for (int i = 0; i < 10; i++) {

        for (int j = 1; j < 16; j++) {

            NSButton *btn = [[NSButton alloc]init];

            [btn setButtonType:i];

            [btn setBezelStyle:j];

            btn.title = @"btn";

            [self.view addSubview:btn];

            [btn mas_makeConstraints:^(MASConstraintMaker *make) {

                make.leading.mas_equalTo(i*55 + 150);

                make.width.height.mas_equalTo(44);

            }];

            if (j==1) {

                array = [NSMutableArray array];

                [array addObject:btn];

                [btn mas_makeConstraints:^(MASConstraintMaker *make) {

                    make.top.mas_equalTo(70);

                }];

            }else{

                [array addObject:btn];

                [btn mas_makeConstraints:^(MASConstraintMaker *make) {

                    make.top.mas_equalTo(array[j-2].mas_bottom);

                }];

            }

        }

    }