UICollectionView 使用

/**
     初始化UICollectionView
     */
    UICollectionViewFlowLayout *flowLayout=[[UICollectionViewFlowLayout alloc] init];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
    flowLayout.minimumLineSpacing = ;
    flowLayout.minimumInteritemSpacing=;

    _deviceCollectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(, , kScreenWidth, kHeightPro()*) collectionViewLayout:flowLayout];

    //设置代理
   _deviceCollectionView.delegate = self;
    _deviceCollectionView.dataSource = self;
    [self.view addSubview:_deviceCollectionView];
    [_deviceCollectionView setBackgroundColor:RGBColor(0xf3, 0xf6, 0xf8)];

    // Register cell classes
    [_deviceCollectionView registerClass:[AnbotDeviceCollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];

#pragma mark －－ <UICollectionViewDataSource>

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return ;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return ;
}

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

    AnbotDeviceCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier  forIndexPath:indexPath];
    [cell sizeToFit];
    if (!cell) {
        NSLog(@"无法创建CollectionViewCell时打印，自定义的cell就不可能进来了。");
    }
    [self configureCell:cell atIndexPath:indexPath];

    return cell;
}

- (void)configureCell:(AnbotDeviceCollectionViewCell *)cell atIndexPath:(NSIndexPath*)indexPath
{

    int index =  indexPath.row *+ indexPath.section;
    cell.section = indexPath.section;
    [cell setEnableImage:UIResourceBundleSubDevice(imageOpenArr[index])];
    [cell setDisableImage:UIResourceBundleSubDevice(imageCloseArr[index])];
   // [cell  setImage:UIResourceBundleSubDevice(imageOpenArr[index])];

    [cell setNameText:titleArr[index]];

    [cell setDeviceNum:[devCountArr[index]integerValue]];
    [cell setNeedsUpdateConstraints];
    [cell updateConstraintsIfNeeded];
}

-(UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
    return UIEdgeInsetsMake(, , , );
}

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

    return CGSizeMake(kScreenWidth/, collectionView.frame.size.height/);
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
   // NSLog(@"cell #%d was selected  %d", indexPath.row,indexPath.section);

    int index =  indexPath.row *+ indexPath.section;
    if ([devCountArr[index] integerValue]==) {
        return;
    }

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@" deviceType == %d ",index];
    NSMutableArray *tempArray = [NSMutableArray arrayWithArray:deviceArr];
    [tempArray filterUsingPredicate:predicate];
    AnbotSingleDeviceManagerVC *singleVC = [[AnbotSingleDeviceManagerVC alloc]init];
    singleVC.index = index; //indexPath.row *2+ indexPath.section;
    singleVC.singleDevArr = tempArray;
   // singleVC.devInfo = deviceArr[index];
    [self.navigationController pushViewController:singleVC animated:YES];

}