QtQuick 技巧 5

QtQuick 技巧 5

表单提交（不包括cookies）

function urlQuery(jsonObject) {
    var query = "";var i = 0;for(var iter in jsonObject) {if(i > 0) {query += "&";}query += iter +"=" + encodeURI(jsonObject[iter]);i++;}// console.log("url query:", query);return query;
}function setHeader(xhr, headers) {
    //"Content-Type":"application/x-www-form-urlencoded"for(var iter in headers) {xhr.setRequestHeader(iter, headers[iter]);}
}function ajax(method, url, headers, data, callable) {
    headers = headers || {};callable = callable || function(xhr) {
    console.log(xhr.responseText);}var xhr = new XMLHttpRequest;xhr.onreadystatechange = function() {
    if(xhr.readyState == xhr.DONE) {callable(xhr);}}xhr.open(method, url);setHeader(xhr, headers);if("GET" === method) {xhr.send();} else {xhr.send(data);}
}

不约进保留小数精度 cutNumber

function endNotOf(str, n) {
    var index = str.length - 1;while (index > 0) {if (str[index] != n) {break;}index--;}return index;
}function toFixedNumber(number, precision) {
    precision = precision || 8;var numStr = new Number(number).toFixed(precision).toString(); // 处理科学计数法var index = endNotOf(numStr, "0") + 1;numStr = numStr.substr(0, index);if(numStr.lastIndexOf(".") == numStr.length-1) {numStr = numStr.substr(0, numStr.length-1)}return numStr;
}function numberPrecision(number) {
    number = toFixedNumber(number);var numberStr = number.toString();try {return numberStr.split(".")[1].length;} catch (e) {return 0;}
}function cutNumber(number, precision) {
    return toFixedNumber(number, precision);
}