IOS network detection Reachability uses Demo to detect 2, 3, 4G, iosreachability

IOS network detection Reachability uses Demo to detect 2, 3, 4G, iosreachability

You can download this Demo https://github.com/JanzTam/Reachability_Demo At Github

 

First, introduce the Reachability class of the system. If you do not know how to introduce it, In Xcode, press shift + command + 0 and search for Reachability. You can see the project selected in the figure and download it.

Reachability.png and import related. h files # import <CoreTelephony/CTTelephonyNetworkInfo. h>

After the introduction, modify the NetworkStatus enumeration in the Reachability. h file,

typedef enum : NSInteger {    NotReachable = 0,    ReachableViaWiFi,    ReachableViaWWAN,    kReachableVia2G,    kReachableVia3G,    kReachableVia4G} NetworkStatus;

Modify the Reachability. m file.
Find

- (NetworkStatus)networkStatusForFlags:(SCNetworkReachabilityFlags)flags

Modify the following code

if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)    {if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)        {            CTTelephonyNetworkInfo * info = [[CTTelephonyNetworkInfo alloc] init];            NSString *currentRadioAccessTechnology = info.currentRadioAccessTechnology;            if (currentRadioAccessTechnology)            {                if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyLTE])                {                    returnValue =  kReachableVia4G;                }                else if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyEdge] || [currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyGPRS])                {                    returnValue =  kReachableVia2G;                }                else                {                    returnValue =  kReachableVia3G;                }                return returnValue;            }        }        if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection)        {            if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired)            {                returnValue =  kReachableVia2G;                return returnValue;            }            returnValue =  kReachableVia3G;            return returnValue;        }        returnValue = ReachableViaWWAN;    }

How to use it?

Add in AppDelegate

-(BOOL) application :( UIApplication *) application didfinishlaunchingwitexceptions :( NSDictionary *) launchOptions {// set the status bar [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleDefault]; // monitor network conditions [[nsicationicationcenter defacenter center] addObserver: self selector: @ selector (reachabilityChanged :) name: jsonobject: nil]; hostReach = [Reachability failed: @ "www.baidu.com"]; [hostReach startNotifier];}

- (void)reachabilityChanged:(NSNotification *)note{    Reachability* curReach = [note object];    NSParameterAssert([curReach isKindOfClass: [Reachability class]]);    NetworkStatus status = [curReach currentReachabilityStatus];    switch (status)    {        case NotReachable:            break;        case ReachableViaWiFi:        case ReachableViaWWAN:            break;        case kReachableVia2G:            break;        case kReachableVia3G:            break;        case kReachableVia4G:            break;    }}