问题
I want to check if the device has a 2G or 3G connection.
I used Reachability class for network connection check.
回答1:
In iOS 7 Apple provided a new way to get it.
Please read this link. The "Know your Radio" section.
The basic idea is to use the new
currentRadioAccessTechnology
added to the CTTelephonyNetworkInfo class. If you want to get notified everytime the connection changes you can listen for:
CTRadioAccessTechnologyDidChangeNotification
Heres a code snippet took from the provided link:
CTTelephonyNetworkInfo *telephonyInfo = [CTTelephonyNetworkInfo new];
NSLog(@"Current Radio Access Technology: %@", telephonyInfo.currentRadioAccessTechnology);
[NSNotificationCenter.defaultCenter addObserverForName:CTRadioAccessTechnologyDidChangeNotification
object:nil
queue:nil
usingBlock:^(NSNotification *note)
{
NSLog(@"New Radio Access Technology: %@", telephonyInfo.currentRadioAccessTechnology);
}];
I hope this helps you.
来源：https://stackoverflow.com/questions/20042445/how-to-check-network-2g-or-3g-in-ios