使用UICollectionView实现简单的拼图游戏，思路就是使用有图的cell与空白的cell进行交换

初始化截图

游戏胜利截图

首先定义model类并实现相应的方法

//初始化
- (instancetype)initWithSerie:(NSInteger)serie;

//一二维转换
- (NSInteger)indexWithPoint:(CGPoint)point;
- (CGPoint)pointWithIndex:(NSInteger)index;

//设置胜利数组
- (void)setWinArr;

//设置游戏数组
- (void)setPlayArr;

//设置空白位置
//- (void)removeNumber:(NSInteger)num;
- (BOOL)isWin;

//交换位置
- (void)changeLocation:(CGPoint)cPoint :(CGPoint)wPoint;

//返回基点
- (CGPoint)upPoint;
- (CGPoint)downPoint;
- (CGPoint)leftPoint;
- (CGPoint)rightPoint;

//判断是否越界
- (BOOL)isUpOut:(CGPoint)point;
- (BOOL)isDownOut:(CGPoint)point;
- (BOOL)isLeftOut:(CGPoint)point;
- (BOOL)isRightOut:(CGPoint)point;

//控制器
- (void)up;
- (void)down;
- (void)left;
- (void)right;
- (void)Key;

Controller代码

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return [self.TextField.text integerValue]*[self.TextField.text integerValue];
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
    
    UIImageView *image = (UIImageView *)[cell viewWithTag:1];
    NSString *str = [NSString stringWithFormat:@"%@", _puz.playArr[indexPath.row]];
    image.image = [UIImage imageNamed:str];
    
    return cell;
}

- (IBAction)TextDidEndOnExit:(id)sender
{
    self.puz = [[puzzle alloc] initWithSerie:[self.TextField.text integerValue]];
    
    [self.CollectionView reloadData];
}

- (IBAction)UpButton:(id)sender
{
    [self.puz up];
    [self.CollectionView reloadData];
}

- (IBAction)DownButton:(id)sender
{
    [self.puz down];
    if ([_puz isWin]) {
        alert(@"恭喜你通关了！", @"ok")
    }
    
    [self.CollectionView reloadData];
}

- (IBAction)LeftButton:(id)sender
{
    [self.puz left];
    [self.CollectionView reloadData];
}

- (IBAction)RightButton:(id)sender
{
    [self.puz right];
    if ([_puz isWin]) {
        alert(@"恭喜你通关了！", @"ok")
    }

    [self.CollectionView reloadData];
}

- (IBAction)KeyButton:(id)sender
{
    [self.puz Key];
    [self.CollectionView reloadData];
    if ([_puz isWin]) {
        alert(@"恭喜你通关了！", @"ok")
    }

}