Objective - C Connection Test Warnings - iphone

Question

I have the following code:
//View guest list
-(IBAction) guestList:(id) sender{
NSString *connected = [NSString stringWithContentsOfURL:[NSURL URLWithString:#"myURL"]];
//Waits a set peroid of time
wait(20000);
//Guest list is availible
if (connected != NULL){
CHARLIEAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
[appDelegate displayView:6];
}
//No network connection availible
else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"No Network Connection!" message:#"Cannot establish internet connection." delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
}
And I get the following warnings:
//Waits a set peroid of time
wait(20000);
Gives me -
warning: passing argument 1 of 'wait' makes pointer from integer without a cast
NSString *connected = [NSString stringWithContentsOfURL:[NSURL URLWithString:#"http://photostiubhart.comoj.com/testconnection.php"]];
Gives me -
warning: 'stringWithContentsOfURL:' is deprecated (declared at /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:384)
I've done my testing and the code SEEMS to work fine, even though there are these warnings. Is there a way to remove these warnings at all? Or do they not matter?
I'm using xCode version 3.2.6
Thanks,
Jack

Answer 1

use
NSError* error;
NSString* connected = [NSString stringWithContentsOfURL:TheUrl encoding:NSASCIIStringEncoding error:&error];

Answer 2

You should use the method -
+(id)stringWithContentsOfURL:(NSURL *)url encoding:(NSStringEncoding)enc error:(NSError **)error
for example -
NSString* text = [NSString stringWithContentsOfURL:TheUrl encoding:NSASCIIStringEncoding error:&error];
Hope it will help you.

Answer 3

Try doing it this way:
-(IBAction)guestList:(id) sender{
NSURL *requestUrl = [NSURL URLWithString:#"http://photostiubhart.comoj.com/testconnection.php"];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:requestUrl];
NSData *loadTest = [NSData dataWithContentsOfURL:requestUrl];
if (loadTest == nil) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"No Network Connection!" message:#"Cannot establish internet connection." delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
} else {
CHARLIEAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
[appDelegate displayView:6];
}
}