在iOS 5中编译反向地理编码

Question

I'm writing a program for iOS 5. The program should perform reverse geocoding.

When trying to compile I get the warning

MKReverseGeocoder is deprecated

and an error

Undefined symbols for architecture i386: "_OBJC_CLASS_$_CLLocationManager", referenced from: objc-class-ref in UserLocationAddressViewController.o"

I have 2 questions:

1. How can I compile without the warning and the error?
2. I want the application to run on iOS 3, iOS 4, and on iOS 5. How can I do it?

Answer 1

You need to make sure your deployment target is set to the lowest iOS version you want to support. In the example below, the app is built for 5.0 (base SDK), but will run on iOS 4.0 (deployment target):

Setting this to any value below 5.0 will remove the deprecation warning.