Nuestro objetivo es simple para una aplicación de iPhone: mostrar una página de inicio y luego esconderla cuando UIWebview esté listo para mostrar su página.

Necesitamos que la pantalla de inicio por defecto permanezca hasta que UIWebview esté listo para mostrar. De lo contrario, aparece brevemente una pantalla blanca.

Desafortunadamente, la pantalla de inicio no se oculta después de que la mantengamos. La pantalla de bienvenida predeterminada permanece visible, ocultando la vista de UIWeb debajo.

Entendemos que esto puede violar las directrices de Apple.

Esto es más para un prototipo que cualquier otra cosa, y nos gustaría entender qué estamos haciendo mal. ¿Alguna pista?

Estamos utilizando Xcode 4.2.

//
//  AppDelegate.m
//
//  Created by Macintosh User on 6/4/12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "AppDelegate.h"

#import "ViewController.h"

@implementation AppDelegate

@synthesize window = _window;
@synthesize viewController = _viewController;
@synthesize imgv;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];

    imgv = [[UIImageView alloc] init];
    [imgv setImage:[UIImage imageNamed:@"Default.png"]];
    [imgv setFrame:CGRectMake(0, 0, 320, 480)];
    [self.window addSubview:imgv];

    return YES;
}

@end

//
//  ViewController.m
// 
//
//  Created by Macintosh User on 6/4/12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "AppDelegate.h"
#import "ViewController.h"

@implementation ViewController

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    CGRect webFrame = CGRectMake(0.0, 0.0, 320.0, 460.0);
    UIWebView *webView = [[UIWebView alloc] initWithFrame:webFrame];
    [webView setBackgroundColor:[UIColor clearColor]];
    NSString *urlAddress = @"http://www.cnn.com";
    NSURL *url = [NSURL URLWithString:urlAddress];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [webView loadRequest:requestObj];

    for (id subview in webView.subviews)
        if ([[subview class] isSubclassOfClass: [UIScrollView class]])
            ((UIScrollView *)subview).bounces = NO;

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    UIImageView *imageView = appDelegate.imgv;
    [imageView removeFromSuperview];
    [imageView setHidden:YES];
    imageView = nil;

    [self.view addSubview:webView];
    [self.view bringSubviewToFront:webView];
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"Done loading UIWebView");
}

@end

Curret ViewController.m generando errores:

//
//  ViewController.m
//  Stroll
//
//  Created by Macintosh User on 6/4/12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "AppDelegate.h"
#import "ViewController.h"

@implementation ViewController

@synthesize splash;

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    CGRect webFrame = CGRectMake(0.0, 0.0, 320.0, 460.0);
    UIWebView *webView = [[UIWebView alloc] initWithFrame:webFrame];

    webView.delegate = self;

    [webView setBackgroundColor:[UIColor clearColor]];
    NSString *urlAddress = @"http://www.cnn.com";
    NSURL *url = [NSURL URLWithString:urlAddress];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [webView loadRequest:requestObj];

    for (id subview in webView.subviews)
        if ([[subview class] isSubclassOfClass: [UIScrollView class]])
            ((UIScrollView *)subview).bounces = NO;

    /*
    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    UIImageView *imageView = appDelegate.imgv;
    [imageView removeFromSuperview];
    [imageView setHidden:YES];
    imageView = nil; */

    [self.view addSubview:webView];
    [self.view bringSubviewToFront:webView];
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"Done loading UIWebView");
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{

        self.view.userInteractionEnabled = NO;

        splash = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].bounds];

        splash.image = [UIImage imageNamed:@"Default.png"];
        [self.view addSubview:splash];
    });
}

-(void) webViewDidFinishLoad:(UIWebView *)webView {

    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        [splash removeFromSuperView];
    });
}

@end