How to swap values in NSMutableArray?
Posted
by Harry Pham
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Published on 2010-04-07T04:38:47Z
Indexed on
2010/04/07
4:43 UTC
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This piece of codes segment fault on me, any idea why? allButtons is a NSMutableArray, it contains 3 objects, a=0, b=1, a and b are int type
if(a != -1 && b!= -1){
//Swap index in "allButtons"
id tempA = [allButtons objectAtIndex:a];
id tempB = [allButtons objectAtIndex:b];
[allButtons replaceObjectAtIndex:a withObject:tempB]; //Seg fault here?????
[allButtons replaceObjectAtIndex:b withObject:tempA];
needLoad = false;
[self setUpButtons];
}
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