swift UICollectionView的使用

之前研究swift，用到了UICollectionView，在此拿出来和大家分享一下。。。

下面是主要代码

/**
     创建collectionView
     */
    func createTypeCollection() {
        let layout = UICollectionViewFlowLayout.init()
        self.typeCollection = UICollectionView.init(frame: CGRectMake(, MAX_HEIGHT(self.toolBtn!), SCREEN_WIDTH, SCREEN_HEIGHT - MAX_HEIGHT(self.toolBtn!)), collectionViewLayout: layout)
        self.typeCollection?.backgroundColor = UIColor.clearColor()
        //注册CollectionViewCell
        self.typeCollection?.registerClass(CollectionViewCell.self, forCellWithReuseIdentifier:"cell")
        //注册headerView
        self.typeCollection?.registerClass(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "cell")
        self.typeCollection?.delegate = self;
        self.typeCollection?.dataSource = self;
        self.view.addSubview(self.typeCollection!)
    }

    /**
     设置组别

     - parameter collectionView:

     - returns: 返回几个组别
     */
    func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
        return self.typeArray.count
    }

    /**
     设置每个组别内的分类数量

     - parameter collectionView:
     - parameter section:        当前组别

     - returns: 返回个数
     */
    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        let dic = self.typeArray[section] as! NSDictionary
        let array = dic["items"] as! Array<String>
        return array.count
    }

    /**
     设置collectionView headerView的高度

     - parameter collectionView:
     - parameter collectionViewLayout:
     - parameter section:              第几个

     - returns: 返回大小
     */
    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize{
        return CGSize.init(width: SCREEN_WIDTH, height: )
    }

    /**
     设置每一个itme的大小

     - parameter collectionView:
     - parameter collectionViewLayout:
     - parameter indexPath:

     - returns: 大小
     */
    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize{
        let dic = self.typeArray[indexPath.section] as! NSDictionary
        let array = dic["items"] as! Array<String>
        let size = getTextRectSize(array[indexPath.row], number: , width: )
        return CGSize.init(width: size.width + , height: )
    }

    /**
     设置上下左右间距

     - parameter collectionView:
     - parameter collectionViewLayout:
     - parameter section:

     - returns: 返回间距
     */
    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets{
        return UIEdgeInsets.init(top: , left: , bottom: , right: )
    }

    /**
     设置headerView

     - parameter collectionView:
     - parameter kind:
     - parameter indexPath:      第几个

     - returns: 返回
     */
    func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView{

        let dic = self.typeArray[indexPath.section] as! NSDictionary

        let headerView = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: "cell", forIndexPath: indexPath)
        for v in headerView.subviews {
            v.removeFromSuperview()
        }
        let headerLabel = UILabel.init(frame: CGRectMake(, , SCREEN_WIDTH, ))
        headerLabel.textColor = BG_COLOR(, g: , b: , a: )
        headerLabel.font = UIFont.init(name: MY_FONT, size: )
        headerLabel.text = dic["title"] as? String
        headerView.addSubview(headerLabel)
        return headerView
    }

    /**
     设置cell显示内容以及复用

     - parameter collectionView:
     - parameter indexPath:

     - returns: 返回cell
     */
    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! CollectionViewCell
        let dic = self.typeArray[indexPath.section] as? NSDictionary
        let array = dic!["items"] as? Array<String>
        let title = array![indexPath.row] as String
        cell.refreshLabel(title)
        if self.selectCellPath == indexPath {
            cell.selectCellType()
        }else{
            cell.cancelSelectCellType()
        }
        return cell
    }

    /**
     选择collectionView cell的方法

     - parameter collectionView:
     - parameter indexPath:
     */
    func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
        self.selectCellPath = indexPath
        self.typeCollection?.reloadData()
    }
    /**
     可以获取上一个选择的cell

     - parameter collectionView:
     - parameter indexPath:
     */
    func collectionView(collectionView: UICollectionView, didDeselectItemAtIndexPath indexPath: NSIndexPath) {
    }
           

下面是设置数据的代码（本地数据）

/**
     创建数据数组
     */
    func createTypeData() {
        self.typeArray = [
            [
                "title":"文学",
                "items":[
                    "小说","漫画","青春文学","随笔","现当代诗","戏剧","传记","古诗词","外国诗歌","艺术","摄影"
                ]
            ],
            [
                "title":"人文社科",
                "items":[
                    "历史","文化","古籍","心理学","哲学/宗教","政治/军事","社会科学","法律"
                ]
            ],
            [
                "title":"生活",
                "items":[
                    "休闲/爱好","孕产/胎教","烹饪/美食","时尚/美妆","旅游/地图","家庭/家居","亲子/家教","两性关系","育儿/早教","保健/养生","体育/运动","手工/DIY"
                ]
            ],
            [
                "title":"经管",
                "items":[
                    "管理","投资","理财","经济"
                ]
            ],
            [
                "title":"科技",
                "items":[
                    "科普读物","建筑","医学","计算机/网络","农业/林业","自然科学","工业技术"
                ]
            ],
            [
                "title":"网络流行",
                "items":[
                    "玄幻/奇幻","武侠/仙侠","都市/职业","历史/军事","游戏/竞技","科幻/灵异","言情"
                ]
            ],

        ]
    }