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微信小程序 taro Hooks useRef 方法获取ref无效 #5176

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HaoYongsong opened this issue Dec 24, 2019 · 7 comments
Closed

微信小程序 taro Hooks useRef 方法获取ref无效 #5176

HaoYongsong opened this issue Dec 24, 2019 · 7 comments
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@HaoYongsong
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问题描述

https://nervjs.github.io/taro/docs/hooks.html#useref

taro官方文档中关于hooks useref 方法获取ref的示例在小程序中无法获取

复现步骤

文档中的示例代码

function TextInputWithFocusButton() {
  const inputEl = useRef(null);
  const onButtonClick = () => {
    // `current` 指向已挂载到 DOM 上的文本输入元素
    inputEl.current.focus();
  };
  return (
    <View>
      <Input ref={inputEl} type="text" />
      <Button onClick={onButtonClick}>Focus the input</Button>
    </View>
  );
}

期望行为

期望 inputEl.current 指向组件

报错信息

inputEl.current 是undefined

系统信息

👽 Taro v1.3.17

Taro CLI 1.3.17 environment info:
System:
OS: macOS High Sierra 10.13.1
Shell: 5.3 - /bin/zsh
Binaries:
Node: 10.16.0 - ~/.nvm/versions/node/v10.16.0/bin/node
Yarn: 1.12.3 - /usr/local/bin/yarn
npm: 6.9.0 - ~/.nvm/versions/node/v10.16.0/bin/npm

补充信息

  • 1.3.17 1.3.29 都试验了不行
@taro-bot
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taro-bot bot commented Dec 24, 2019

CC @Chen-jj

@taro-bot
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taro-bot bot commented Dec 24, 2019

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~

@HaoYongsong
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Author

问题描述

https://nervjs.github.io/taro/docs/hooks.html#useref

taro官方文档中关于hooks useref 方法获取ref的示例在小程序中无法获取

复现步骤

文档中的示例代码

function TextInputWithFocusButton() {
  const inputEl = useRef(null);
  const onButtonClick = () => {
    // `current` 指向已挂载到 DOM 上的文本输入元素
    inputEl.current.focus();
  };
  return (
    <View>
      <Input ref={inputEl} type="text" />
      <Button onClick={onButtonClick}>Focus the input</Button>
    </View>
  );
}

期望行为

期望 inputEl.current 指向组件

报错信息

inputEl.current 是undefined

系统信息

👽 Taro v1.3.17

Taro CLI 1.3.17 environment info:
System:
OS: macOS High Sierra 10.13.1
Shell: 5.3 - /bin/zsh
Binaries:
Node: 10.16.0 - ~/.nvm/versions/node/v10.16.0/bin/node
Yarn: 1.12.3 - /usr/local/bin/yarn
npm: 6.9.0 - ~/.nvm/versions/node/v10.16.0/bin/npm

补充信息

  • 1.3.17 1.3.29 都试验了不行

@hufans
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hufans commented May 14, 2020

问题并未解决,为何关闭

@azumia
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azumia commented May 16, 2020

发现同样问题....

@zzzmj
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zzzmj commented Aug 18, 2020

我也遇到了这个问题

@ghost
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ghost commented Aug 20, 2020

我也遇到了这个问题

推荐使用回调方式。
https://zh-hans.reactjs.org/docs/hooks-faq.html#how-can-i-measure-a-dom-node

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