iOS实现九宫格自动生成视图

@interface UISodokuView : UIScrollView
//基础控件的frame
@property(nonatomic,assign)CGRect itemFrame;
//要添加的控件数量
@property(nonatomic,assign)NSInteger itemsNumber;
//每一行控件数量
@property(nonatomic,assign)NSInteger itemsNumberInOneLine;
//存储控件的array
@property(nonatomic,strong)NSMutableArray *itemsArray;
//scrollView宽度
@property(nonatomic,assign)NSInteger scrollViewWidth;
//scrollView高度
@property(nonatomic,assign)NSInteger scrollViewHeight;

//初始化，但并没有添加控件
-(instancetype)initWithItemFrame:(CGRect)frame andItemsNumber:(NSInteger)itemsNumber andItemsNumberInOneLine:(NSInteger)itemsInOneLine;

@implementation UISodokuView

-(instancetype)initWithItemFrame:(CGRect)frame andItemsNumber:(NSInteger)itemsNumber andItemsNumberInOneLine:(NSInteger)itemsInOneLine{
 self = [super init];
 if (self) {
 //初始化
 _itemsArray = [NSMutableArray array];
 _itemFrame = frame;
 _itemsNumber = itemsNumber;
 _itemsNumberInOneLine = itemsInOneLine;
 self.frame = CGRectZero;
 }
 [self layoutModule];
 return self;
}

-(void)layoutModule{
 //获取item宽高和横向纵向间距
 NSInteger itemWidthGap = _itemFrame.origin.x;
 NSInteger itemHeightGap = _itemFrame.origin.y;
 NSInteger width = _itemFrame.size.width;
 NSInteger height = _itemFrame.size.height;
 
 //容器宽度
 _scrollViewWidth = itemWidthGap * (_itemsNumberInOneLine + 1) + width * _itemsNumberInOneLine;
 
 //总行数
 NSInteger numberOfLines = 0;
 if (_itemsNumber%_itemsNumberInOneLine == 0) {
 numberOfLines = _itemsNumber/_itemsNumberInOneLine;
 }else{
 numberOfLines = _itemsNumber/_itemsNumberInOneLine + 1;
 }
 _scrollViewHeight = itemHeightGap*(numberOfLines + 1) + height*numberOfLines - 2;
 
 //确定scrollView的frame，默认y轴边距200
 self.frame = CGRectMake(0, 200, _scrollViewWidth,height + itemHeightGap*2);
 self.contentSize = CGSizeMake(_scrollViewWidth, _scrollViewHeight);
 self.scrollEnabled = YES;
 self.backgroundColor = [UIColor lightGrayColor];
 
 //创建并添加控件
 NSInteger line = 1;
 NSInteger row = 1;
 
 for (int i = 1;i <= _itemsNumber ; i++) {
 UIView *item = [[UIView alloc] initWithFrame:_itemFrame];
 item.backgroundColor = [UIColor whiteColor];
 [_itemsArray addObject:item];
 [self addSubview:item];
 //判断处于第几行
 line = i/_itemsNumberInOneLine + 1;
 //判断处于第几列
 row = i % _itemsNumberInOneLine;
 if (row == 0) {
 row = _itemsNumberInOneLine;
 line -= 1;
 }
 item.frame = CGRectMake(row*itemWidthGap + (row-1)*width, line*itemHeightGap + (line-1)*height, width, height);
 }
}

UISodokuView * sv = [[UISodokuView alloc] initWithItemFrame:CGRectMake(10, 10, 100, 120) andItemsNumber:10 andItemsNumberInOneLine:3];
 [self.view addSubview:sv];