iOS trouble with a tab bar controller loading a nib from a view controller

[geiger10d]

whenever i tell my tab bar to load a nib from a view controller, it crashes when i click on that tab... what can i do?

 

[nickculbertson]

There could be many reasons. Perhaps you didn't import the view correctly. Post some code. It's like calling a car mechanic and saying, "my car won't start. what do I do?
Nick

 

[geiger10d]

ok heres my header of the view i want to load

#import "FlipsideViewController.h"
#import "ParkPlaceMark.h"
#import <MapKit/MapKit.h>
#import <MapKit/MKReverseGeocoder.h>
#import <CoreLocation/CoreLocation.h>

@interface MainViewController : UIViewController <FlipsideViewControllerDelegate, MKAnnotation, MKMapViewDelegate, MKReverseGeocoderDelegate, CLLocationManagerDelegate> {
	MKMapView *mapView;
	MKPlacemark *mPlacemark;
	CLLocationCoordinate2D location;
	IBOutlet UIButton *mStoreLocationButton;
	CLLocationCoordinate2D coordinate;

	
}

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
-(id)initWithCoordinate:(CLLocationCoordinate2D) coordinate;
- (NSString *)subtitle;
- (NSString *)title;

- (IBAction)showInfo;
- (IBAction)storeLocationInfo:(id) sender;

@end


and heres the implementation 



#import "MainViewController.h"
#import "MainView.h"


@implementation MainViewController

@synthesize coordinate;

- (NSString *)subtitle{
	return @"Put some text here";
}
- (NSString *)title{
	return @"Parked Location";
}

-(id)initWithCoordinate:(CLLocationCoordinate2D) c{
	coordinate=c;
	NSLog(@"%f,%f",c.latitude,c.longitude);
	return self;
}


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


 // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
 - (void)viewDidLoad {
 [super viewDidLoad];
	 mapView=[[MKMapView alloc] initWithFrame:self.view.frame];
	 //mapView.showsUserLocation=TRUE;
	 mapView.delegate=self;
	 [self.view insertSubview:mapView atIndex:0];
	 
	 
	 CLLocationManager *locationManager=[[CLLocationManager alloc] init];
	 locationManager.delegate=self;
	 locationManager.desiredAccuracy=kCLLocationAccuracyNearestTenMeters;
	 
	 [locationManager startUpdatingLocation];
	 
	 

 }


- (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller {
    
	[self dismissModalViewControllerAnimated:YES];
}


- (IBAction)showInfo {    
	
	FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"FlipsideView" bundle:nil];
	controller.delegate = self;
	
	controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
	[self presentModalViewController:controller animated:YES];
	
	[controller release];
}



/*
 // Override to allow orientations other than the default portrait orientation.
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
 // Return YES for supported orientations
 return (interfaceOrientation == UIInterfaceOrientationPortrait);
 }
 */

- (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 {
	// Release any retained subviews of the main view.
	// e.g. self.myOutlet = nil;
}


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


- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error{
}

- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark{
	NSLog(@"Geocoder completed");
	mPlacemark=placemark;
	[mapView addAnnotation:placemark];
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
	NSLog(@"View for Annotation is called");
	MKPinAnnotationView *test=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"parkingloc"];
	test.userInteractionEnabled=TRUE;
	if([annotation title]==@"Parked Location")
	{
		NSLog(@"Here");
		[test setPinColor:MKPinAnnotationColorPurple];
	}
	else
	{
		[test setPinColor:MKPinAnnotationColorGreen];
	}
	return test;
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
	mStoreLocationButton.hidden=FALSE;
	location=newLocation.coordinate;
	//One location is obtained.. just zoom to that location
	
	MKCoordinateRegion region;
	region.center=location;
	//Set Zoom level using Span
	MKCoordinateSpan span;
	span.latitudeDelta=.005;
	span.longitudeDelta=.005;
	region.span=span;
	
	[mapView setRegion:region animated:TRUE];

}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
}

- (IBAction)storeLocationInfo:(id) sender{
	//Either we can use geocoder to get a placemark or just create our own.
	/*
	MKReverseGeocoder *geocoder=[[MKReverseGeocoder alloc] initWithCoordinate:location];
	geocoder.delegate=self;
	[geocoder start];
	*/
	//Our own
	
	ParkPlaceMark *placemark=[[ParkPlaceMark alloc] initWithCoordinate:location];
	[mapView addAnnotation:placemark];
}


@end

#import "MainViewController.h"
#import "MainView.h"


@implementation MainViewController

@synthesize coordinate;

- (NSString *)subtitle{
	return @"Put some text here";
}
- (NSString *)title{
	return @"Parked Location";
}

-(id)initWithCoordinate:(CLLocationCoordinate2D) c{
	coordinate=c;
	NSLog(@"%f,%f",c.latitude,c.longitude);
	return self;
}


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


 // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
 - (void)viewDidLoad {
 [super viewDidLoad];
	 mapView=[[MKMapView alloc] initWithFrame:self.view.frame];
	 //mapView.showsUserLocation=TRUE;
	 mapView.delegate=self;
	 [self.view insertSubview:mapView atIndex:0];
	 
	 
	 CLLocationManager *locationManager=[[CLLocationManager alloc] init];
	 locationManager.delegate=self;
	 locationManager.desiredAccuracy=kCLLocationAccuracyNearestTenMeters;
	 
	 [locationManager startUpdatingLocation];
	 
	 

 }


- (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller {
    
	[self dismissModalViewControllerAnimated:YES];
}


- (IBAction)showInfo {    
	
	FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"FlipsideView" bundle:nil];
	controller.delegate = self;
	
	controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
	[self presentModalViewController:controller animated:YES];
	
	[controller release];
}



/*
 // Override to allow orientations other than the default portrait orientation.
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
 // Return YES for supported orientations
 return (interfaceOrientation == UIInterfaceOrientationPortrait);
 }
 */

- (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 {
	// Release any retained subviews of the main view.
	// e.g. self.myOutlet = nil;
}


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


- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error{
}

- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark{
	NSLog(@"Geocoder completed");
	mPlacemark=placemark;
	[mapView addAnnotation:placemark];
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
	NSLog(@"View for Annotation is called");
	MKPinAnnotationView *test=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"parkingloc"];
	test.userInteractionEnabled=TRUE;
	if([annotation title]==@"Parked Location")
	{
		NSLog(@"Here");
		[test setPinColor:MKPinAnnotationColorPurple];
	}
	else
	{
		[test setPinColor:MKPinAnnotationColorGreen];
	}
	return test;
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
	mStoreLocationButton.hidden=FALSE;
	location=newLocation.coordinate;
	//One location is obtained.. just zoom to that location
	
	MKCoordinateRegion region;
	region.center=location;
	//Set Zoom level using Span
	MKCoordinateSpan span;
	span.latitudeDelta=.005;
	span.longitudeDelta=.005;
	region.span=span;
	
	[mapView setRegion:region animated:TRUE];

}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
}

- (IBAction)storeLocationInfo:(id) sender{
	//Either we can use geocoder to get a placemark or just create our own.
	/*
	MKReverseGeocoder *geocoder=[[MKReverseGeocoder alloc] initWithCoordinate:location];
	geocoder.delegate=self;
	[geocoder start];
	*/
	//Our own
	
	ParkPlaceMark *placemark=[[ParkPlaceMark alloc] initWithCoordinate:location];
	[mapView addAnnotation:placemark];
}


@end

 

[PhoneyDeveloper]

What does "crash" mean? Is there something in the debugger console? Is there a line of code that the debugger stops on?

 

[nickculbertson]

The flip utility function of your code looks fine. +1 for checking the debugger. Also it could be a IB problem.

 

[geiger10d]

this is the debugger 2011-02- after the crash (when i click on the tab loading a nib)

2011-02-13 11:24:01.122 iScheduleFitness[32236:207] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle </Users/lukegeiger/Library/Application Support/iPhone Simulator/4.2/Applications/DC319AE3-E7C2-4DFD-9698-380E429BF3A4/iScheduleFitness.app> (loaded)' with name 'MainViewController''
*** Call stack at first throw:
(
0 CoreFoundation 0x0118abe9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x012df5c2 objc_exception_throw + 47
2 CoreFoundation 0x01143628 +[NSException raise:format:arguments:] + 136
3 CoreFoundation 0x0114359a +[NSException raise:format:] + 58
4 UIKit 0x004ce6c4 -[UINib instantiateWithOwnerptions:] + 2024
5 UIKit 0x004d0081 -[NSBundle(UINSBundleAdditions) loadNibNamedwnerptions:] + 168
6 UIKit 0x00388a94 -[UIViewController _loadViewFromNibNamed:bundle:] + 70
7 UIKit 0x00386709 -[UIViewController loadView] + 120
8 UIKit 0x003865e3 -[UIViewController view] + 56
9 UIKit 0x00399230 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 120
10 UIKit 0x00397d86 -[UITabBarController transitionFromViewController:toViewController:] + 64
11 UIKit 0x00399b7e -[UITabBarController _setSelectedViewController:] + 263
12 UIKit 0x003999ed -[UITabBarController _tabBarItemClicked:] + 352
13 UIKit 0x002d8a6e -[UIApplication sendAction:to:from:forEvent:] + 119
14 UIKit 0x004d61f2 -[UITabBar _sendAction:withEvent:] + 422
15 UIKit 0x002d8a6e -[UIApplication sendAction:to:from:forEvent:] + 119
16 UIKit 0x003671b5 -[UIControl sendAction:to:forEvent:] + 67
17 UIKit 0x00369647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
18 UIKit 0x0036716c -[UIControl sendActionsForControlEvents:] + 49
19 UIKit 0x002d8a6e -[UIApplication sendAction:to:from:forEvent:] + 119
20 UIKit 0x003671b5 -[UIControl sendAction:to:forEvent:] + 67
21 UIKit 0x00369647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
22 UIKit 0x003681f4 -[UIControl touchesEnded:withEvent:] + 458
23 UIKit 0x002fd0d1 -[UIWindow _sendTouchesForEvent:] + 567
24 UIKit 0x002de37a -[UIApplication sendEvent:] + 447
25 UIKit 0x002e3732 _UIApplicationHandleEvent + 7576
26 GraphicsServices 0x01a57a36 PurpleEventCallback + 1550
27 CoreFoundation 0x0116c064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
28 CoreFoundation 0x010cc6f7 __CFRunLoopDoSource1 + 215
29 CoreFoundation 0x010c9983 __CFRunLoopRun + 979
30 CoreFoundation 0x010c9240 CFRunLoopRunSpecific + 208
31 CoreFoundation 0x010c9161 CFRunLoopRunInMode + 97
32 GraphicsServices 0x01a56268 GSEventRunModal + 217
33 GraphicsServices 0x01a5632d GSEventRun + 115
34 UIKit 0x002e742e UIApplicationMain + 1160
35 iScheduleFitness 0x0000289c main + 102
36 iScheduleFitness 0x0000282d start + 53
)
terminate called after throwing an instance of 'NSException'

 

[PhoneyDeveloper]

The error clearly states that it couldn't load the nib MainViewController. Either it doesn't exist or there's something wrong with its connections.