-(id)initWithUserName:(NSString *)name andPassword:(NSString *)password {
    self = [super init];
    if (nil == self) {
        return nil;
    }

    // display or store login info somewhere
    [someLabel setText:name];

    return self
}

[[UIApplication sharedApplication] delegate]

// Get the string from the server
NSString *string = [get string from server];

// Create the second controller
SecondViewController *controller = [[SecondViewController alloc] initWithNibName:@"nibname" bundle:nil];

// Set the text property of a label in the controller
controller.myLabel.text=string;

// Add the view to the window so we can see it
[[[[UIApplication sharedApplication] delegate] window] addSubview:controller.view];

@interface SecondViewController {
  UILabel *myLabel;
}

@property (nonatomic, retain) IBOutlet UILabel *myLabel;

@end

NSString *str1 = @"Apple";
NSString *str2 = @"Orange";

if([str1 isEqualToString: str2]) {

}else{

}