设计模式-状态模式

设计模式-状态模式

设计模式

状态模式的关键是区分事物内部的状态

// OffLightState：
var OffLightState = function (light) {
    this.light = light;
};
OffLightState.prototype.buttonWasPressed = function () {
    console.log('弱光'); // offLightState对应的行为   
    this.light.setState(this.light.weakLightState); // 切换状态到weakLightState
};
//WeakLightState
var WeakLightState = function (light) {
    this.light = light;
};
WeakLightState.prototype.buttonWasPressed = function () {
    console.log('强光');
    // weakLightState对应的行为    
    this.light.setState(this.light.strongLightState); // 切换状态到strongLightState
};
// StrongLightState：
var StrongLightState = function (light) {
    this.light = light;
};
StrongLightState.prototype.buttonWasPressed = function () {
    console.log('关灯');
    // strongLightState对应的行为    
    this.light.setState(this.light.offLightState); // 切换状态到offLightState
};