【发布时间】:2020-05-06 09:42:36
【问题描述】:
我有一个带有简单 FlatList 和 TextInput 的本机应用程序。 当我搜索任何文本时,它会在列表中突出显示,如下所示:
现在我设置“numberOfLines = 3”(根据我们的要求),现在看起来像这样:
要求它看起来像下面这样。 (请不要介意我的 WhatsApp 截图)它在这 3 行中用“...”显示突出显示的文本。
我正在使用以下代码显示数据
<Text numberOfLines={3} style={[subTitle,{fontSize:normalizeFontSize(14),lineHeight:normalizeLineHeight(14)}]}>
{getHighlightedText(alert)}
</Text>
高亮功能:
getHighlightedText = text => {
//search text user inputs
const {value} = this.props;
if (value == "" || value == null || value == 0) {
return <Text> {text} </Text>
} else {
// split the search value
const words = value.split(/\s+/g).filter(word => word.length);
// join if search value has more than 1 word
const pattern = words.join('|');
const re = new RegExp(pattern, 'gi')
const children = [];
let before, highlighted, match, pos = 0;
// match using RegExp with my text
const matches = text.match(re);
if (matches != null) {
// loop all the matches
for (match of matches) {
match = re.exec(text)
if (pos < match.index) {
// before has all the text before the word that has to highlighted
before = text.substring(pos, match.index);
if (before.length) {
children.push(before)
}
}
highlighted = <Text style={{backgroundColor: 'coral'}}>{match[0]} </Text>
// text is highlighted
children.push(highlighted);
pos = match.index + match[0].length;
}
}
if (pos < text.length) {
// text after the highlighted part
const last = text.substring(pos);
children.push(last);
}
// children array will have the entire text
return <Text>{children} </Text>
}
}
在这方面需要 React Native 专家的帮助。请善待我是 React Native 的新手 :)
【问题讨论】:
标签: javascript reactjs react-native search react-native-flatlist