如何确定用户是在iPhone上的Edge还是3G

Question

Though it is relatively straightforward to determine if an iPhone is on Wifi or a data network programmatically in your application, I can't figure out a way to determine if the iPhone is on Edge or 3G.

Anybody figure out a way to determine this?

Note: Not worried about Apple AppStore acceptance policies so I don't mind doing something hacky in my app. (The iPhones should not have to be jailbroken though)

Answer 1

The iPhone doesn't provide this kind of information to developers programmatically. The best you can hope for is to determine whether a connection to a given host will have to be routed over a cell network - see the SCNetworkReachability reference and the Reachability project for more.

Answer 2

假设Tim的答案是正确的，你可以通过一种方式判断用户是处于3G还是边缘，你可以通过启动计时器来测试连接的速度，该计时器让应用程序从网上下载一些文件并计算速度，你应该能够通过速度的差异来判断它们是在3G还是Edge上。

Answer 3

Try checking it from the status bar:

UIApplication *app = [UIApplication sharedApplication];
NSArray *subviews = [[[app valueForKey:@"statusBar"] valueForKey:@"foregroundView"]    subviews];
NSNumber *dataNetworkItemView = nil;

for (id subview in subviews) {
    if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {
        dataNetworkItemView = subview;
        break;
    }
}
int connectivity;
connectivity =  [dataNetworkItemView valueForKey:@"dataNetworkType"];

And the value keys I've found so far:

0 = No wifi or cellular

1 = 2G and earlier? (not confirmed)

2 = 3G? (not yet confirmed)

3 = 4G

4 = LTE

5 = Wifi

Answer 4

one way you can detect iPhone 2G for sure is to look at the device name as reported by the OS

#import <sys/utsname.h>
+ (NSString *)deviceType {
    struct utsname u;
    uname(&u);
    NSString *returnValue = [NSString stringWithFormat:@"%s", u.machine];

    return returnValue;
}

the return value you are looking for is "iPhone1,1" to indicated iPhone 2G. combine this with the Reachability project to tell when they're on a cell network and you you have 1 avenue to guarantee that they are on an edge connection