数组：去重、排序

去重

    NSMutableArray *mArray = [NSMutableArray arrayWithObjects:@"4", @"6", @"5", @"8", @"7", nil];
    ALog(@" ----------0- %@ ", mArray);
    [mArray sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        return [obj1 compare:obj2];
    }];
    ALog(@" ----------1- %@ ", mArray);
    

排序.png