modified: pages/basketballGym/index.js

modified:   pages/basketballGym/index.wxml
modified:   pages/currentEnter/index.wxml
modified:   pages/loginIndex/index.js
modified:   pages/loginIndex/index.wxml
modified:   pages/loginIndex/index.wxss
modified:   pages/myEnters/index.wxml
modified:   utils/api.js
modified:   utils/util.js

utils/util.js

@@ -52,9 +52,22 @@ const getTimeoutStorage = (key) => {
   return value;
 }
 
+// 计算两点之间的距离（返回米）
+const getDistance = (lat1, lng1, lat2, lng2) => {
+  const radLat1 = lat1 * Math.PI / 180.0;
+  const radLat2 = lat2 * Math.PI / 180.0;
+  const a = radLat1 - radLat2;
+  const b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0;
+  let s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
+  s = s * 6378.137; // 地球半径，千米
+  s = Math.round(s * 10000) / 10; // 换算成米
+  return s;
+}
+
 module.exports = {
   formatTime: formatTime,
   getCurrentPageUrl: getCurrentPageUrl,
   setTimeOutStorage: setTimeOutStorage,
-  getTimeoutStorage: getTimeoutStorage
+  getTimeoutStorage: getTimeoutStorage,
+  getDistance: getDistance
 }