從Google API返回經度和緯度並傳遞到陣列

Question

我只是想返回經度和緯度，並將它們推到空的經度和緯度陣列。我的問題是，當我提醒（拉特[0]），它出現未定義，我希望能夠訪問這些值，而不是隻使用回調函數中的警報。有沒有辦法解決。任何幫助是極大的讚賞！

var lat=[]; 
var lon=[]; 
var geocoder = new google.maps.Geocoder(); 
geocoder.geocode({ 'address': 'miami, us'}, function(results, status) { 
     if (status == google.maps.GeocoderStatus.OK) { 
     lat.push(results[0].geometry.location.lat()); 
     lon.push(results[0].geometry.location.lng()); 
     } else { 
     alert("Something got wrong " + status); 
     } 
    }); 
alert(lat[0]); 
alert(lon[0]); 

Answer 1

我最終自己解決了這個問題。我的解決方案採用城市列表並通過API調用對其進行地理編碼。當最後一次調用被帶回時，一個稱爲主運行的回調函數。 Main函數是您可以訪問已填充的lats和lons數組的地方。

//Here is an array of locations to be geocoded 
var locations1 = []; 
locations1.push("Horsham, PA"); 
locations1.push("Dallas, TX"); 
locations1.push("Chicago, IL"); 
locations1.push("Denver, CO"); 
locations1.push("San Diego, CA"); 

// Create an array to store the latitudes and longitudes 
var lat1=[]; 
var lon1=[]; 

//create time parameter to delay each call, limited number of calls per 
//second 
var time=0; 

//loop through each location and call the geo function 
for (var i = 0; i < locations1.length; i++) { 
    geo(locations1[i],time); 
    time=time+1; 
} 

// inputs a location and time parameter then adds the lat/lon to array 
function geo(loc,t){ 

    var geocoder = new google.maps.Geocoder(); 
    setTimeout(function(){ 
    geocoder.geocode({ 
     'address': loc 
    }, function(results, status) { 
     if (status == google.maps.GeocoderStatus.OK) { 
     lat1.push(results[0].geometry.location.lat()); 
        lon1.push(results[0].geometry.location.lng()); 

     } else { 
     alert("Something got wrong " + status+ " problem with: "+ loc); 
     } 
     // When your array is full run main, this is where you can do 
//things with the array 
     if(lat1.length==locations1.length){ 
     main(); 

     } 

    }); 
    },t*1000); 
} 

function main(){ 
    for(var j=0;j<lat1.length;j++){ 
    alert(locations1[j]+" has latitude of "+lat1[j]+", and longitude of 
    "+lon1[j]); 
    // do what ever else you want to do with the populated array 
    } 
} 

這裏是擁有所有的代碼小提琴：

http://jsfiddle.net/sharder14/afkzv2fx/

Answer 2

@AndrewEvt是對的。只需在您發佈的代碼的最後兩行之前添加此代碼： ... geocoder（）; //這會調用您的地址解析器函數
alert（lat [0]）;
alert（long [0]）;