九宫格

//3列
    NSMutableArray *arr = [NSMutableArray alloc] init];
    int totalloc=3;
    CGFloat appvieww=50;
    CGFloat appviewh=50;
    CGFloat marginx=(kScreenW-totalloc*appvieww)/(totalloc+1);
    CGFloat marginy=30;
    for(int i=0;i<6;i++){
        int row=i/totalloc;//行号
        //1/3=0,2/3=0,3/3=1;
        int loc=i%totalloc;//列号
        CGFloat appviewx=marginx+(marginx+appvieww)*loc;
        CGFloat appviewy=100+(marginy+appviewh)*row;
        UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(appviewx, appviewy, appvieww, appviewh)];
        [btn addTarget:self action:@selector(clickMemberSeleted:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:btn];
        [arr addObject:btn];
    }