Help with Program Crashing

Discussion in 'iOS Programming' started by andynov, Jul 11, 2012.

  1. andynov, Jul 11, 2012
    Last edited by a moderator: Jul 11, 2012

    andynov macrumors newbie

    Joined:
    Jul 11, 2012
    #1
    My program builds without any errors but when the app inside the ios simulator launches it crashes. Not sure why.

    Heres my code

    Code:
    #import <UIKit/UIKit.h>
    
    
    @interface sR : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>
    {
    	UIPickerView *singlePecker;
    	NSArray *pickerArray;
    }
    @property (nonatomic, retain) IBOutlet UIPickerView *singlePecker;
    @property (nonatomic, retain) NSArray *pickerArray;
    -(IBAction) pressButton;
    @end
    
    
    Code:
    #import "sR.h"
    
    @implementation sR
    
    @synthesize singlePecker;
    @synthesize pickerArray;
    
    -(IBAction) pressButton{
    	NSInteger row = [singlePecker selectedRowInComponent:0];
    	NSString *choice = [pickerArray objectAtIndex:row];
    	
    	UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"title" message:choice delegate:nil cancelButtonTitle:@"cancel" otherButtonTitles:nil];
    	[alert show];
    	[alert release];
    	
    }
    
    - (void)viewDidLoad {
    	NSArray *x = [[NSArray alloc]initWithObjects:@"tuna", @"fish", @"apple", @"computers", @"ribbons", nil];
    	self.pickerArray=x;
    	[x release];
    }
    
    - (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 {
    	self.singlePecker=nil;
    	self.pickerArray=nil;
    	
    }
    
    
    - (void)dealloc {
    	[singlePecker release];
    	[pickerArray release];
        [super dealloc];
    }
    
    //////////// 
    
    -(NSInteger) numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    	return 1;
    }
    
    - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    	return [pickerArray count];
    }
    
    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    	return [pickerArray objectAtIndex:row];
    }
    @end
    
    and heres the app delegate .m and .h

    Code:
    
    #import <UIKit/UIKit.h>
    
    @interface iRAppDelegate : NSObject <UIApplicationDelegate> {
        UIWindow *window;
    	UITabBarController *rootController;
    }
    
    @property (nonatomic, retain) IBOutlet UIWindow *window;
    @property (nonatomic, retain) IBOutlet UITabBarController *rootController;
    @end
    
    
    
    Code:
    #import "iRAppDelegate.h"
    
    @implementation iRAppDelegate
    
    @synthesize window;
    @synthesize rootController;
    
    #pragma mark -
    #pragma mark Application lifecycle
    
    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
        
        // Override point for customization after application launch.
        
    	[window addSubview:rootController.view];
    	[window makeKeyAndVisible];
    	
        
        return YES;
    }
    
    
    - (void)applicationWillResignActive:(UIApplication *)application {
        /*
         Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
         Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
         */
    	
    }
    
    
    - (void)applicationDidEnterBackground:(UIApplication *)application {
        /*
         Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
         If your application supports background execution, called instead of applicationWillTerminate: when the user quits.
         */
    }
    
    
    - (void)applicationWillEnterForeground:(UIApplication *)application {
        /*
         Called as part of  transition from the background to the inactive state: here you can undo many of the changes made on entering the background.
         */
    }
    
    
    - (void)applicationDidBecomeActive:(UIApplication *)application {
        /*
         Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
         */
    }
    
    
    - (void)applicationWillTerminate:(UIApplication *)application {
        /*
         Called when the application is about to terminate.
         See also applicationDidEnterBackground:.
         */
    }
    
    
    #pragma mark -
    #pragma mark Memory management
    
    - (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
        /*
         Free up as much memory as possible by purging cached data objects that can be recreated (or reloaded from disk) later.
         */
    }
    
    
    - (void)dealloc {
        [window release];
    	[rootController release];
    	[super dealloc];
    }
    
    
     
  2. Tander macrumors 6502a

    Tander

    Joined:
    Oct 21, 2011
    Location:
    Johannesburg, South Africa
    #2
    Normally there is an output to the console as to why it has crashed.
    Have you checked that?
     

Share This Page