Objective-C: Initializing char with char at index of string.

Question

unichar myChar = [myString characterAtIndex:0];
[myNSMutableArray addObject:myChar];

I am trying to insert the first char of a string into an array, to create an array of chars. the first line does not give me an error. The second line however, provides the following error: warning: passing argument 1 of 'addObject:' makes pointer from integer without a cast

This also crashes the application with a "bad address" error. I thought this error was due to a problem with memory allocation. Can someone shed some light on this.

Answer 1

You can only add objects to an array. unichar is a primitive data type. You have to wrap it in an NSNumber. A unichar is an unsigned short, so you can use:

[myNSMutableArray addObject:[NSNumber numberWithUnsignedShort:[myString characterAtIndex:0]]];

Answer 2

One option would be to add the character to your array as a string:

unichar myChar = [myString characterAtIndex:0];
NSString * charString = [NSString stringWithFormat:@"%c", myChar];
[myNSMutableArray addObject:charString];

Note that this is probably overkill.