新增网络是否连接判断方法

@@ -36,4 +36,16 @@ export class NetworkUtil {
         return NetworkUtil.TYPE_NONE;
     }
   }
+
+  /**
+   * 判断网络是否已连接
+   * @returns
+   */
+  static isNetConnected(): boolean {
+    let type = NetworkManager.getInstance().getNetType()
+    if (type == NetworkType.TYPE_NONE) {
+      return false
+    }
+    return true
+  }
 }
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