【设计模式】状态模式 - 详解

概念

行为模式

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类图

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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;}