IOS Judging network Status Simple example

Adding Systemconfiguration.framework to the project

The corresponding. h file

#import <UIKit/UIKit.h> @interface viewcontroller:uiviewcontroller//If the method is preceded by +, it is equivalent to the static method of the class, note here-(BOOL) Connectedtonetwork; @end

The corresponding. m file

#import "ViewController.h" #import <Foundation/Foundation.h> #import <CommonCrypto/CommonHMAC.h> #import <SystemConfiguration/SystemConfiguration.h> #import <netdb.h> #import <arpa/inet.h> @interface    Viewcontroller () @end @implementation viewcontroller-(void) viewdidload {[Super viewdidload];    UIButton *btn = [[UIButton alloc]init];    Btn.frame = CGRectMake (20, 20, 40, 40);    Btn.backgroundcolor = [Uicolor Browncolor];    [Self.view ADDSUBVIEW:BTN];    [Btn addtarget:self Action: @selector (testout:) forcontrolevents:uicontroleventtouchupinside]; Do any additional setup after loading the view, typically from a nib.}    -(BOOL) connectedtonetwork{//Create Zero addy struct sockaddr_in zeroaddress;    Bzero (&zeroaddress, sizeof (zeroaddress));    Zeroaddress.sin_len = sizeof (zeroaddress);        zeroaddress.sin_family = af_inet; Recover reachability flags Scnetworkreachabilityref defaultroutereachability = ScnetworkreachabilitycreatewithaDdress (NULL, (struct sockaddr *) &zeroaddress);        Scnetworkreachabilityflags flags;    BOOL didretrieveflags = Scnetworkreachabilitygetflags (defaultroutereachability, &flags);        Cfrelease (defaultroutereachability); if (!didretrieveflags) {printf ("Error.        Could not recover network reachability flags\n ");        return NO;    } BOOL isreachable = ((Flags & kscnetworkflagsreachable)! = 0);    BOOL needsconnection = ((Flags & kscnetworkflagsconnectionrequired)! = 0); Return (isreachable &&!needsconnection)? Yes:no;} At the time of the call, add the judgment in the corresponding button:-(ibaction) Testout: (UIButton *) sender{if (![ Self connectedtonetwork]) {Uialertview *alert=[[uialertview alloc] initwithtitle:@ "Warm tip" message:@ "Network connection failed, please See if the network is connected properly!        "Delegate:self cancelbuttontitle:@" OK "otherbuttontitles:nil];        [Alert show]; } NSLog (@ "Testout Event");}    -(void) didreceivememorywarning {[Super didreceivememorywarning]; Dispose ofAny resources which can be recreated.} @end

IOS Judging network Status Simple example