如何在React-Native中从选择器中获取多个值？

Question

这是我的反应本机选择器的代码。我想获取所选 json 数组的所有值。

我想提供多项选择。

<Picker
                  mode="dropdown"
                  style={styles.droplist}
                  selectedValue={this.state.mode}
                  onValueChange={this.funcValueChanged}>
                  <Picker.Item label="Select Company" value="Select Company" />
                  {
                    this.state.data.map((item, key) => (
                      <Picker.Item
                        label={item.Co_Name + ' (' + item.CompCode + ')'}
                        value={key}
                        key={key}
                      />
                    )))
                  }
                </Picker>

Answer 1

您可以用于单选/多选

从“react-native-dropdown-picker”导入 DropDownPicker；

         <DropDownPicker
            items={getAllStates}
            searchable={true}
            searchablePlaceholder="Search for an item"
            searchablePlaceholderTextColor="gray"
            placeholder="Select States"
            placeholderTextColor={"grey"}
            multiple={true}
            multipleText="%d items have been selected."
            containerStyle={{ marginTop: 8, marginBottom: 8, width: 
            "92%", alignSelf: "center", }}
            onChangeItem={item => {

            }
            } />