how to remove duplicate value in NSMutableArray

Question

i\'m scanning wifi info using NSMutableArray, but there are few duplicate values appear, so i try to use following code but still getting the duplicate values,

Answer 1

maybe you can try the NSArray category.

#import 

@interface NSArray(filterRepeat)
-(NSArray *)filterRepeat;

@end


#import "NSArray+repeat.h"
@implementation NSArray(filterRepeat)
-(NSArray *)filterRepeat
{
    NSMutableArray * resultArray =[NSMutableArray array];
    [self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        if (![resultArray containsObject: obj]) {
            [resultArray addObject: obj];
        }
    }];
    return resultArray;
}
@end