1.处理mLoginOutReceiver为空的情况

app/src/main/java/com/xhly/manageapp/ui/main/activity/MainActivity.kt

         mXhlyUpdeteStrategyReceiver?.let {
             unregisterReceiver(it)
         }
-        mLoginOutReceiver.let {
+        mLoginOutReceiver?.let {
             unregisterReceiver(it)
         }
         LogShow("MainActivity被销毁")