/**
* class instance method with dataSource and delegate. you can also create with [[LTxMenuView alloc] init] then set the dataSource and the delegate.
**/
+ (instancetype)instanceWithDataSource:(id <LTxMenuViewDataSource>)dataSource delegate:(id <LTxMenuViewDelegate>)delegate;
/**
* show menuView in viewController from a special position.
* @param viewController the menuview 's container
* @param position the menuview 's arrow direction
**/
- (void)showMenu:(UIViewController*)viewController from:(CGRect)position;
/**
* hide the menuview. usually you did not need to call this method
**/
- (void)dismissMenu;

#pragma mark LTxMenuViewDelegate
@protocol LTxMenuViewDelegate<NSObject>

@optional
/**
* called when a specified index was selected.
**/
-(void)didSelectRowAtIndex:(NSInteger)index;

/**
* called when a specified accessoryView was selected.
**/
-(void)didSelectAccessoryView:(UIView*)accessoryView
atIndex:(NSInteger)index;
@end

#pragma mark LTxMenuViewDataSource
@protocol LTxMenuViewDataSource<NSObject>

@required
/**
* Returns the number of rows
**/
- (NSInteger)numberOfRows;

@optional
/**
* Returns the height of specified index. default value is 50.
**/
- (CGFloat)heightForRowAtIndex:(NSInteger)index;

/**
* Returns the attributedTitle of specified index.
**/
- (NSAttributedString*)attributedTitleForRowAtIndex:(NSInteger)index;

/**
* Returns the image of specified index.
**/
- (UIImage*)imageForRowAtIndex:(NSInteger)index;

/**
* Returns the accessoryViews placed at the end of specified index.
**/
- (NSArray<UIView*>*)accessoryViewsAtIndex:(NSInteger)index;
@end;