NSMutablearray define init issue

Question

i have the following line of code

NSMutableArray *marray = [[NSArray arrayWithObjects: @"4", @"1", @"9", nil]mutableCopy];

and i want to replace it with the following line

NSMutableArray  *marray = [[NSMutableArray alloc]initWithArray:garr];

where garr is global array from global method

the problem is that the code works fine when calling the first line but when using the second one the code crash , appreciate ur help and ideas thanks , iknow that the first one is NSArray but the garr variable source is NSMutable array here is the code for garr

     garr = [[NSMutableArray alloc]init];
    for (int x = 0; x < 10; x++) {
        [garr addObject:[NSNumber numberWithInt: arc4random()%200]];

here is the error msg console error:2012-09-02 14:46:42.976 sort_alg[1561:207] -[NSCFNumber UTF8String]: unrecognized selector sent to instance 0x4b1a170 2012-09-02 14:46:42.978 sort_alg[1561:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFNumber UTF8String]: unrecognized selector sent to instance 0x4b1a170' * Call stack at first throw: –

this is the code that generates the end value

NSString *element; 
NSEnumerator *iterator = [marray objectEnumerator];
while ((element = [iterator nextObject]) != nil)
printf("%s ", [element UTF8String]);
printf("\n");
[marray release];   // array needs to be released! 
[pool release];

thanks

Your first array contains strings, the second one numbers. It looks like some other code that you're not showing here, expects the array to still contain strings... — omz
– omz, Commented Sep 2, 2012 at 11:49
@OracleOracle: Please update your question, don't paste the error message in the comment. — nhahtdh
– nhahtdh, Commented Sep 2, 2012 at 11:49

Cyrille · Accepted Answer · 2012-09-02 12:02:26Z

2

Problem lies in printf("%s ", [element UTF8String]);.

NSNumber has no UTF8String method, only a stringValue. You can't printf it either, but you can NSLog("%@", [element stringValue]), or NSLog("%d", [element intValue]) if you know it's an int.

answered Sep 2, 2012 at 12:02

Cyrille

25.1k12 gold badges69 silver badges90 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Cyrille Over a year ago

By the way, instead of going all the way to instanciating an enumerator, you can just use fast enumeration: for (NSNumber *num in marray) { NSLog("%@", [num stringValue]); }.

HelmiB Over a year ago

don't use equal '=' for comparison of objets. use isEqual:

user529758 Over a year ago

Hey, you could printf("%s", [[element stringValue] UTF8String]);

Oracle Oracle Over a year ago

All went fine many thanks the issue is with the NSstring and Nsnumber with thanks

Collectives™ on Stack Overflow

NSMutablearray define init issue

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related