Question

我有以下代码：

$scope.gotoBottom = function() {
  $timeout(function() {
    $location.hash('footer');
    $anchorScroll();
  }, 100);
};

我需要能够访问函数外部的Loc变量或通过GetLocation函数。因为我需要将它绑定到我正在创建的网格中，以便为非现场员工存储和关闭工作信息。

以下是使用变量Loc

的代码

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(showPosition);
    } 
    else { 
        alert('Geolocation is not supported by this browser');
    }
}
function showPosition(position) {
    alert(position.coords.latitude + ' ' + position.coords.longitude);
    var Loc = position.coords.latitude + ' ' + position.coords.longitude;
}

非常感谢任何帮助

Answer 1

可以通过两种方式实现

在函数

之外声明Loc

var Loc = '';
function showPosition(position) {
    alert(position.coords.latitude + ' ' + position.coords.longitude);
    Loc = position.coords.latitude + ' ' + position.coords.longitude;
}

或者，只需删除Loc中的'var'即可。它现在被声明为全局（http://www.w3schools.com/js/js_scope.asp）

function showPosition(position) {
    alert(position.coords.latitude + ' ' + position.coords.longitude);
    Loc = position.coords.latitude + ' ' + position.coords.longitude;
}

Answer 2

navigator.geolocation.getCurrentPosition（）正在异步模式下运行，函数showPosition（position）是用于捕获位置的回调函数。因此，您需要将所有与位置相关的代码放在此回调函数中。例如，你可以这样做：

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(whenWeGetPosition);
    } 
    else { 
        alert('Geolocation is not supported by this browser');
    }
}
function whenWeGetPosition(position) {
    // your code to use position
    var rowId=timesheetGrid.uid();
    var pos = timesheetGrid.getRowsNum();
    timesheetGrid.addRow(rowId,["","","","<?php echo $ActiveWeek; ?>","","","","","","","","","","",Loc],0); //adds a new row with pre filled data
    timesheetGrid.selectCell(rowId,0,false,true,true); // Focus on the new row  
}

getLocation();

Answer 3

var Loc = position.coords.latitude + ' ' + position.coords.longitude;

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(showPosition);
    } 
    else { 
        alert('Geolocation is not supported by this browser');
    }
}
function showPosition(position) {
    alert(position.coords.latitude + ' ' + position.coords.longitude);

}

Make it global by moving it outside the function.

在Javascript中访问变量

3 个答案: