在React Native中如何在Alert.alert中使用foreach

Question

function openmodal(modalarray) {
  return Alert.alert(
    "Alert Title",
    "My Alert Msg",
    [
      modalarray.forEach(element => {
        "{text: element, onPress: () => console.log('button press)},";
      })
    ],
    { cancelable: false }
  );
}

Answer 1

請使用.map函數而不是.forEach 。 .forEach不返回任何值，因此您只是在數組中傳遞undefined 。

考慮以下示例

function openmodal(modalarray) {
  return Alert.alert(
    "Alert Title",
    "My Alert Msg",
    [
      ...modalarray.map(element =>
        ({text: element, onPress: () => console.log('button press')}))
    ],
    { cancelable: false }
  );
}

希望這會有所幫助！

Answer 2

嘗試：

function openmodal(modalarray) {
  return Alert.alert(
    "Alert Title",
    "My Alert Msg",
    modalarray.map(element => ({
      text: element,
      onPress: () => console.log('button press')
    })),
    { cancelable: false }
  );
}