iPhone simulator app crashes when appending a string

Posted by Franklyn Weber on Stack Overflow See other posts from Stack Overflow or by Franklyn Weber
Published on 2010-05-03T22:22:26Z Indexed on 2010/05/03 22:28 UTC
Read the original article Hit count: 227

Filed under:

objective-c

|

nsstring

|

crash

Hi,

I'm a complete novice, so I'm probably missing something really easy, but I can't get my string appending to work. I add the 3rd character to typedDigit & it crashes - the method is called fine and typedDigit will get to 2 characters long. I think everything is declared properly in the header file. Code is -

-(IBAction)digitPressed:(UIButton *)sender {

    NSString *digit = [[sender titleLabel] text]; // in this case, "0" - "9"

    if (userIsInMiddleOfTyping) {   // typedDigit is already at least 1 character long
        typedDigit = [typedDigit stringByAppendingString:digit];
    } else {                        // first character of typedDigit
        typedDigit = digit;
        userIsInMiddleOfTyping = YES;
    }

}

Many thanks for any help!

© Stack Overflow or respective owner

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

as seen on Stack Overflow - Search for 'Stack Overflow'
I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I… >>> More
Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code… >>> More
Add an objective @property attribute in objective-c

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation? Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their… >>> More
ObjectiveC Syntax for Specifying Protocol Name in Method Argument

as seen on Stack Overflow - Search for 'Stack Overflow'
What's the ObjectiveC syntax for specifying a protocol as an argument in a method? Say I have 2 protocols, MyProtocol and MyProtocolCB: @protocol MyProtocolCB <NSObject> - (void) func; @end @protocol MyProtocol <NSObject> - (void) register:(MyProtocolCB*) cb; @end I'm receiving this… >>> More
ObjectiveC builtin template system ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an iPhone application and I use HTML to display formatted text. I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values. I wonder if ObjectiveC has a template system similar to ERB in Ruby. That… >>> More

Related posts about nsstring

Encoded nsstring becomes invalid, "normal" nsstring remains

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm running into a problem with a string that contains encoded characters. Specifically, if the string has encoded characters it eventually becomes invalid while a "normal" string will not. in the .h file: @interface DirViewController : TTThumbsViewController <UIActionSheetDelegate,UINavigationControllerDelegate… >>> More
NSString drawAtPoint Crash on the iPhone (NSString drawAtPoint)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey. I have a very simple text output to buffer system which will crash randomly. It will be fine for DAYS, then sometimes it'll crash a few times in a few minutes. The callstack is almost exactly the same for other guys who use higher level controls: http://discussions.apple.com/thread.jspa?messageID=7949746 http://stackoverflow… >>> More
NSMutableArray to NSString and Passing NSString to Another View IOS5.1

as seen on Stack Overflow - Search for 'Stack Overflow'
I have an NSMutableArray of names. I want the pass the data (selected name) inside of NSMutableArray as text to another view's label. FriendsController.m: - (void)viewDidLoad { [super viewDidLoad]; arrayOfNames=[[NSMutableArray alloc] init]; arrayOfIDs=[[NSMutableArray alloc] init]; … >>> More
Where is my object allocation and memory leak in this iPhone/objective C code?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I'm still a rookie when it comes to this programming gig and was wondering if someone could help me smooth out this code. Functionally, the code works great and does what I need it to do. But when I run the performance tool the allocation graph peaks, the CPU load is high, there's a leak(s)… >>> More
Adding Custom Object to NSMutableArray

as seen on Stack Overflow - Search for 'Stack Overflow'
Developing ios app. I have an object class Product.h and .m respectively along with my picker class which implements my vehicle selection to match products to vehicle. The files product.h #import <Foundation/Foundation.h> @interface Product : NSObject { } @property (nonatomic, retain)… >>> More