uni-app如何区分安卓手机和安卓pad

试一下这个看看行不行：

console.log(navigator.userAgent);  
var os = function() {  
    var ua = navigator.userAgent,  
        isWindowsPhone = /(?:Windows Phone)/.test(ua),  
        isSymbian = /(?:SymbianOS)/.test(ua) || isWindowsPhone,  
        isAndroid = /(?:Android)/.test(ua),  
        isFireFox = /(?:Firefox)/.test(ua),  
        isChrome = /(?:Chrome|CriOS)/.test(ua),  
        isTablet = /(?:iPad|PlayBook)/.test(ua) || (isAndroid && !/(?:Mobile)/.test(ua)) || (isFireFox && /(?:Tablet)/.test(ua)),  
        isPhone = /(?:iPhone)/.test(ua) && !isTablet,  
        isPc = !isPhone && !isAndroid && !isSymbian;  
    return {  
        isTablet: isTablet,  
        isPhone: isPhone,  
        isAndroid: isAndroid,  
        isPc: isPc  
    };  
}();  

if(os.isAndroid || os.isPhone) {  
    alert("手机")  
} else if(os.isTablet) {  
    alert("平板")  
} else if(os.isPc) {  
    alert("电脑")  
}

有方法了么