UICollectionViewFlowLayout *flowLayout= [[UICollectionViewFlowLayout alloc] init]; flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;//滾動方向 flowLayout.minimumLineSpacing = 10.0;//行間距(最小值) flowLayout.minimumInteritemSpacing = 50.0;//item間距(最小值) flowLayout.itemSize = CGSizeMake(50, 50);//item的大小 flowLayout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);//設置section的邊距 flowLayout.headerReferenceSize = CGSizeMake(320, 20); flowLayout.footerReferenceSize = CGSizeMake(320, 20); //第二個參數是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 注冊復用cell(cell的類型和標識符)(可以注冊多個復用cell, 一定要保證重用標示符是不一樣的)注冊到了collectionView的復用池里 [collectionView registerClass:[CLCollectionViewCell class] forCellWithReuseIdentifier:cellIdentifier]; //第一個參數:返回的View類型 //第二個參數:設置View的種類(header, footer) //第三個參數:設置重用標識符 [collectionView registerClass:[HeadView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:headerIdentifier]; [collectionView registerClass:[FootView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:footerIdentifier]; [self.view addSubview:collectionView];#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 從復用池中找cell(1:cell的標示符 2:indexPath決定系統用不用再給你創建cell, 不用創建的話, 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 = @"讓我組成頭部!"; headerView.textLabel.textAlignment = NSTextAlignmentCenter; headerView.textLabel.textColor = [UIColor whiteColor]; return headerView; } FootView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:footerIdentifier forIndexPath:indexPath]; footerView.textLabel.text = @"讓我組成尾部!"; 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{ } */ [collectionView registerClass:[FootView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:footerIdentifier]; [self.view addSubview:collectionView];新聞熱點
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