如果我的应用程序在它的各种视图控制器中使用它，我应该在哪里实例化一个位置管理器?

I have an app that uses the user's location throughout its various view conrollers, and I've learned that in order to get that location you need to create a CLLocationManger instance and conform to the CLLocationManagerDelegate protocol.I have an app that uses the user's location thr