gistfile1.m

-(void)bubbleSortArray:(NSMutableArray*)unsortedArray{

    while (TRUE) {
        
        BOOL hasSwapped = NO;
        
        for (int i=0; i<unsortedArray.count; i++){
            
            /** out of bounds check */
            if (i < unsortedArray.count-1){
            
                NSUInteger currentIndexValue = [unsortedArray[i] intValue];
                NSUInteger nextIndexValue    = [unsortedArray[i+1] intValue];
                
                if (currentIndexValue > nextIndexValue){
                    hasSwapped = YES;
                    [self swapFirstIndex:i withSecondIndex:i+1 inMutableArray:unsortedArray];
                }
            }
            
        }
        
        /** already sorted, break out of the while loop */
        if (!hasSwapped){
            break;
        }
        
    }
    
    
    NSLog(@"sorted array is %@",unsortedArray);
    
}

-(void)swapFirstIndex:(NSUInteger)firstIndex withSecondIndex:(NSUInteger)secondIndex inMutableArray:(NSMutableArray*)array{
    
    NSNumber* valueAtFirstIndex = array[firstIndex];
    NSNumber* valueAtSecondIndex = array[secondIndex];
    
    [array replaceObjectAtIndex:firstIndex withObject:valueAtSecondIndex];
    [array replaceObjectAtIndex:secondIndex withObject:valueAtFirstIndex];
}