小程序在表单填写的时候会出现闪退，代码片段如下，类似很多如下的表单，请帮忙查看闪退原因，感谢

 <View className='picker_view'>
          <Text className='picker_text'>*</Text>
          <Picker className='picker' mode='selector' range={this.state.emergencycontactChecked} onChange={this.emergencycontactOnChange}>
            <AtList>
              <AtListItem
                title='紧急联络人'
                extraText={this.state.emergencycontact}
              />
            </AtList>
          </Picker>
        </View>


        <AtInput
          required
          className='form-input'
          name='parentname'
          title='父母姓名'
          type='text'
          placeholder='请输入父母姓名'
          value={this.state.parentname}
          onChange={this.parentNameChange.bind(this)}
        />

 <AtInput
          required
          className='form-input'
          name='parentphone'
          title='父母电话'
          type='phone'
          placeholder='请输入父母电话'
          value={this.state.parentphone}
          onChange={this.parentPhoneChange.bind(this)}
        />