Multi-View Application Problem

I want to make multi view application. My goal is when program launch to load first view controller and then when press the button t开发者_如何学运维o load new tab bar controller and dismiss first controller. I try myself and I do firt step, but when tab bar controller is loaded it's appear only small tab without any tabs and old controller doesn't disappear.

This is what I've done:

SwitchAppelegate

-- Header file --
#import <UIKit/UIKit.h>

@class SwitchClass;

@interface SwitchAppDelegate : NSObject <UIApplicationDelegate> {
    SwitchClass *switchClass;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet SwitchClass *switchClass;

@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;

- (void)saveContext;
- (NSURL *)applicationDocumentsDirectory;

@end

-- Implementation file --
#import "SwitchAppDelegate.h"

@implementation SwitchAppDelegate


@synthesize window=_window;

@synthesize managedObjectContext=__managedObjectContext;

@synthesize managedObjectModel=__managedObjectModel;

@synthesize persistentStoreCoordinator=__persistentStoreCoordinator;

@synthesize switchClass;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    [self.window addSubview:[switchClass view]];

    [self.window makeKeyAndVisible];
    return YES;
}

SwitchClass

-- Header file --

#import <UIKit/UIKit.h>
@class BlueClass;

@interface SwitchClass : UIViewController {
    BlueClass *blueClass;
}

@property (nonatomic, retain) IBOutlet BlueClass *blueClass;

@end

-- Implementation file --

#import "SwitchClass.h"
#import "BlueClass.h"

@implementation SwitchClass

@synthesize blueClass;

-(void) viewDidLoad {
    BlueClass *blue = [[BlueClass alloc] initWithNibName:@"BlueClass" bundle:nil];
    self.blueClass = blue;

    [self.view insertSubview:blue.view atIndex:0];
    [blue release];

    [super viewDidLoad];
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{
    [blueClass release];
    [super dealloc];
}

BlueClass

-- Header file --

@class RedClass;

@interface BlueClass : UIViewController {
    RedClass *redClass;
}

@property (nonatomic, retain) IBOutlet RedClass *redClass;

-(IBAction) switch: (id) sender;

@end

-- Implementation file --

#import "BlueClass.h"
#import "RedClass.h"

@implementation BlueClass

@synthesize redClass;

-(IBAction) switch: (id) sender {
    RedClass *blue = [[RedClass alloc] initWithNibName:@"RedClass" bundle:nil];
    self.redClass = blue;
//    self.window.rootViewController = self.tabBarController;
    [self.view addSubview:blue.view];
    [blue release];

    [super viewDidLoad];
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{
    [redClass release];
    [super dealloc];
}

RedClass

-- Header file --

#import <UIKit/UIKit.h>

@interface RedClass : UITabBarController {

}

@end

-- Implementation file --

#import "RedClass.h"

@implementation RedClass


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{   
    [super dealloc];
}

First thing is that in the appDelegate you are adding the view of SwitchClass. But SwitchClass is a UIViewController class and not UIView. so instead of that you should add your SwitchClass as a rootController like this:

self.window.rootViewController = self.switchClass;

If I were you I would just use a tab bar template provided by XCode. It will do it for you automatically.