九宫格布局

for (NSInteger i = 0; i < self.vipModels.count; i++) {
        JQVipModel *model = self.vipModels[i];
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        [btn setTitle:model.vipLevel forState:UIControlStateNormal];
        [btn setTitleColor:[Toolkit getColor:@"b2b2b2"] forState:UIControlStateNormal];
        btn.layer.borderColor = [Toolkit getColor:@"b2b2b2"].CGColor;
        btn.backgroundColor = [Toolkit getColor:@"f6f5f6"];
        btn.layer.borderWidth = 1. / [UIScreen mainScreen].scale;
        btn.titleLabel.adjustsFontSizeToFitWidth = YES;
        btn.tag = kBaseTag + i;
        
        //列
        NSInteger column = 2;
        //行，取天花板值
        NSInteger row = ceil(self.vipModels.count * 1.0 / column);
        CGFloat leftRightMargin = 30 * zxmScale;
        CGFloat topBottomMargin = 30 * zxmScale;
        CGFloat btnMargin = 20 * zxmScale;
        CGFloat btnW = (ScreenWidth_ZXM - leftRightMargin * 2 - btnMargin * (column - 1)) * (1./column);
        CGFloat btnH = 80 * zxmScale;
        
       //关键代码就这两句
        NSInteger rowIndex = i / column;
        NSInteger columnIndex = i % column;
        
        self.levelBtnViewH = (topBottomMargin + btnH) * row + 50 * zxmScale;
        
        btn.frame = CGRectMake(leftRightMargin + (btnW + btnMargin) * columnIndex, topBottomMargin + rowIndex * (btnH + topBottomMargin), btnW, btnH);
        
        [btn addTarget:self action:@selector(selectedBtnClick:) forControlEvents:UIControlEventTouchUpInside];
        
        [self.levelBtns addObject:btn];
        [self.levelBtnView addSubview:btn];
        
        if (i == 0) {
            [self selectedBtnClick:btn];
        }
}