public Player(FootBall b, string playerName)
{
ball = b;
myName = playerName;
}
/// <summary>
/// 【观察者模式】
///
/// 足球（Ball）解决求和球员的问题及当球的位置变化，所有的球员和裁判应当能够立即感知。
/// </summary>
static void observers()
{
var ball = new FootBall();
////'Create few players (i.e, ConcreteObservers)
var Owen = new Player(ball, "Owen");
var Ronaldo = new Player(ball, "Ronaldo");
var Rivaldo = new Player(ball, "Rivaldo");
////'Create few referees (i.e, ConcreteObservers)
var Mike = new Referee(ball, "Mike");
var John = new Referee(ball, "John");
////'Attach the observers with the ball
ball.AttachObserver(Owen);
ball.AttachObserver(Ronaldo);
ball.AttachObserver(Rivaldo);
ball.AttachObserver(Mike);
ball.AttachObserver(John);
System.Console.WriteLine("After attaching the observers...");
////'Update the position of the ball.
////'At this point, all the observers should be notified automatically
ball.SetBallPosition(new Position());
////'Just write a blank line
System.Console.WriteLine();
////'Remove some observers
ball.DetachObserver(Owen);
ball.DetachObserver(John);
System.Console.WriteLine("After detaching Owen and John...");
////'Updating the position of ball again
////'At this point, all the observers should be notified automatically
ball.SetBallPosition(new Position(10, 10, 30));
////'Press any key to continue..
}
public Referee(FootBall b, String playerName)
{
ball = b;
myName = playerName;
}
public Player(FootBall b, string playerName)
{
ball = b;
myName = playerName;
}
public Referee(FootBall b, String playerName)
{
ball = b;
myName = playerName;
}