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动态 改变 PickerView 的 默认 value 和 list 数据 的问题? #1506

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JoMartinezZhu opened this issue Dec 14, 2018 · 1 comment
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@JoMartinezZhu
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JoMartinezZhu commented Dec 14, 2018

动态 改变 PickerView 的 默认 value 和 list 数据 后,想默认选中 list 的最后一项,但是每次默认都选中了,list 的倒数第二项,也就是 上一次list的最后一项:
image

image

<View className='at-col at-col-6' style={{ borderLeft: '1rpx solid #ccc' }}>
              <PickerView style='height:40vh;'
                          indicatorStyle={selectedStyle1}
                          value={questionValue}
                          onChange={this.onChangeQuestion}
              >
                <PickerViewColumn className='question-view'>
                  {this.state.questionList.map((item, index) => {
                    return (
                      <View style={{ lineHeight: '36px' }}
                            data-index={index}
                            className={`at-row tl ${index === this.state.questionValue[0] ? 'active-row' : ''}`}
                            key={index}>
                        <View className='at-col pl13' data-index={index}>{item.name}</View>
                        <View className='at-col' data-index={index}>{item.fullScore}</View>
                      </View>
                    );
                  })}
                </PickerViewColumn>
              </PickerView>
            </View>


 let questionList = this.state.questionList;
    if (questionList[0] && questionList[0].eqno === 0) {
      questionList.shift();
    }
    this.setState({
      questionList: [...questionList, { name: curExamQuestion.name, fullScore: '' }],
      questionValue: [questionList.length],
    });

期望每次 修改 ,list 和 value 后默认选中 最后一项1
系统信息

  • 操作系统: [e.g.Mac ]
  • Taro 版本 [e.g. v.1.12]
  • Node.js 版本 [e.g. v10.14]
  • 报错平台 [weapp]
@taro-bot
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taro-bot bot commented Dec 14, 2018

欢迎提交 Issue~

如果你提交的是 bug 报告,请务必遵循 Issue 模板的规范,尽量用简洁的语言描述你的问题,最好能提供一个稳定简单的复现。🙏🙏🙏

如果你的信息提供过于模糊或不足,或者已经其他 issue 已经存在相关内容,你的 issue 有可能会被关闭。

Good luck and happy coding~

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