// 初始化其实只要一句话的
self.trelloView = [[TrelloView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, ScreenWidth, ScreenHeight) dataSource:self];

[self.view addSubview:_trelloView];

/**
 *  Return how many boards that you are going to display
 *
 *  @param trelloView target trelloView
 *
 *  @return NSInteger
 */
- (NSInteger)numberForBoardsInTrelloView:(TrelloView *)trelloView;

/**
 *  Return how many rows each board is going to display
 *
 *  @param trelloView target trelloView
 *  @param index      index of the target trelloView
 *
 *  @return NSInteger
 */
- (NSInteger)numberForRowsInTrelloView:(TrelloView *)trelloView atBoardIndex:(NSInteger)index;

/**
 *  Return the item that each row in each board is going to display. 
 *  You can extend the TrelloListCellItem model to whatever you want, just customizing your own cell in table view datasource
 *  Enjoy yourself :)
 *
 *  @param trelloView target trelloView
 *  @param index      index of the target trelloView
 *  @param rowIndex   index of the target row
 *
 *  @return TrelloListCellItem
 */
- (TrelloListCellItem *)itemForRowsInTrelloView:(TrelloView *)trelloView atBoardIndex:(NSInteger)index atRowIndex:(NSInteger)rowIndex;

/**
 *  Return title of each board
 *
 *  @param trelloView target trelloView
 *  @param index      index of the target trelloView
 *
 *  @return NSInteger
 */
- (NSString *)titleForBoardsInTrelloView:(TrelloView *)trelloView atBoardIndex:(NSInteger)index;

/**
 *  Return the level of each board
 *
 *  @param trelloView target trelloView
 *  @param index      index of the target trelloView
 *
 *  @return SCTrelloBoardLevel
 */
- (SCTrelloBoardLevel)levelForRowsInTrelloView:(TrelloView *)trelloView atBoardIndex:(NSInteger)index;