网格视图

<UICollectionViewDelegate,UICollectionViewDataSource>{

    UICollectionView *collectionV;

}//创建一个布局对象

    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];

    //设置单元格大小

    flowLayout.itemSize=CGSizeMake(100,100);

    flowLayout.sectionInset=UIEdgeInsetsMake(80,10,0,10);

    flowLayout.minimumInteritemSpacing = 20;

    flowLayout.minimumLineSpacing=20;

    collectionV = [[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:flowLayout];

    collectionV.delegate = self;

    collectionV.dataSource = self;

    collectionV.backgroundColor = [UIColor cyanColor];

    [collectionV registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:ID];

    [self.view addSubview:collectionV];

}

//数据源方法

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView*)collectionView{

    return 5;

}

-(NSInteger)collectionView:(UICollectionView*)collectionView numberOfItemsInSection:(NSInteger)section{

    return 7;

}

//设置cell

-(UICollectionViewCell*)collectionView:(UICollectionView*)collectionView cellForItemAtIndexPath:(NSIndexPath*)indexPath{

    //根据可重用标识符查找cell

    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:ID forIndexPath:indexPath];

    cell.backgroundColor= [UIColorpurpleColor];

cell.imgView.image= [UIImageimageNamed:@"9"];

    cell.layer.borderWidth = 1;

    returncell;

}

定义自定义网格视图

.h@property (nonatomic,strong) UIImageView *imgView;

- (instancetype)initWithFrame:(CGRect)frame

{

    self= [superinitWithFrame:frame];

    if(self) {

        [selfaddSubview:self.imgView];

    }

    return self;

}

// 重写 GET 方法

- (UIImageView*)imgView

{

    if (!_imgView)

    {

        _imgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];

    }

    return _imgView;

}