九宫格代码

      CGFloat margin = 10.0f;

   

    CGFloat appViewWidth = (375 - 4 * margin)/3;

    CGFloat appViewHeight = (375 - 4 * margin)/3;

   

    //2. 完成布局设计

    //三列

    int totalloc = 3;

   

   

    for (int i = 0; i < 9; i++) {

         int row = i / totalloc;//行号

         int loc = i % totalloc;//列号

         CGFloat appViewX = margin + (margin + appViewWidth) * loc;

         CGFloat appViewY = margin + (margin + appViewHeight) * row;

              //创建UIView控件

        UIView *appView = [[UIView alloc] initWithFrame:CGRectMake(appViewX, appViewY, appViewWidth, appViewHeight)];

        appView.backgroundColor = [UIColor redColor];

       

         [self.bgView addSubview:appView];

    }