我的应用程序中有一个表单,我希望用户能够通过单击“下一步”返回按钮转到下一个 TextInput。
我的输入组件:
export default class Input extends Component {
focusNextField = (nextField) => {
console.log('NEXT FIELD:', nextField);
this.refs[nextField].focus();
}
render() {
var keyboardType = this.props.keyboardType || 'default';
var style = [styles.textInput, this.props.style];
if (this.props.hasError) style.push(styles.error);
return (
<View style={styles.textInputContainer}>
<TextInput
placeholder={this.props.placeholder}
onChangeText={this.props.onChangeText}
style={style}
blurOnSubmit={false}
ref={this.props.reference}
returnKeyType= {this.props.returnType}
onSubmitEditing={() => this.focusNextField(this.props.fieldRef)}
secureTextEntry={this.props.isPassword}
value={this.props.value}
keyboardType={keyboardType}
underlineColorAndroid="transparent" />
{this.props.hasError && this.props.errorMessage ? <Text style={{ color: 'red' }}>{this.props.errorMessage}</Text> : null}
</View>
);
}
}
以及它的使用方法:
<Input onChangeText={(email) => this.setState({ email })} value={this.state.email} returnType={"next"} reference={'1'} fieldRef={'2'} keyboardType="email-address" />
<Text style={{ color: '#fff', marginTop: 10, }}>Password</Text>
<Input onChangeText={(password) => this.setState({ password })} value={this.state.password} returnType={"done"}
reference={'2'} fieldRef={'2'} isPassword={true} />
但我收到错误:
undefined is not an object (evaluating _this.refs[nextField].focus)
不确定您是否仍在尝试执行此操作,但对于遇到问题的其他人,请执行以下操作:
-
将此代码添加到您的导入中(导入中的任何位置)
import { findNodeHandle } from 'react-native';
import TextInputState from 'react-native/lib/TextInputState';
export function focusTextInput(node) {
try {
TextInputState.focusTextInput(findNodeHandle(node));
} catch(e) {
console.log("Couldn't focus text input: ", e.message)
}
};
-
将以下行添加到您的构造函数中
this.focusNextField = this.focusNextField.bind(this);
this.inputs = {};
-
将以下函数添加到您的类中
focusNextField(id) {
this.inputs[id].focus();
}
-
编辑你的TextInput
如下 :
<TextInput
onSubmitEditing={() => {this.focusNextField('two');}}
ref={ input => {this.inputs['one'] = input;}}
/>
<TextInput
onSubmitEditing={() => {this.focusNextField('three');}}
ref={ input => {this.inputs['two'] = input;}}
/>
....
这是该答案的来源 https://medium.com/reactnative/tabbing-through-input-fields-ef283f923ab1
为我工作的是 0.45。
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