Whether the iOS test network is connected

Transferred from: http://blog.csdn.net/lwq421336220/article/details/16982857

-(BOOL) connectedtonetwork

{

Create 0 address, 0.0.0.0 address indicates the network connection status of the query native

Structsockaddr_in zeroaddress;

Bzero (&zeroaddress,sizeof (zeroaddress));

Zeroaddress.sin_len =sizeof (zeroaddress);

Zeroaddress.sin_family =af_inet;

Scnetworkreachabilityref defaultroutereachability =scnetworkreachabilitycreatewithaddress (NULL, (STRUCTSOCKADDR *) &zeroaddress);

Scnetworkreachabilityflags flags;

BOOL didretrieveflags =scnetworkreachabilitygetflags (defaultroutereachability, &flags);

Cfrelease (defaultroutereachability);

if (!didretrieveflags)

{

printf ("Error. Could not recover network reachability FLAGSN ");

Returnno;

}

BOOL isreachable = ((Flags &kscnetworkflagsreachable)! = 0);

BOOL needsconnection = ((Flags &kscnetworkflagsconnectionrequired)! = 0);

Return (isreachable &&!needsconnection)? Yes:no;

}

When used:

if ([Selfconnectedtonetwork]) {

}else{

Uialertview *alert=[[uialertviewalloc]initwithtitle:@ "prompted" message:@ "network connection failed, please check the network connection. "Delegate:self cancelbuttontitle:@" I Know "otherbuttontitles:nil,nil";

[Alertshow];

}

Whether the iOS test network is connected