UINavBarOnMenuItemClick 委托

public delegate void OnMenuItemClick(
	string itemText,
	int menuIndex,
	int pageIndex
)

Public Delegate Sub OnMenuItemClick ( 
	itemText As String,
	menuIndex As Integer,
	pageIndex As Integer
)

type OnMenuItemClick = 
    delegate of 
        itemText : string * 
        menuIndex : int * 
        pageIndex : int -> unit