Javascript 如何从 onPress 调用方法 on Alert 功能 [React-Native]
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How can I call method from onPress on Alert function [React-Native]
提问by boy_v
How can I call method from onPress on Alert function [React-Native]
如何从 onPress 调用方法 on Alert 功能 [React-Native]
<Button
onPress={{() => Alert.alert(
'Alert Title',
'alertMessage',
[
{text: 'Cancel', onPress: () => console.log('Cancel Pressed!')},
{text: 'OK', onPress: () => {this.onDeleteBTN}},
],
{ cancelable: false }
)}}
>
<Text> Delete Record </Text>
</Button>
After OK button on Alert Dialog I need to call
在 Alert Dialog 上的 OK 按钮之后，我需要调用
onDeleteBTN = () => {
alert(' OnDelete');
}
{text: 'OK', onPress: () => {this.onDeleteBTN.bind(this)}},
{text: 'OK', onPress: () => {this.onDeleteBTN}},
It's not work
这不工作
回答by Michael Cheng
First issue, the Buttoncomponent has a titleprop instead of having <Text>as a child. Second issue is that you have a bunch of syntax errors and are not calling functions (or binding) correctly. If you fix that, then it should work fine; for example:
第一个问题，Button组件有一个titleprop 而不是<Text>作为一个孩子。第二个问题是你有一堆语法错误并且没有正确调用函数（或绑定）。如果你解决了这个问题，那么它应该可以正常工作；例如：
alert = (msg) => {
console.log(msg)
}
onDeleteBTN = () => {
this.alert(' OnDelete')
}
render() {
return (
<View style={styles.container}>
<Button
title="Delete Record"
onPress={() => Alert.alert(
'Alert Title',
'alertMessage',
[
{text: 'Cancel', onPress: () => console.log('Cancel Pressed!')},
{text: 'OK', onPress: this.onDeleteBTN},
],
{ cancelable: false }
)}
/>
</View>
);
}
Note:
笔记：
- I don't know what your
alert()function is supposed to do, so I made a dummy one that logs to console. - There are other ways of doing this like calling
onDeleteBTN()or binding.
- 我不知道你的
alert()函数应该做什么，所以我做了一个虚拟的，记录到控制台。 - 还有其他方法可以做到这一点，例如调用
onDeleteBTN()或绑定。
