.inputs}
placeholder="Nombre"
placeholderTextColor={theme.SECONDARY_TEXT_COLOR}
underlineColorAndroid="transparent"
autoCorrect={false}
autoCompleteType="off"
autoCapitalize="characters"
onBlur={(() => setvName(values.fName), handleBlur('fName'))}
value={values.fName}
/>
as you can see i have 2 functions on onblur, the thing is that it works great when i dont have handleBlur('fName') on it, but i need both of them for my formik validation, how can i make it work?
Use like this to call multiple function.
onBlur={() => {
setvName(values.fName);
handleBlur('fName');
}}
how can I set a default checked radiobutton in react native? I'm trying to have a radio button already activated when the user enters the screen. Thanks for your help. II lready read that I have to use the value prop, but I do not now where to place it correctly, so that its working.
render(){
return (
<form>
<View>
<label>
<input
type="radio"
name="category"
value="anfaenger"
checked={this.state.selectedOption === "anfaenger"}
onChange={this.onValueChange}
/>
Anfänger
</label>
</View>
<View style={{marginTop:10}}>
<label>
<input
type="radio"
name="category"
value="geuebt"
checked={this.state.selectedOption === "geuebt"}
onChange={this.onValueChange}
/>
Geübt
</label>
</View>
<View style={{marginTop:10}}>
<label>
<input
type="radio"
name="category"
value="eingeschraenkt"
checked={this.state.selectedOption === "eingeschraenkt"}
onChange={this.onValueChange}
/>
Eingeschränkt
</label>
</View>
</form>
</View>
<View style={{magrinTop:'40'}}>
<button className="btn btn-default" type="submit">
Sichere Auswahl
</button>
<Button title="Erstelle meinen Plan" onPress={() => this.props.navigation.navigate('Uebungen', {
category: this.state.selectedOption,
}) }/>
</View>
</ScrollView>
</View>
);
}
}
You can pass a defaultChecked prop to a radio button component like so
export default function App() {
return (
<form>
<View>
<label>
<input
type="radio"
name="category"
value="anfaenger"
onChange={this.onValueChange}
defaultChecked
/>
Anfanger
</label>
</View>
<View style={{ marginTop: 10 }}>
<label>
<input
type="radio"
name="category"
value="geuebt"
onChange={this.onValueChange}
/>
Geubt
</label>
</View>
<View style={{ marginTop: 10 }}>
<label>
<input
type="radio"
name="category"
value="eingeschraenkt"
onChange={this.onValueChange}
/>
Eingeschrnkt
</label>
</View>
</form>
);
}
The value prop is passed on to the next page when the form is submitted. So if the first option is selected, 'anfaenger' will appear in the form results.
Edit:
You're right, the defaultChecked prop is only compatible with Web devices, not iOS and Android devices. When running on iOS and Android, I also noticed that some of the tags you used aren't compatible with React-Native, such as <forms>, <input>, <label>, unless there is a library that supports this. However, I wasn't able to find a library where you could import these components from.
Here is an Expo Snack I made that holds some code for radio buttons (styling need a bit of work, but maybe you can find a better UI library other than react-native-paper).
Basically, I set my React Hook's initial state to the first option in the form. This means that when the user opens the form, the first option should always be checked, since that is the state of the Hook.
If in fact your code does work as originally posted, I'd recommend setting your components selectedOption state variable to one of the options in the form.
state = {
selectedOption: 'anfaenger', // or 'geuebt' or 'eingeschraenkt' or any value you want to be the default
}
That way, when it checks for the state being a value in the radio button's status, it will be met and marked. However, if you need selectedOption to initialize to some value other than those in the radio buttons, then you can do boolean logic like so:
(Assuming selectedOption initializes to '' a.k.a empty string):
checked={this.state.selectedOption === "" || this.state.selectedOption === "anfaenger"}
I'm working on an app which the users will enter large number of records continously. App functionalities are completed but the performance is bit slow in low end mobiles. As i'm new to react native i've not much idea on this. But when i googled reagrding this issue it has been noticed that when the state changes the whole app get rerenders. So for reducing the state changes i want to know how to use TextInput without using state . Because in my TextInput by using onChangeText the state is updating in every keypress.
This is a demo snack of the project Demo
<View style={styles.fixedform}>
<View style={styles.textinputViewleft}>
<TextInput
style={styles.textinput}
ref={firstref}
label="Digit"
returnKeyType="next"
value={digit.value}
onChangeText={(text) => { setDigit({ value: text, error: '' }); if (text.length === 3) { ref.current.focus(); } }}
error={!!digit.error}
errorText={digit.error}
keyboardType="numeric"
maxLength={3}
minLength={3}/>
</View>
<View style={styles.textinputView}>
<TextInput
style={styles.textinput}
ref={ref}
label="Count"
value={count.value}
onChangeText={(text) => setCount({ value: text, error: '' })}
error={!!count.error}
errorText={count.error}
keyboardType="numeric"
maxLength={3}/>
</View>
<View style={styles.textinputView}>
<Button loading={loading} disabled={disabled} style={styles.buttonView} mode="contained" onPress={onSubmitPress}>Submit</Button>
</View>
</View>
Try this way, It will not rerender on text change and hold the value on key press like
<TextInput
...
value={digit.value} // remove this
onChangeText={(text) => digit.value = text };
...
/>
To clear value, try one of this
1- firstref.current.clear();
2- firstref.current.setNativeProps({ text: '' });
3- firstref.current.value = '';
Can Any One Help Me with This Problem Actually I Am New To React Native I have tried a couple of ways to overcome this problem but nothing worked out please help me with this I don't want the keyboard to interfere with the overlay
<View style={{height:"9%"}}>
<Button title="Add A New ToDO" onPress={this.onPressOpenOverLay} buttonStyle={{height:"100%",borderBottomLeftRadius:30,borderBottomRightRadius:30}}/>
<Overlay isVisible={this.state.setVisible}
onBackdropPress={this.onPressCloseOverLay}
animationType="fade"
overlayStyle={{height:"70%",width:"90%",borderRadius:20,alignItems:"center",paddingTop:"15%"}}>
<Text style={{fontSize:19,color:"#0288D1",fontWeight:"bold"}}>Add A New ToDo</Text>
<TextInput style={styles.input}
placeholder="Email ID"
autoCapitalize="none"
underlineColorAndroid="transparent"
onChangeText={email => this.setState({ email })}
value={this.state.email}
>
</TextInput>
</Overlay>
</View>
<FlatList
style={{marginTop:"2%"}}
data={this.state.data}
renderItem={this._renderMyList}
keyExtractor={(item, index) => index.toString()}
bounces={true}
/>
</SafeAreaView>
)
}
}
If you set your width or height with percentage, then it is prone to change when some changes in UI layout like a keyboard appearing happens. so you need to give them pixel values.
Moreover, you could use the import {Dimension} from 'react-native' to give you the width and height of the device and then calculate the percentage of those values and give them to your view.
I want to autofocus first redux field. I have tried many different options available but none of them worked. So whenever the form gets created, it should focus to first field.
<Field
name={'Email'}
label="Email *"
onFocusCb={this.hideDoneButton}
component={FormInput}
containerStyle={styles.inputStyle}
clearButtonMode={'always'}
autoCorrect={false}
/>
I have created the component{FormInput} outside the class. Below is the code for the same.
const FormInput = props =>
(<View style={props.containerStyle}>
<FormTextInput
autoFocus={true}
multiline
style={props.style}
autoCapitalize={props.autoCapitalize}
clearButtonMode={props.clearButtonMode}
selectionColor={props.selectionColor}
value={props.input.value}
onFocus={props.onFocusCb}
keyboardType={props.keyboardType}
label={props.label}
placeholder={props.placeholder}
defaultValue={props.defaultValue}
onChangeText={text => props.input.onChange(text)}
onEndEditing={() => {
if (props.onEndEditing) {
props.onEndEditing();
}
if (props.input.onEndEditing) {
props.input.onEndEditing();
}
}}
/>
</View>);
You could use the HTML5 attribute autoFocus. This solution is not related to Redux form.
<Field
autoFocus
name={'Email'}
label="Email *"
onFocusCb={this.hideDoneButton}
component={FormInput}
containerStyle={styles.inputStyle}
clearButtonMode={'always'}
autoCorrect={false}
/>
There are ways to do it within Redux-form, like setting the props ref, withRef, use getRenderedComponent() and then calling .focus(), but for this simple behavior it's not clear what the benefit, over just using autoFocus, would be.