iOS 数组（自定义类数组）去重

//去重处理

    NSMutableArray<MATracePoint *> *locations = [NSMutableArray arrayWithArray:record.tracedLocations];

 

    NSMutableArray * tempArr = [NSMutableArray array];

    //BOOL isHave = false;

    for (int i = 0; i < record.tracedLocations.count; i ++) {

        NSMutableArray * arr = [NSMutableArray array];

        [arr addObject:[NSString stringWithFormat:@"%d", i]];

        for (int j = 0; j < record.tracedLocations.count; j ++) {

            if (record.tracedLocations[i].latitude == record.tracedLocations[j].latitude && record.tracedLocations[i].longitude == record.tracedLocations[j].longitude && i != j) {

                //isHave = true;

                NSLog(@"record.tracedLocations[i].latitude = %f,%f,%d", record.tracedLocations[i].latitude,record.tracedLocations[j].latitude,j);

                //[locations addObject:record.tracedLocations[i]];

                [arr addObject:[NSString stringWithFormat:@"%d", j]];

            }

        }

        [tempArr addObject:arr];

    }

 

    NSMutableArray * newArr = [NSMutableArray array];

    for (int i = 0; i < tempArr.count; i ++) {

        NSArray * arr = tempArr[i];

        [newArr addObject:[arr sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {

            float number1 = ((NSString *)obj1).floatValue;

            float number2 = ((NSString *)obj2).floatValue;

            NSComparisonResult result = number1 > number2;

            return result;

        }]];

    }

 

    NSMutableDictionary * realDict = [NSMutableDictionary dictionary];

    for (int i = 0; i < newArr.count; i ++) {

        [realDict setObject:newArr[i] forKey:newArr[i]];

    }

 

    NSMutableArray * realArr = [[NSMutableArray alloc] init];

    for (int i = 0; i < realDict.allKeys.count; i ++) {

 

        [realArr addObject:((NSArray *)realDict.allKeys[i]).firstObject];

    }

 

    NSArray * desArr = [realArr sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {

        float number1 = ((NSString *)obj1).floatValue;

        float number2 = ((NSString *)obj2).floatValue;

        NSComparisonResult result = number1 > number2;

        return result;

    }];

    

    [locations removeAllObjects];

    for (int i = 0; i < desArr.count; i ++) {

        [locations addObject:record.tracedLocations[((NSString *)desArr[i]).intValue]];

    }