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#import "ViewC.h"#import "CLCollectionViewCell.h"#import "HeadView.h"#import "FootView.h"static NSString *cellIdentifier = @"cell";static NSString *headerIdentifier = @"header";static NSString *footerIdentifier = @"footer";@interface ViewC ()<uicollectionviewdatasource, uicollectionviewdelegate,="" uicollectionviewdelegateflowlayout="">@end@implementation ViewC- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self;}- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor lightGrayColor]; UICollectionViewFlowLayout *flowLayout= [[UICollectionViewFlowLayout alloc] init]; flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;//滚动方向 flowLayout.minimumLineSpacing = 10.0;//行间距(最小值) flowLayout.minimumInteritemSpacing = 50.0;//item间距(最小值) flowLayout.itemSize = CGSizeMake(50, 50);//item的大小 flowLayout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);//设置section的边距 flowLayout.headerReferenceSize = CGSizeMake(320, 20); flowLayout.footerReferenceSize = CGSizeMake(320, 20); //第二个参数是cell的布局 UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, 320, 568) collectionViewLayout:flowLayout]; [flowLayout release]; collectionView.dataSource = self; collectionView.delegate = self; collectionView.backgroundColor = [UIColor orangeColor]; //1 注册复用cell(cell的类型和标识符)(可以注册多个复用cell, 一定要保证重用标示符是不一样的)注册到了collectionView的复用池里 [collectionView registerClass:[CLCollectionViewCell class] forCellWithReuseIdentifier:cellIdentifier]; //第一个参数:返回的View类型 //第二个参数:设置View的种类(header, footer) //第三个参数:设置重用标识符 [collectionView registerClass:[HeadView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:headerIdentifier]; [collectionView registerClass:[FootView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:footerIdentifier]; [self.view addSubview:collectionView]; [collectionView release];}- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}#pragma mark - UICollectionViewDataSource- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{ return 10;}- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{ return 10;}- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{ //2 从复用池中找cell(1:cell的标示符 2:indexPath决定系统用不用再给你创建cell, 不用创建的话, 就直接使用之前的cell) CLCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath]; cell.backgroundColor = [UIColor yellowColor]; cell.textLabel.text = [NSString stringWithFormat:@"%ld", (long)indexPath.row]; return cell;}- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{ if (kind == UICollectionElementKindSectionHeader) { HeadView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:headerIdentifier forIndexPath:indexPath]; headerView.textLabel.text = @"让我组成头部!"; headerView.textLabel.textAlignment = NSTextAlignmentCenter; headerView.textLabel.textColor = [UIColor whiteColor]; return headerView; } FootView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:footerIdentifier forIndexPath:indexPath]; footerView.textLabel.text = @"让我组成尾部!"; footerView.textLabel.textAlignment = NSTextAlignmentCenter; footerView.textLabel.textColor = [UIColor whiteColor]; return footerView;}#pragma mark - UICollectionViewDelegate- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{ NSLog(@"%d %d", indexPath.section, indexPath.row);}#pragma mark - UICollectionViewDelegateFlowLayout/*- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{}- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{ }- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{ }- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{ }- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section{ }- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section{ } *//*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{ // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller.}*/@end标签：
原文地址：http://www.cnblogs.com/blogoflzh/p/4725787.html
