@td-design/react-native-picker/lib/module/usePicker.js

基于 @td-design/react-native 的 picker 组件

import { useRef } from 'react';
import { Keyboard } from 'react-native';
import { useMemoizedFn, useSafeState } from '@td-design/rn-hooks';
import { transformValueToLabel } from './utils';
function getText(data, value, cascade, placeholder, hyphen) {
  if (value) {
    return transformValueToLabel(data, value, cascade, hyphen) || placeholder;
  }
  return placeholder;
}
export default function usePicker(_ref) {
  let {
    data,
    cascade = false,
    value,
    onChange,
    placeholder = '请选择',
    hyphen
  } = _ref;
  const pickerRef = useRef(null);
  const [state, setState] = useSafeState(value);
  const currentText = getText(data, state, cascade, placeholder, hyphen);
  const handlePress = () => {
    var _pickerRef$current;
    Keyboard.dismiss();
    (_pickerRef$current = pickerRef.current) === null || _pickerRef$current === void 0 ? void 0 : _pickerRef$current.show();
  };
  const handleChange = value => {
    setState(value);
    if (cascade) {
      onChange === null || onChange === void 0 ? void 0 : onChange(value);
    } else {
      onChange === null || onChange === void 0 ? void 0 : onChange(value);
    }
  };
  const handleInputClear = () => {
    setState(undefined);
    onChange === null || onChange === void 0 ? void 0 : onChange(undefined);
  };
  return {
    state,
    currentText,
    pickerRef,
    handlePress: useMemoizedFn(handlePress),
    handleChange: useMemoizedFn(handleChange),
    handleInputClear: useMemoizedFn(handleInputClear)
  };
}
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