n行n列的算法

int x=0;
        int y=0;
        for(int i=1;i<=100;i++){
            UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
            [btn setBackgroundColor:[UIColor whiteColor]];
            [btn setFrame:CGRectMake(x*33, y*33, 24, 24)];
            [btn setTitle:[NSString stringWithFormat:@"%d",i] forState:UIControlStateNormal];
            [sv addSubview:btn];
            [self.view addSubview:sv];
            x++;
            if(i%10 == 0){
                x=0;
                y++;
            }
        }

转载于:https://my.oschina.net/u/564793/blog/360124