Created
May 27, 2011 00:20
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Reachability
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// | |
// NPReachability+Backward.h | |
// | |
// NPReachability+Backward is a category over the NPReachability class. | |
// | |
// It implements some of the Reachability methods and thus makes it easy to integrate with existing projects. | |
// | |
#import <Foundation/Foundation.h> | |
#import "NPReachability.h" | |
typedef enum { | |
NotReachable = 0, | |
ReachableViaWiFi, | |
ReachableViaWWAN | |
} NetworkStatus; | |
#define kReachabilityChangedNotification @"kNetworkReachabilityChangedNotification" | |
/** | |
A backward compatibility category over NPReachability. | |
An implementation of some of the classic Reachability class. | |
*/ | |
@interface NPReachability (Backward) | |
//reachabilityForInternetConnection- checks whether the default route is available. | |
// Should be used by applications that do not connect to a particular host | |
+ (NPReachability*) reachabilityForInternetConnection; | |
//reachabilityForLocalWiFi- checks whether a local wifi connection is available. | |
+ (NPReachability*) reachabilityForLocalWiFi; | |
//Start listening for reachability notifications on the current run loop | |
- (BOOL) startNotifer; | |
- (void) stopNotifer; | |
- (APNetworkStatus) currentReachabilityStatus; | |
@end |
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// | |
// NPReachability+Backward.m | |
// | |
// | |
// Created by Tom Susel on 5/10/11. | |
// | |
#import "NPReachability+Backward.h" | |
@interface NPReachability () | |
- (NetworkStatus) networkStatusForFlags: (SCNetworkReachabilityFlags) flags; | |
@end | |
void (^reachabilityDidChange)(SCNetworkReachabilityFlags flags) = ^(SCNetworkReachabilityFlags flags){ | |
[[NSNotificationCenter defaultCenter] postNotificationName:kReachabilityChangedNotification | |
object:[NPReachability sharedInstance]]; | |
}; | |
@implementation NPReachability (Backward) | |
//reachabilityWithHostName- Use to check the reachability of a particular host name. | |
+ (NPReachability*) reachabilityWithHostName: (NSString*) hostName{ | |
return [NPReachability sharedInstance]; | |
} | |
//reachabilityWithAddress- Use to check the reachability of a particular IP address. | |
+ (NPReachability*) reachabilityWithAddress: (const struct sockaddr_in*) hostAddress{ | |
return [NPReachability sharedInstance]; | |
} | |
//reachabilityForInternetConnection- checks whether the default route is available. | |
// Should be used by applications that do not connect to a particular host | |
+ (NPReachability*) reachabilityForInternetConnection{ | |
return [NPReachability sharedInstance]; | |
} | |
//reachabilityForLocalWiFi- checks whether a local wifi connection is available. | |
+ (NPReachability*) reachabilityForLocalWiFi{ | |
return [NPReachability sharedInstance]; | |
} | |
- (BOOL) startNotifer{ | |
[[NPReachability sharedInstance] addHandler:reachabilityDidChange]; | |
return YES; | |
} | |
- (void) stopNotifer{ | |
[[NPReachability sharedInstance] removeHandler:reachabilityDidChange]; | |
} | |
- (NetworkStatus) currentReachabilityStatus{ | |
return [self networkStatusForFlags: | |
[self currentReachabilityFlags]]; | |
} | |
#pragma mark - | |
#pragma mark NPReachability+Backward - Private | |
- (NetworkStatus) networkStatusForFlags: (SCNetworkReachabilityFlags) flags | |
{ | |
if ((flags & kSCNetworkReachabilityFlagsReachable) == 0) | |
{ | |
// if target host is not reachable | |
return NotReachable; | |
} | |
BOOL retVal = NotReachable; | |
if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0) | |
{ | |
// if target host is reachable and no connection is required | |
// then we'll assume (for now) that your on Wi-Fi | |
retVal = ReachableViaWiFi; | |
} | |
if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) || | |
(flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0)) | |
{ | |
// ... and the connection is on-demand (or on-traffic) if the | |
// calling application is using the CFSocketStream or higher APIs | |
if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0) | |
{ | |
// ... and no [user] intervention is needed | |
retVal = ReachableViaWiFi; | |
} | |
} | |
if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN) | |
{ | |
// ... but WWAN connections are OK if the calling application | |
// is using the CFNetwork (CFSocketStream?) APIs. | |
retVal = ReachableViaWWAN; | |
} | |
return retVal; | |
} | |
@end |
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