ViewController.m#

//
//  ViewController.m
//  UICollectionView
//

//

#import "ViewController.h"
#import "MovieModel.h"
#import "MovieCollectionViewCell.h"

#define MOVIE_URL @"http://project.lanou3g.com/teacher/yihuiyun/lanouproject/movielist.php"
@interface ViewController ()<UICollectionViewDataSource,UICollectionViewDelegate>

@property(nonatomic, strong)UICollectionView *collectionView;

@property(nonatomic, strong)NSMutableDictionary *dataDictionary;

@property(nonatomic, strong)NSMutableArray *dataArray;

@end

@implementation ViewController

NSString *identifier = @"cell";
NSString *headerIdentifer = @"header";
NSString *footerIdentifier = @"footer";


-(void)parserData{
    self.dataDictionary = [NSMutableDictionary dictionary];
    self.dataArray = [NSMutableArray arrayWithCapacity:26];
    
    //1.准备URl
    NSURL *url = [NSURL URLWithString:MOVIE_URL];
    //2.准备session
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    //3.创建session
    NSURLSession *session = [NSURLSession sharedSession];
    //4.创建dataTask
    NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        if (data != nil) {
            
            self.dataDictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
            
           
            
            for (NSMutableDictionary *dic in _dataDictionary[@"result"]) {
                
                MovieModel *MM = [MovieModel new];
                
                [MM setValuesForKeysWithDictionary:dic];
                
         
                [_dataArray addObject:MM];
            }
            NSLog(@"222222%ld",_dataArray.count);
                        for (MovieModel *M in _dataArray) {
                            NSLog(@"%@",M);
                        }
            
        }
            //返回主线程刷新数据
        dispatch_async(dispatch_get_main_queue(), ^{
            
            [self.collectionView reloadData];
        });

        
    }];
    
    //5.执行
    [task resume];

}

 - (void)viewDidLoad {
    [super viewDidLoad];
    
    
    //创建布局对象
    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
    //设置最小行间距
    flowLayout.minimumLineSpacing = 21;
    //设置最小列间距
    flowLayout.minimumInteritemSpacing = 10;
    //设置item大小
    flowLayout.itemSize = CGSizeMake(110, 160);
    //滚动方向
    flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;
    //设置集合视图内边距(顺序:上左下右)
    flowLayout.sectionInset = UIEdgeInsetsMake(20, 20, 20, 20);
    //header区域大小
    flowLayout.headerReferenceSize = CGSizeMake(414, 64);
    //footer区域大小//设置了他们的大小就要把相应的设置设置完,
    flowLayout.footerReferenceSize = CGSizeMake(414, 50);
    //创建UICollectionView之前必须先创建布局对象
    
    _collectionView = [[UICollectionView alloc] initWithFrame:[UIScreen mainScreen].bounds collectionViewLayout:flowLayout];//必须要有布局格式
    // 设置属性
    _collectionView.backgroundColor = [UIColor whiteColor];
    //是否显示水平指示标
    _collectionView.showsVerticalScrollIndicator = NO;
    
    
    _collectionView.delegate = self;
    _collectionView.dataSource = self;

    [self.view addSubview:_collectionView];
    
    //注册cell
    [_collectionView registerClass:[MovieCollectionViewCell class] forCellWithReuseIdentifier:identifier];
    //注册增补视图(相当于tableView的header footer)
      //header
    [_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:headerIdentifer];
      //footer
    [_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:footerIdentifier];
    
    __weak typeof(self)temp = self;
    dispatch_queue_t queue = dispatch_queue_create("GCD", DISPATCH_QUEUE_CONCURRENT);
    dispatch_async(queue, ^{
        
        [temp parserData];
    
    });
     
     
}


//集合视图中section个数
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
    
    return 1;
    
}

//section中返回item个数
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
        NSLog(@"===%ld",_dataArray.count);
    return [_dataArray count];
}

//Cell
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    
    MovieCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
    
    cell.contentView.backgroundColor =[UIColor colorWithRed:arc4random()%256/255.0 green:arc4random()%256/255.0 blue:arc4random()%256/255.0 alpha:1];
    
    MovieModel *mm = _dataArray[indexPath.row];


    cell.model = mm;
    
    return cell;
}



//返回增补视图
-(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
    
    //如果是头视图
    if (kind ==UICollectionElementKindSectionHeader) {
        
        //从重用池里取
        UICollectionReusableView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:headerIdentifer forIndexPath:indexPath];
        headerView.backgroundColor = [UIColor blueColor];
        return headerView;
    }
    //
    if (kind == UICollectionElementKindSectionFooter) {
        //
        UICollectionReusableView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:footerIdentifier forIndexPath:indexPath];
        footerView.backgroundColor = [UIColor blackColor];
        return footerView;
    }
    
    return nil;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

MovieModel.h#

//
//  MovieModel.h
//  豆瓣分组Cinema
//

//

#import <Foundation/Foundation.h>

@interface MovieModel : NSObject

@property(nonatomic, strong)NSString *movieName;
@property(nonatomic, strong)NSString *pic_url;



@property(nonatomic,strong)NSString *movieId;

@property(nonatomic, strong)NSString *poster;//海报
@property(nonatomic,strong)NSString *rating;//评分
@property(nonatomic,strong)NSString *rating_count;//评分人数
@property(nonatomic,strong)NSString *release_date;//放映时间
@property(nonatomic,strong)NSString *runtime;//时长
@property(nonatomic,strong)NSString *genres;//种类
@property(nonatomic,strong)NSString *film_locations;//拍摄地
@property(nonatomic,strong)NSString *plot_simple;//情节
@property(nonatomic,strong)NSString *actors;
@end

MovieModel.m#

//
//  MovieModel.m
//  豆瓣分组Cinema
//
.
//

#import "MovieModel.h"

@implementation MovieModel


-(void)setValue:(id)value forUndefinedKey:(NSString *)key{
//    if ([key isEqualToString:@"pic_url"]) {
//        _imag = value;
//    }
//    
//    if ([key isEqualToString:@"poster"]) {
//        _imag = value;
//    }
    
}


- (NSString *)description
{
    return [NSString stringWithFormat:@"%@", _movieName];
}

@end

MovieCollectionViewCell.h#

//
//  MovieCollectionViewCell.h
//  UI_21_UICollectionView
//

//

#import <UIKit/UIKit.h>
#import "MovieModel.h"
@interface MovieCollectionViewCell : UICollectionViewCell

@property(nonatomic, strong)UIImageView *movieV;

@property(nonatomic, strong)UILabel *moviNameL;

@property(nonatomic, strong)MovieModel *model;
@end

MovieCollectionViewCell.m#

//
//  MovieCollectionViewCell.m
//  UI_21_UICollectionView
//

//

#import "MovieCollectionViewCell.h"
#import "UIImageView+WebCache.h"
@implementation MovieCollectionViewCell


-(instancetype)initWithFrame:(CGRect)frame{
    
    if (self = [super initWithFrame:frame]) {
        
        [self addCustomView];
    }
    
    return self;
}

-(void)addCustomView{
    
    self.movieV = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 110, 140)];
    _movieV.backgroundColor = [UIColor blueColor];
    [self.contentView addSubview:_movieV];
    
    self.moviNameL = [[UILabel alloc] initWithFrame:CGRectMake(0, 140, 110, 20)];
//    _moviNameL.backgroundColor = [UIColor blackColor];
    [self.contentView addSubview:_moviNameL];
 
}

-(void)setModel:(MovieModel *)model{
    
    [self.movieV sd_setImageWithURL:[NSURL URLWithString:model.pic_url] placeholderImage:[UIImage imageNamed:@"11.jpg"] ];
    
    self.moviNameL.text = model.movieName;
    
}

@end