NSMutableArray addObject: -[__NSArrayI addObject:]: unrecognized selector sent to instance

user_365338 0
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I have tried to initialize my NSMutableArray 100 ways from Sunday, and NOTHING is working for me. I tried setting it equal to a newly allocated and initialized NSMutableArray, just allocating, initializing the variable by itself, every combination I could think of and always the same result.

Here's the code:

Object.h

NSMutableArray *array;

@property (copy) NSMutableArray *array;

Object.m

@synthesize array;

if ( self.array ) {
    [self.array addObject:anObject];
}
else {
    self.array = [NSMutableArray arrayWithObjects:anObject, nil];
}

NOTE: In debug "anObject" is NOT nil at time of execution...

I have tested anObject and it isThe initialization works just fine, but I keep getting the error below when I try to addObject: to self.array.

2010-07-10 11:52:55.499 MyApp[4347:1807] -[__NSArrayI addObject:]: unrecognized selector sent to instance 0x184480

2010-07-10 11:52:55.508 MyApp[4347:1807] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI addObject:]: unrecognized selector sent to instance 0x184480'

Does anyone have any idea what's going wrong?

nsmutablearray iphone
9 Answers

I had similar error saying : unrecognized selector sent to instance for NSMutable array.. After going through a lot of things, I figured out that I was using my mutable array as a property as

@property (assign, nonatomic) NSMutableArray *myMutableArray;

while copy pasting and not paying attention and it was causing the problem.

The solution us that I changed it to strong type(you can change it to any other type like strong/weak,etc.. depending your requirement). So solution in my case was :

@property (strong, nonatomic) NSMutableArray *myMutableArray;

So, be careful while copy pasting! Do check once.

user_14559680
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