如何在Alert函数上调用onPress中的方法[React-Native] [英] How can I call method from onPress on Alert function [React-Native]

问题描述

<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>

---

警报对话框上的OK按钮
我需要致电

---

After OK button on Alert Dialog I need to call

onDeleteBTN = () => {
    alert(' OnDelete');
}

---

---

{text: 'OK', onPress: () => {this.onDeleteBTN.bind(this)}},
{text: 'OK', onPress: () => {this.onDeleteBTN}},

---

它不起作用

推荐答案

第一期， Button 组件有一个 title prop，而不是< Text> as一个孩子。第二个问题是你有一堆语法错误，并没有正确调用函数（或绑定）。如果你修复它，那它应该工作正常;例如：

First issue, the Button component has a title prop 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:

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>
  );
}

注意：

• 我不知道你的 alert（）函数应该做什么，所以我做了一个假的记录到控制台。


• 还有其他方法可以调用 onDeleteBTN（）或绑定。

• 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.

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