Я программно создал второй контроллер вида (MySecondViewController), который был полностью готов и подключен без использования редактора визуальных объектов.
Моя проблема в том, что когда я запускаю приложение, появляется только оригинальный контроллер представления (HelloWorldViewController); Контроллер второго вида не отображается. Когда я нажимаю на представление для HelloWorldViewController, ничего не появляется.
Можете ли вы сказать мне, что не так?
windowBasedAppAppDelegate.h
#import <UIKit/UIKit.h>
//-- Add a forward reference to the HelloWorldViewController class --
@class HelloWorldViewController;
@interface windowBasedAppAppDelegate : NSObject <UIApplicationDelegate> {
//-- create an instance of the view controller--
HelloWorldViewController *viewController;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;
//--Expose the view controller as a property--
@property (nonatomic, retain) IBOutlet HelloWorldViewController *viewController;
@end
windowBasedAppAppDelegate.m
#import "windowBasedAppAppDelegate.h"
#import "HelloWorldViewController.h"
#import "MySecondViewController.h"
@implementation windowBasedAppAppDelegate
@synthesize window;
@synthesize viewController;
//-- a second view controller object--
MySecondViewController *mySecondViewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
//-- add the new view to the current window--
//-- instantiate the second view controller --
mySecondViewController = [[MySecondViewController alloc]
initWithNibName:nil
bundle:nil];
// -- add the view from the second controller --
//[window addSubview:mySecondViewController.view];
[window addSubview:viewController.view];
[self.window makeKeyAndVisible];
return YES;
}
- (void)dealloc
{
[MySecondViewController release];
[viewController release];
[window release];
[super dealloc];
}
@end
MySecondViewController.h
#import <UIKit/UIKit.h>
@interface MySecondViewController : UIViewController {
//-- create two outlets, label and button --
UILabel *label;
UIButton *button;
}
//-- expose the outlets as properties --
@property (nonatomic, retain) UILabel *label;
@property (nonatomic, retain) UIButton *button;
// -- declaring the IBAction ---
- (IBAction) buttonClicked: (id)sender;
@end
MySecondViewController.h
#import "MySecondViewController.h"
@implementation MySecondViewController
@synthesize label, button;
- (IBAction) buttonClicked: (id)sender {
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle:@"Action Invoked!" message:@"Button clicked" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[super dealloc];
}
HelloWorldViewController.h
#import <UIKit/UIKit.h>
@interface HelloWorldViewController : UIViewController {
}
@end
HelloWorldViewController.m
импорт "HelloWorldViewController.h"
@implementation HelloWorldViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[super dealloc];
}
Добавлен код из MySecondViewController.m
//-- add the views to the view window --
[self.view addSubview:label];
[self.view addSubview:button];
[view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];
self.view = view;
[super viewDidLoad];