I’m new to ios development and to stackoverflow. I did try searching both stackoverflow and google before posting.
I built a simple little app, originally just left it an iphone only app, but decided to make it universal in the end. I, stupidly, was messing around when i was getting to know xcode 4 and switched it to universal and then back again so i had to recopy the project and do it again. This time i started it with a universal app. (Not when i created it but after i went to project and selected it there) It created the ipad folder and mainwindow-ipad.xib file but was empty of course since i didn’t do anything yet. I had it set up as a tabbed based app so my iphone version had firstview and secondview nib files also, but the ipad version didn’t. I set it all up in iphone version first and it worked fine. I then went and laid down the ipad version (i did eliminate the second tab from mainwindow-ipad because i didn’t need it)
i then went and created a new nib file and placed it in the ipad folder along with “main-ipad.h” and “main-ipad.m”. I copied my code and connected everything and it runs fine on ipad simulator but now when i try and run iphone simulator i get “SIGABRT error. I took a screen shot of it. I don’t fully understand objective-c so i was hoping someone can help me? I can post any code or whatever you might need to help me with this error so just ask.
Appreciate any help and suggestions you may have!
Thanks!
[Okay i would have posted image but I can’t since I’m a new user, instead i posted the line highlighted and the output from xcode]
Code for file with error:
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
int retVal = UIApplicationMain(argc, argv, nil, nil); //ERROR IS ON THIS LINE <-----
[pool release];
return retVal;
}
[OUTPUT]
2011-06-18 17:32:43.980 Price Assist[445:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x4e09cc0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key finallabel.'
*** Call stack at first throw:
(
0 CoreFoundation 0x00dc35a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x00f17313 objc_exception_throw + 44
2 CoreFoundation 0x00dc34e1 -[NSException raise] + 17
3 Foundation 0x00795677 _NSSetUsingKeyValueSetter + 135
4 Foundation 0x007955e5 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 285
5 UIKit 0x0021130c -[UIRuntimeOutletConnection connect] + 112
6 CoreFoundation 0x00d398cf -[NSArray makeObjectsPerformSelector:] + 239
7 UIKit 0x0020fd23 -[UINib instantiateWithOwner:options:] + 1041
8 UIKit 0x00211ab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
9 UIKit 0x000c7628 -[UIViewController _loadViewFromNibNamed:bundle:] + 70
10 UIKit 0x000c5134 -[UIViewController loadView] + 120
11 UIKit 0x000c500e -[UIViewController view] + 56
12 UIKit 0x00038d42 -[UIWindow addRootViewControllerViewIfPossible] + 51
13 Foundation 0x007955e5 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 285
14 UIKit 0x00048ff6 -[UIView(CALayerDelegate) setValue:forKey:] + 173
15 UIKit 0x0021130c -[UIRuntimeOutletConnection connect] + 112
16 CoreFoundation 0x00d398cf -[NSArray makeObjectsPerformSelector:] + 239
17 UIKit 0x0020fd23 -[UINib instantiateWithOwner:options:] + 1041
18 UIKit 0x00211ab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
19 UIKit 0x0001717a -[UIApplication _loadMainNibFile] + 172
20 UIKit 0x00017cf4 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 291
21 UIKit 0x00022617 -[UIApplication handleEvent:withNewEvent:] + 1533
22 UIKit 0x0001aabf -[UIApplication sendEvent:] + 71
23 UIKit 0x0001ff2e _UIApplicationHandleEvent + 7576
24 GraphicsServices 0x00ffc992 PurpleEventCallback + 1550
25 CoreFoundation 0x00da4944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
26 CoreFoundation 0x00d04cf7 __CFRunLoopDoSource1 + 215
27 CoreFoundation 0x00d01f83 __CFRunLoopRun + 979
28 CoreFoundation 0x00d01840 CFRunLoopRunSpecific + 208
29 CoreFoundation 0x00d01761 CFRunLoopRunInMode + 97
30 UIKit 0x000177d2 -[UIApplication _run] + 623
31 UIKit 0x00023c93 UIApplicationMain + 1160
32 Price Assist 0x000029a9 main + 121
33 Price Assist 0x00002925 start + 53
)
terminate called after throwing an instance of 'NSException'
iPhone FirstView nib file .h code:
@interface FirstViewController : UIViewController {
IBOutlet UITextField *dollarinput;
IBOutlet UITextField *centsinput;
IBOutlet UIButton *combinevalue;
IBOutlet UITextField *percentoffinput;
IBOutlet UILabel *discountlabel;
IBOutlet UILabel *finallabel;
}
- (IBAction)calculate:(id)sender;
- (IBAction)backgroundTouched:(id)sender;
- (IBAction)autonext:(id)sender;
iPhone FirstView nib file .m code:
//
// FirstViewController.m
// Price Assist
//
// Created by Dustin Schreiber on 6/15/11.
// Copyright 2011 TheTechSphere.com. All rights reserved.
//
#import "FirstViewController.h"
@implementation FirstViewController
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
}
*/
- (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
{
[percentoffinput release];
percentoffinput = nil;
[discountlabel release];
discountlabel = nil;
[finallabel release];
finallabel = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc
{
[percentoffinput release];
[discountlabel release];
[finallabel release];
[super dealloc];
}
- (IBAction)calculate:(id)sender {
if ([centsinput.text length] == 0){
centsinput.text = @"00";
}
if ([dollarinput.text length] == 0){
dollarinput.text = @"00";
}
if ([percentoffinput.text length] == 0){
percentoffinput.text = @"00";
}
double cDollars = [dollarinput.text doubleValue];
double cCents = [centsinput.text doubleValue];
double percentoff = [percentoffinput.text doubleValue] / 100;
NSString *ccDollars = [[NSNumber numberWithFloat:cDollars] stringValue];
NSString *ccCents = [[NSNumber numberWithFloat:cCents] stringValue];
NSString *placeholder = [NSString stringWithFormat:@"%@.%@", ccDollars, ccCents];
double combined = [placeholder doubleValue];
double discount = combined * percentoff;
NSString *discountholder2 =[NSString stringWithFormat:@"%.2f", discount];
discountlabel.text = discountholder2;
double newprice = (combined - discount);
NSString *str = [NSString stringWithFormat:@"%.2f", newprice];
finallabel.text = str;
dollarinput.text = ccDollars;
centsinput.text = ccCents;
percentoffinput.text = [[NSNumber numberWithFloat:percentoff] stringValue];
}
-(IBAction)backgroundTouched:(id)sender
{
[dollarinput resignFirstResponder];
[centsinput resignFirstResponder];
[percentoffinput resignFirstResponder];
}
- (IBAction)autonext:(id)sender {
if ([centsinput.text length ] >= 2) {
if ([centsinput.text length] > 2) {
centsinput.text = @"";
} else {
//next field
}
}
}
@end
Thanks again! If anyone has any suggestions for my code i’d love to here them! Like I said, I’m new to it and thats the only way i know to do this.
————> If anyone wants, I’ll upload the entire project folder. Just ask. Thank you guys for all the help. i’m a n00b with xcode so i haven’t got it all down yet.
Post some code where you use
finallabeland try to debug your app so you can tell me the line just before the app crashes.Option 2:
Try to set a BreakPoint in malloc_error_break so we can have more info about the error.
In XCode go to Run -> Show -> BreakPoints (or just cmd + option + B). Then double click to add a new symbol (symbolic breakpoint) and type in
malloc_error_breakthen press enter.Now run your app and paste your console text.
UPDATE If you need help http://developer.apple.com/library/mac/#recipes/xcode_help-breakpoint_navigator/articles/adding_a_symbolic_breakpoint.html
Check your connections inside your InterfaceBuilder, you may have it wrong with fianllabel.
Also check your Custom Class -> Class in your iphone XIB in your InterfaseBuilder
UPDATE
Go to Product -> Clean. Then Run.