xcode 'NSInvalidArgumentException', reason: '-[cure superview]: unrecognized selector sent to instance 0x4e3b7b0' - objective-c

Question

i am not sure why i am getting this error
i created a regular tab bar application
made 5 tabs (compiles and runs)
then put a tableview in one of the tabs , put the code below and i get this error
cure.h
#import <UIKit/UIKit.h>
#interface cure : UIViewController
<UITableViewDataSource, UITableViewDelegate>
{
NSArray *exercises;
}
#end
cure.m
#import "cure.h"
#implementation cure
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
// create a cell
if ( cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:#"cell"];
}
// set the main text
cell.textLabel.text = [exercises objectAtIndex:indexPath.row];
// return the cell.
return cell;
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
exercises = [[NSArray alloc]
initWithObjects:#"An Interesting Title",
#"A Not That Interesting Title",
#"And Still Another Title", nil];
[super viewDidLoad];
}
- (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];
}
#end
in mainwindows.xib
i have the right tab class name "cure"
error
2011-04-29 22:22:06.446 week 3 week clear [4950:40b] -[cure superview]: unrecognized selector sent to instance 0x4e3b7b0
2011-04-29 22:22:06.451 peek 3 week clear [4950:40b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[cure superview]: unrecognized selector sent to instance 0x4e3b7b0'
*** Call stack at first throw:
(
0 CoreFoundation 0x00dc15a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x00f15313 objc_exception_throw + 44
2 CoreFoundation 0x00dc30bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x00d32966 ___forwarding___ + 966
4 CoreFoundation 0x00d32522 _CF_forwarding_prep_0 + 50
5 UIKit 0x002e2365 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 77
6 UIKit 0x002e0aa3 -[UIView(Hierarchy) addSubview:] + 57
7 UIKit 0x002e87c1 -[UIView initWithCoder:] + 840
8 Foundation 0x00017c24 _decodeObjectBinary + 3296
9 Foundation 0x00016d91 _decodeObject + 224
10 UIKit 0x004ac979 -[UIRuntimeConnection initWithCoder:] + 212
11 Foundation 0x00017c24 _decodeObjectBinary + 3296
12 Foundation 0x000189f5 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1354
13 Foundation 0x00019024 -[NSArray(NSArray) initWithCoder:] + 596
14 Foundation 0x00017c24 _decodeObjectBinary + 3296
15 Foundation 0x00016d91 _decodeObject + 224
16 UIKit 0x004abc36 -[UINib instantiateWithOwner:options:] + 804
17 UIKit 0x004adab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
18 UIKit 0x00363628 -[UIViewController _loadViewFromNibNamed:bundle:] + 70
19 UIKit 0x00361134 -[UIViewController loadView] + 120
20 UIKit 0x0036100e -[UIViewController view] + 56
21 UIKit 0x00373f54 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 120
22 UIKit 0x00372aaa -[UITabBarController transitionFromViewController:toViewController:] + 64
23 UIKit 0x003748a2 -[UITabBarController _setSelectedViewController:] + 263
24 UIKit 0x00374711 -[UITabBarController _tabBarItemClicked:] + 352
25 UIKit 0x002b14fd -[UIApplication sendAction:to:from:forEvent:] + 119
26 UIKit 0x004b3ce6 -[UITabBar _sendAction:withEvent:] + 422
27 UIKit 0x002b14fd -[UIApplication sendAction:to:from:forEvent:] + 119
28 UIKit 0x00341799 -[UIControl sendAction:to:forEvent:] + 67
29 UIKit 0x00343c2b -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
30 UIKit 0x00341750 -[UIControl sendActionsForControlEvents:] + 49
31 UIKit 0x002b14fd -[UIApplication sendAction:to:from:forEvent:] + 119
32 UIKit 0x00341799 -[UIControl sendAction:to:forEvent:] + 67
33 UIKit 0x00343c2b -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
34 UIKit 0x003427d8 -[UIControl touchesEnded:withEvent:] + 458
35 UIKit 0x002d5ded -[UIWindow _sendTouchesForEvent:] + 567
36 UIKit 0x002b6c37 -[UIApplication sendEvent:] + 447
37 UIKit 0x002bbf2e _UIApplicationHandleEvent + 7576
38 GraphicsServices 0x01719992 PurpleEventCallback + 1550
39 CoreFoundation 0x00da2944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
40 CoreFoundation 0x00d02cf7 __CFRunLoopDoSource1 + 215
41 CoreFoundation 0x00cfff83 __CFRunLoopRun + 979
42 CoreFoundation 0x00cff840 CFRunLoopRunSpecific + 208
43 CoreFoundation 0x00cff761 CFRunLoopRunInMode + 97
44 GraphicsServices 0x017181c4 GSEventRunModal + 217
45 GraphicsServices 0x01718289 GSEventRun + 115
46 UIKit 0x002bfc93 UIApplicationMain + 1160
47 peek 3 week clear 0x00002658 main + 102
48 peek 3 week clear 0x000025e9 start + 53
)
terminate called after throwing an instance of 'NSException'
Program received signal: “SIGABRT”.
what am i doing wrong?
thank you

Answer 1

You have probably assigned the "cure" class to a UIView in the "Identity" tab in Interface Builder. "cure" is a view controller, so it doesn't implement any UIView methods (such as -superview), and thus throws an exception when trying to load the nib.
Btw, you have a whole bunch of leaks in your code, please read something about memory management in Objective-C (perhaps also about Cocoa naming conventions).