问题
Maybe is there a good way to determine if I have an internet connection or not? (3G or wifi) Thanks!
回答1:
Here's something a new search engine called Google revealed:
iPhone SDK: Testing Network Reachability
回答2:
See SCNetworkReachabilityRef datatype in the SystemConfigration framework. It does not test the network per se, it's a framework around ping.
来源：https://stackoverflow.com/questions/2401987/network-reachability-on-iphone