Cocos Creator 键盘监听事件

键盘事件
键盘、设备重力传感器此类全局事件是通过函数 cc.systemEvent.on(type, callback, target) 注册的。
cc.SystemEvent.EventType.KEY_DOWN (键盘按下)
cc.SystemEvent.EventType.KEY_UP (键盘释放)
cc.SystemEvent.EventType.DEVICEMOTION (设备重力传感)

cc.Class({
extends: cc.Component,
onLoad: function () {
// add key down and key up event
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_UP, this.onKeyUp, this);
},

onDestroy () {
    cc.systemEvent.off(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);
    cc.systemEvent.off(cc.SystemEvent.EventType.KEY_UP, this.onKeyUp, this);
},

onKeyDown: function (event) {
    switch(event.keyCode) {
        case cc.KEY.a:
            console.log('Press a key');
            break;
    }
},

onKeyUp: function (event) {
    switch(event.keyCode) {
        case cc.KEY.a:
            console.log('release a key');
            break;
    }
}

});

cc.Class({
extends: cc.Component,
onLoad () {
// open Accelerometer
cc.inputManager.setAccelerometerEnabled(true);
cc.systemEvent.on(cc.SystemEvent.EventType.DEVICEMOTION, this.onDeviceMotionEvent, this);
},

onDestroy () {
    cc.systemEvent.off(cc.SystemEvent.EventType.DEVICEMOTION, this.onDeviceMotionEvent, this);
},

onDeviceMotionEvent (event) {
    cc.log(event.acc.x + "   " + event.acc.y);
},

});