微信版本号大小比较

以你之姓@ 2023-01-10 01:30 186阅读 0赞

JavaScript语言貌似没有提供这种直接的API，仅有的String比较API完全不能满足这种需求。于是当然第一反应google一下，结果搜索到了不少文章，但是大多数文章中介绍的方法不是代码冗杂就是适应场景很有限，而且不少还有明显逻辑错误，于是决定自己写一个。不多说

//版本号比较
    export const versionStringCompare = (preVersion='', lastVersion='') => {
        var sources = preVersion.split('.');
        var dests = lastVersion.split('.');
        var maxL = Math.max(sources.length, dests.length);
        var result = 0;
        for (let i = 0; i < maxL; i++) {  
            let preValue = sources.length>i ? sources[i]:0;
            let preNum = isNaN(Number(preValue)) ? preValue.charCodeAt() : Number(preValue);
            let lastValue = dests.length>i ? dests[i]:0;
            let lastNum =  isNaN(Number(lastValue)) ? lastValue.charCodeAt() : Number(lastValue);
            if (preNum < lastNum) {
                result = -1;
                break;
            } else if (preNum > lastNum) { 
                result = 1;
                break;
            }
        }
        return result;
    }
    
    //使用示例：
    let result = versionStringCompare('1.0.2', '1.0');
    console.log(result);    //1
    
    let result = versionStringCompare('1.0.0', '1.1');
    console.log(result);    //-1
    
    let result = versionStringCompare('11.0.2', '5.5.6');
    console.log(result);    //1
    
    let result = versionStringCompare('5.5.0', '5.5');
    console.log(result);    //0
    
    let result = versionStringCompare('1.1.a', '1.1.1');
    console.log(result);    //1

two:

judgeNavigator() {
          // 微信版本号大于 7.0.12 开放标签才可进行 唤醒 app 跳转
          const wechatInfo = window.navigator.userAgent.match(
            /MicroMessenger\/([\d\.]+)/i
          );
          if (!wechatInfo) return;
          let judgewechat = wechatInfo[1].split(".");
          let flag = false;
          if (
            judgewechat[0] > 7 ||
            (judgewechat[0] == 7 && judgewechat[1] >= 1) ||
            (judgewechat[0] == 7 && judgewechat[1] == 0 && judgewechat[2] >= 12)
          ) {
            flag=true;
            console.log("微信环境，符合条件7.0.12",judgewechat);
          }
          // 微信内
          if (!flag) {
            // this.isV7012 = false; // 版本不支持开发标签
            Dialog.alert({ message: "请升级当前微信版本" });
          }
        },