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如何在functional组件中使用this.$preload这个API? #3603

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kuangshu opened this issue Jul 1, 2019 · 5 comments
Closed

如何在functional组件中使用this.$preload这个API? #3603

kuangshu opened this issue Jul 1, 2019 · 5 comments
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enhancement New feature or request

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@kuangshu
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kuangshu commented Jul 1, 2019

问题描述
改造了部分组件使用了函数式组件,但是有组件(如:订单组件)中有跳转逻辑中使用了this.$preload这个API,改造后报错.

复现步骤
在函数式组件中调用this.$preload

期望行为
可以传递数据到下级页面

报错信息

Cannot read property '$preload' of undefined; [Component] Event Handler Error @ pages/Order/components/OrderItem/OrderItem#(anonymous)
TypeError: Cannot read property '$preload' of undefined

系统信息

  Taro CLI 1.3.4 environment info:
    System:
      OS: Windows 10
    Binaries:
      Node: 10.4.1 - C:\Program Files\nodejs\node.EXE
      Yarn: 1.16.0 - C:\Users\leon\AppData\Roaming\npm\yarn.CMD
      npm: 6.8.0 - C:\Program Files\nodejs\npm.CMD

补充信息
如果不支持是否必须使用class?
函数式组件中是否有类似的API可以传递参数?

@taro-bot
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taro-bot bot commented Jul 1, 2019

欢迎提交 Issue~

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Good luck and happy coding~

@luckyadam
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this.$preload 暂时不能在函数式组件里使用,只能用类组件
函数式组件要像这样传递的话,只能用全局变量,或者 redux 了

@luckyadam luckyadam added the enhancement New feature or request label Jul 1, 2019
@kuangshu
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kuangshu commented Jul 2, 2019

好的.谢谢

@happyjosh
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希望添加类似usePreload的hooks,保持class组件和FC的特征一致

@Garfield550
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@happyjosh 可以新开一个 Issue 提出需求。

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