SHICollectionController.h

//
//  ViewController.h
//  collectionView
//
//  Created by tomyAmi on 2014/10/11.
//  Copyright (c) 2014年 tomyAmi. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface collectionController : UIViewController
@end

SHICollectionController.m

82 lines (63 sloc)  2.04 KB
//
//  ViewController.m
//  collectionView
//
//  Created by tomyAmi on 2014/10/11.
//  Copyright (c) 2014年 tomyAmi. All rights reserved.
//

#import "ViewController.h"

@interface ViewController : UIViewController<UICollectionViewDataSource,UICollectionViewDelegate>
@end

UICollectionView *_main;

@implementation ViewController

- (void)viewDidLoad {
    
    [super viewDidLoad];
    int wid=self.view.frame.size.width;
    /**
     *  コレクションビューのレイアウト
     */
    UICollectionViewFlowLayout *rayout=[[UICollectionViewFlowLayout alloc]init];
    rayout.minimumInteritemSpacing=2.0f;
    rayout.minimumLineSpacing=2.0f;
    rayout.itemSize=CGSizeMake(wid/3-2.0f, wid/3-2.0f);
    /**
     *  コレクション
     */
    _main=[[UICollectionView alloc]initWithFrame:CGRectMake(0, 44, self.view.frame.size.width, (self.view.frame.size.height)-44) collectionViewLayout:rayout];
    _main.delegate=self;
    _main.dataSource=self;
    [_main registerClass:[UICollectionViewCell class]forCellWithReuseIdentifier:@"UICollectionViewCell"];
    [self.view addSubview:_main];

    // Do any additional setup after loading the view, typically from a nib.
}

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

/**
 *  セルの数
 *
 *  @param collectionView
 *  @param section
 *
 *  @return
 */
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    return 100;
}


/**
 *  セルを返す
 *
 *  @param collectionView
 *  @param indexPath
 *
 *  @return
 */
-(UICollectionViewCell*)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{

    NSString *cellId=@"UICollectionViewCell";
    UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:cellId forIndexPath:indexPath];
    
    UIImageView *celImage =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"beauty.jpg"]];
    
    cell.backgroundView = celImage;
    
    return cell;
}

add header file