iOS 利用for循环创建九宫格

 1 // 利用for循环创建九宫格
 2 - (void)createScratchableLatex{
 3 
 4     //    总列数
 5     int totalColumns = 3;
 6     //    每一格的尺寸
 7     CGFloat cellW = (self.frame.size.width-40)/totalColumns;
 8     CGFloat cellH = 20;
 9     //    竖直间隙
10     CGFloat verticalMargin = 10;
11     //    水平间隙
12     CGFloat transverseMargin = 5;
13     
14     //    根据格子个数创建对应的框框
15     for(int index = 0; index< 9; index++) {
16         UIView *cellView = [[UIView alloc ]init ];
17         cellView.backgroundColor = [UIColor redColor];
18         int row = index / totalColumns;
19         int col = index % totalColumns;
20         CGFloat cellX = verticalMargin + col * (cellW + verticalMargin);
21         CGFloat cellY = row * (cellH + transverseMargin);
22         cellView.frame = CGRectMake(cellX, cellY, cellW, cellH);
23         [self addSubview:cellView];
24       
25     }
26 
27 }