自定义网格cell

#import "ViewController.h"

#import "CollectionViewCell.h"

// 主屏的宽度

#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width

// 主屏的高度

#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height

@interface ViewController ()<UICollectionViewDelegate , UICollectionViewDataSource>

@property (nonatomic , strong) UICollectionView *collectionView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    //背景颜色

    self.view.backgroundColor = [UIColor whiteColor];

    //导航条颜色

    self.navigationController.navigationBar.barTintColor = [UIColor colorWithRed:251/255.0 green:183/255.0 blue:40/255.0 alpha:1];

    //导航标题

    UILabel*navLab = [[UILabelalloc]initWithFrame:CGRectMake((SCREEN_WIDTH-60)/2,10,60,30)];

    navLab.text=@"采煤机专项闯关";

    navLab.textColor= [UIColorwhiteColor];

    navLab.font= [UIFontsystemFontOfSize:18];

    self.navigationItem.titleView = navLab;

    //网格布局 网格创建

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

    [flowLayoutsetScrollDirection:UICollectionViewScrollDirectionVertical];

    //间距

    flowLayout.minimumLineSpacing=32;

    flowLayout.minimumInteritemSpacing = 42;

    //设置CollectionView的属性

    self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(26, 86, SCREEN_WIDTH-26*2, SCREEN_HEIGHT-22) collectionViewLayout:flowLayout];

    self.collectionView.delegate = self;

    self.collectionView.dataSource = self;

    //背景颜色为红色

    self.collectionView.backgroundColor = [UIColor whiteColor];

    [self.view addSubview:self.collectionView];

    //注册Cell

    [self.collectionView registerNib:[UINib nibWithNibName:@"CollectionViewCell" bundle:[NSBundle mainBundle]] forCellWithReuseIdentifier:@"cell"];

}

#pragma mark  设置CollectionView每组所包含的个数

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

{

    return 16;

}

#pragma mark  设置CollectionCell的内容

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

{

    staticNSString*identify =@"cell";

    CollectionViewCell*cell = [collectionViewdequeueReusableCellWithReuseIdentifier:identifyforIndexPath:indexPath];

    cell.backgroundColor= [UIColorwhiteColor];

    returncell;

}

//每个单元格的大小size

- (CGSize)collectionView:(UICollectionView*)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath*)indexPath

{

    return CGSizeMake(49 ,69);

}