CODEWITHSUNDEEP
iphoneobjective-c
Rocky
Rocky

Reputation: 1423

DidFinishLaunching problem in application of iphone

Hello I have problem with didFinishLaunching methods. I am really getting confused about what was the problem and that's why I pasted all my code. The problem was the application didn't launch, it crashed, and it show me this message in console: 

**[Demo1AppDelegate setMapViewController:]: unrecognized selector sent to instance 0x5649a30
2011-05-25 14:17:58.724 Demo1[10630:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Demo1AppDelegate setMapViewController:]: unrecognized selector sent to instance 0x5649a30'**

I am using this code In Demo1appDelegate.h file

#import <UIKit/UIKit.h>
#import "MapViewController.h"

@interface Demo1AppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    MapViewController *mapViewController;
}

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

@end

And in Demo1AppDelegate.m file

#import "Demo1AppDelegate.h"
@interface Demo1AppDelegate ()
@property (nonatomic, retain) MapViewController *mapViewController;
@end

@implementation Demo1AppDelegate

@synthesize window;


#pragma mark -
#pragma mark Application lifecycle

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    MapViewController *viewController = [[MapViewController alloc] init];
    self.mapViewController = viewController;

    [viewController release];

    [window addSubview:self.mapViewController.view];
    [window makeKeyAndVisible];

    return YES;
}


- (void)dealloc {
    [mapViewController release];

    [window release];
    [super dealloc];
}


@end

Upvotes: 1

Views: 1086

Answers (8)

vakio
vakio

Reputation: 3177

You have to @synthesize mapViewController; in Demo1AppDelegate.m

You should also add [mapViewController release]; in the dealloc method of Demo1AppDelegate.m (with mapViewController being an instance variable).

Upvotes: 1

Dale Botha
Dale Botha

Reputation: 135

Hey! Where you add the subview 

[window addSubview:self.mapViewController.view]; [window makeKeyAndVisible];

Try without "self"

[window addSubview:mapViewController.view]; [window makeKeyAndVisible];

Just a flying guess.

Upvotes: 0

Nitish
Nitish

Reputation: 14113

Try adding 

@class MapViewController

before @implementation Demo1AppDelegate in Demo1AppDelegate.h

Upvotes: 0

Ken
Ken

Reputation: 31161

Synthesize your map view controller.

Upvotes: 1

Michał Kreft
Michał Kreft

Reputation: 558

the problem is in this line self.mapViewController = viewController;

you forgot @synthesize mapViewController;

Upvotes: 1

visakh7
visakh7

Reputation: 26390

I think

self.mapViewController = viewController;

is the problem. You do not have @synthesize for mapViewController. So you cannot access through self

Or another option is to try this

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    mapViewController = [[MapViewController alloc] init];
    [window addSubview:mapViewController.view];
    [window makeKeyAndVisible];

    return YES;
}

Upvotes: 4

Crazy Developer
Crazy Developer

Reputation: 3464

You need to implement UIApplication

change 

@interface Demo1AppDelegate : NSObject

to 

@interface Demo1AppDelegate : NSObject  < UIApplicationDelegate>

This will solve your problem

Upvotes: 1

DivineDesert
DivineDesert

Reputation: 6954

Add delegate as follows ... This might be the issue : @interface Demo1AppDelegate : NSObject <UIApplicationDelegate>

Upvotes: 0

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