如何在涉及setTimeout的循环完成后显示消息？

Question

我正在使用google地理编码api来循环和地理编码22个邮编列表并将它们存储到数据库中。我希望在地理编码完成时显示一条消息，但是由于我必须使用setTimeout来避免在11个邮政编码处遇到“OVER_QUERY_LIMIT”错误，所以我的邮件比实际需要的邮件出现速度要快得多。我该如何解决这个问题？

JS

   function geocodeAddress (postcode) { 
        geocoder.geocode({'address': postcode}, function(results, status) { 

         if (status === 'OK') { 
          var x, 
           resultsLength = results.length; 

          for(x = 0; x < resultsLength; x++) { 
           lat = results[x].geometry.location.lat().toFixed(8); 
           lng = results[x].geometry.location.lng().toFixed(8); 
           //send values to php file 
           sendLatLng(lat, lng); 
          } 
         } 
         else if (status == 'OVER_QUERY_LIMIT') { 
          //call function again after delay when error is encountered 
          setTimeout(function() { 
           geocodeAddress(postcode); 
          }, 200); 
         } 
         else { 
          console.log('Geocode was not successful: ' + status); 
         } 
        }); 
       }; 

       for (n = 0; n < pstcodeLength; n++) { 
        geocodeAddress(postcodes[n]); 
        //display message after loop is complete 
        if (n === pstcodeLength-1) { 
         console.log('geocoding is complete'); 
        } 
       } 

Answer 1

只是不停的轨道，完成的数量。当你得到最大值时，比显示消息。

var cnt = 0; 

function geocodeAddress(postcode) { 
    geocoder.geocode({ 
    'address': postcode 
    }, function(results, status) { 

    if (status === 'OK') { 
     var x, 
     resultsLength = results.length; 

     for (x = 0; x < resultsLength; x++) { 
     lat = results[x].geometry.location.lat().toFixed(8); 
     lng = results[x].geometry.location.lng().toFixed(8); 
     //send values to php file 
     sendLatLng(lat, lng); 
     } 
     cnt++; 
    } else if (status == 'OVER_QUERY_LIMIT') { 
     //call function again after delay when error is encountered 
     setTimeout(function() { 
     geocodeAddress(postcode); 
     }, 200); 
    } else { 
     cnt++; 
     console.log('Geocode was not successful: ' + status); 
    } 

    if (cnt === pstcodeLength) { 
     console.log('geocoding is complete'); 
    } 
    }); 
};