ios - Network / Internet Connection - ios

Question

After hours of searching on google I still cant find a single topic about this one:
1. I need to put error handling functions if the user does not have internet connection.
2. the user have internet connection but cant connect to the server .
And where can I put these? I tried one topic but it don't show the alert view message.
Here is my code:
- (IBAction)getDataPressed
{
if([myRequest_ isExecuting])
{
return;
}
if(myRequest_ != nil)
{
[myRequest_ release];
}
myRequest_ = [[ASIHTTPRequest alloc]initWithURL:[NSURL URLWithString:URL_PATH]];
myRequest_.delegate = self;
[myRequest_ startAsynchronous];
}
#pragma ASI Delegate methods
- (void)requestFinished:(ASIHTTPRequest *)request
{
NSLog(#"Request finished successfully");
NSLog(#"%#",[request responseString]);
NSDictionary *responseDictionary = [[request responseString]JSONValue];
NSDictionary *arrayElement = [responseDictionary objectForKey:#"user"];
NSString *ID = [arrayElement valueForKeyPath:#"id"];
NSLog(#"id: %#",ID);
NSString *usr = [arrayElement valueForKeyPath:#"usr"];
NSLog(#"usr: %#",usr);
NSString *gd = [arrayElement valueForKeyPath:#"gd"];
NSLog(#"gd: %#",gd);
NSString *ag = [arrayElement valueForKeyPath:#"ag"];
NSLog(#"ag: %#",ag);
NSString *st = [arrayElement valueForKeyPath:#"st"];
NSLog(#"st: %#",st);
NSString *lf = [arrayElement valueForKeyPath:#"lf"];
NSLog(#"lf: %#",lf);
NSString *da = [arrayElement valueForKeyPath:#"da"];
NSLog(#"da: %d",da);
for(NSString *value in [arrayElement allValues]){
NSLog(#"Found Value %#",value);
label.text = [value stringByAppendingFormat:#",%#,%#,%#,%#,%#,%#,",ID,usr,gd,ag,st,lf];
}
}
- (void)requestFailed:(ASIHTTPRequest *)request
{
NSLog(#"Error %#", [request error]);
if([request error])
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error" message:#"Destination Unreachable" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
-(void) dealloc
{
[super dealloc];
}
Thanks to those who will help ^_^

Answer 1

I think you could try the Reachbility application to help you out checking if you have internet or not. As for the server itself, you can use the NSUrlConnection Delegate methods to check if there was a problem with your request (by seeing the kind of HTTP code that comes)