[英]Why does an alert in onPress of a Button crash the expo app?
此代碼有效。
<Button
onPress = {() => testfn(this.state.text)}
title = 'Send'
color = '#1DA237'
/>
function testfn(theString) {
alert(theString);
}
但是,此代碼使expo應用程序在構建時崩潰。
<Button onPress = {() => alert(this.state.text)} title = 'Send' color = '#1DA237' />
誰能為我澄清為什么?
謝謝!
編輯:
我在裝有Expo Client版本1.18.4的LG G3上運行Android 6.0
從react-native
導入警報
import {
Alert,
} from 'react-native';
然后像下面這樣調用它:
function testfn(theString){
Alert.alert(theString);
}
要么
<Button
onPress = {() => Alert.alert(this.state.text)}
title = 'Send'
color = '#1DA237'
/>
參考: https : //facebook.github.io/react-native/docs/alert.html
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