HarmonyOS 鸿蒙Next怎么进行格式校验
HarmonyOS 鸿蒙Next怎么进行格式校验
现有一个string类型的变量
我要判断这个变量里面的值是否时number类型
类似于
let num1: string = ’12345‘
let num2: string = ‘12345abc’
如何进行数字校验
4 回复
官方有相关的api来进行判断，导入国际化能力 @ohos.i18n
import I18n from '@ohos.i18n';
//判断字符串char是否是数字
let isdigit: boolean = I18n.Unicode.isDigit(“1”); // isdigit = true
//判断字符串char是否是字母
let isletter: boolean = I18n.Unicode.isLetter(“a”); // isletter = true
<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>
[@Entry](/user/Entry)
[@Component](/user/Component)
struct Page34 {
isNumeric(str: string): boolean {
// 正则表达式，匹配所有的数字字符
const regex = /^\d+$/;
<span class="hljs-comment"><span class="hljs-comment">// 使用正则表达式的test方法来检测字符串</span></span>
<span class="hljs-keyword"><span class="hljs-keyword">return</span></span> regex.test(str.trim());
}
build() {
Column() {
Button(‘测试’).onClick(() => {
let num1: string = ’ 12345 ’
let num2: string = ‘12345abc’
console.info(`${num1} isNumber ${<span class="hljs-keyword"><span class="hljs-keyword">this</span></span>.isNumeric(num1)}`)
console.info(`${num2} isNumber ${<span class="hljs-keyword"><span class="hljs-keyword">this</span></span>.isNumeric(num2)}`)
})
}
.height(<span class="hljs-string"><span class="hljs-string">'100%'</span></span>)
.width(<span class="hljs-string"><span class="hljs-string">'100%'</span></span>)
}
}
<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>打印
12345 isNumber true
12345abc isNumber false<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>
