Question

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What is the right way to check for a null string in Objective-C?

if my url is null i should assign the url variable with empty..i ve tried but still not getting entered in my IF statement.i even tried this if([url isEqualToString:@""])
but its in vain
below is the code

-(void)newView:(NSString *)title Description:(NSString *)desc URL:(NSString *)url{
self.tblTwitter.userInteractionEnabled=NO;
self.tblFacebook.userInteractionEnabled=NO;

if (![url isEqualToString:@""])
{
    //
    NSLog(@"the perfect Value:%@",url);
 //   url=@"boom";
}
webView =[[UIWebView alloc]initWithFrame:CGRectMake(15, 25, 190, 190)];
webView.backgroundColor=[UIColor clearColor];
webView.delegate=self;
webView.opaque = NO;

Answer 1

Did you try that :

if (url == nil)

nil is the Objective-C for NULL, and nil doesn’t means empty.

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