第9月第7天 uicollectionview

1.

    /**
     The margins used to lay out content in the section controller.
    
     @see `-[UICollectionViewFlowLayout sectionInset]`.
     */
    open var inset: UIEdgeInsets

    
    /**
     The minimum spacing to use between rows of items.
    
     @see `-[UICollectionViewFlowLayout minimumLineSpacing]`.
     */
    open var minimumLineSpacing: CGFloat

    
    /**
     The minimum spacing to use between items in the same row.
    
     @see `-[UICollectionViewFlowLayout minimumInteritemSpacing]`.
     */
    open var minimumInteritemSpacing: CGFloat





    /**
     Asks the SupplementaryViewSource for a configured supplementary view for the specified kind and index.
    
     @param elementKind The kind of supplementary view being requested
     @param index The index for the supplementary veiw being requested.
    
     @note This is your opportunity to do any supplementary view setup and configuration.
    
     @warning You should never allocate new views in this method. Instead deque a view from the `IGListCollectionContext`.
     */
    @available(iOS 6.0, *)
    public func viewForSupplementaryElement(ofKind elementKind: String, at index: Int) -> UICollectionReusableView

    
    /**
     Asks the SupplementaryViewSource for the size of a supplementary view for the given kind and index path.
    
     @param elementKind The kind of supplementary view.
     @param index The index of the requested view.
    
     @return The size for the supplementary view.
     */
    public func sizeForSupplementaryView(ofKind elementKind: String, at index: Int) -> CGSize

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