CGFloat bookViewW = 100;
CGFloat bookViewH = 140;
//(屏幕的宽度 - 一个小块的宽度 * 总的列数) / (总的列数 + 1)
int totalColum = 3;
int totalRow = 4;
CGFloat marginX = (self.view.frame.size.width - bookViewW * totalColum) / (totalColum + 1);
CGFloat marginY = (self.view.frame.size.height - bookViewH * totalRow) / (totalRow + 1);
NSLog(@"mX %f,mY %f",marginX,marginY);
for(int i = 0; i < 12; i++){
1.创建一个视图作为容器
UIView * bookView = [[UIView alloc] init];
2.建立父子关系,如果一个视图想要正确的显示在界面上,只要与一个已经显示在页面的视图建立父子关系就可以
与控制器管理的默认视图,建立父子关系
[self.view addSubview:bookView];
//行
0,1,2 —>0
3,4,5 ->1
int row=i/totalColum
//列
0,3,6 ->0
1,4,7 ->1
2,5,8 ->2
int col=i/totalRow
//计算当前i 值所处在的列
CGFloat currentColum = i % totalColum;// 0 - 2
//计算当前i 值所处在的行
CGFloat currentRow = i / totalColum;//0 - 3;
CGFloat bookViewX = marginX + (marginX + bookViewW) * currentColum;
CGFloat bookViewY = marginY + (marginY + bookViewH) * currentRow;
3.设置正确的Frame
bookView.frame = CGRectMake(bookViewX, bookViewY, bookViewW, bookViewH);
bookView.backgroundColor = [UIColor redColor];