No me va el código

[ramondevesa]

Buenas, estoy realizando el manual que he visto en Maestros del Web sobre iPhone y me he quedado estancado en el primer ejercicio, a la hora de compilar el código que se introduce en el manual me lanza dos errores, les dejo el código en el cual me tira el error,

Código iPhone:

//
//  miAppViewController.m
//  miApp
//
//
 
#import "miAppViewController.h"
 
@synthesize miEtiqueta;
-(IBAction)cambiarEtiqueta{
miEtiqueta.text = @"Bazzinga!";
}
-(void)dealloc{
[miEtiqueta release];
[super dealloc];
}
 
@implementation miAppViewController
 
 
 
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/
 
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
 
 
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
}
*/
 
 
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
 
- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}
 
- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}
 
 
- (void)dealloc {
    [super dealloc];
}
 
@end
 

Gracias por todo un saludo.