问题描述
我正在尝试为多个 TextInput 制作一个通用的 onChange 处理程序.然而,当我访问事件时,我能得到的最好的是 event.nativeEvent,它有 3 个键.
I'm trying to make a general onChange handler for multiple TextInput s.However when I access the event, the best I can get is event.nativeEvent which has 3 keys.
eventCount、目标和文本
eventCount, target, and text
目标只是一个数字.我从文档中意识到名称"不是 TextInput 的道具.有没有办法将道具传递给 TextInput,以便我稍后可以在 onChange 中获取它,然后根据它设置状态?
target is only a number. I realize from the docs that 'name' is not a prop of TextInput. Is there a way to pass in a prop to the TextInput so I can get it later in onChange and then set the state based on that?
我有 2 个这样的 TextInput
I have 2 TextInputs like this
<TextInput
name='foo'
keyboardType='numeric'
maxLength={4}
onChange={this.handleChange}
/>
<TextInput
name='bar'
maxLength={4}
onChange={this.handleChange}
/>
谢谢
这是我尝试将 id 放在 TextInput 上的尝试
Here is what I tried for putting id on TextInput
<TextInput
id='bar'
name='bar'
maxLength={4}
onChange={this.handleChange}
/>
handleChange(e) {
console.log(e.target.id);
const {name, type, text} = e.nativeEvent;
this.setState({baths: text});
}
推荐答案
或者你可以简单地做:
<TextInput
keyboardType='numeric'
maxLength={4}
onChange={e => this.handleChange(e,'foo')}
/>
<TextInput
name='bar'
maxLength={4}
onChange={e => this.handleChange(e,'bar')}
/>
然后在 ts 文件中
handleChange(event,name){
// whatever
}
如果您担心性能,可以使用数据集.data-
前面的任何属性都添加到 target.dataset
对象中.
If you are worried about performance, you can use datasets. Any attribute prepended by data-
are added to target.dataset
object.
<TextInput
data-name='foo'
keyboardType='numeric'
maxLength={4}
onChange={this.handleChange}
/>
<TextInput
data-name='bar'
maxLength={4}
onChange={this.handleChange}
/>
然后在 ts 文件中
handleChange(event){
const {name} = event.target.dataset
// whatever
}
这篇关于React Native 在 OnChange 中获取 TextInput 的名称的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!