【设计模式】状态模式 - 详解

概念

行为模式

---

类图

---

代码

#include <iostream>
  using namespace std;
  class AudioPlayer
  ;
  class State
  {
  public:
  ~State() = default;
  explicit State(AudioPlayer* audioPlayer) {
  player = audioPlayer;
  }
  virtual void ClickLock() = 0;
  virtual void ClickPlay() = 0;
  virtual void ClickNext() = 0;
  virtual void ClickPrevious() = 0;
  protected:
  AudioPlayer* player;
  };
  class LockedState
  : public State {
  public:
  void ClickLock() override {
  }
  void ClickPlay() override {
  }
  void ClickNext() override {
  }
  void ClickPrevious() override {
  }
  };
  class ReadyState
  : public State {
  };
  class PlayingState
  : public State {
  };
  class AudioPlayer
  {
  public:
  private:
  State* state;
  };
  int main(int argc, char *argv[]) {
  cout <<
  "State pattern needs to be complemented." << endl;
  cout <<
  "One cpp file cannot satisfy." << endl;
  return 0;
  }