页面引入jtopo后，键盘方向键事件无用解决方法

来源：互联网发布：龙神契约披风升阶数据编辑：程序博客网时间：2024/05/22 12:47

在给场景加上搜索功能后，测试发现，输入框的方向键没有用了。。

一检查发现问题出在 jtopo 文件上

ctrl + F 搜索 keyCode 就找到了以下代码

            function m(b) {                a.util.isIE || !window.addEventListener ? (b.onmouseout = f, b.onmouseover = e, b.onmousedown = g, b.onmouseup = h, b.onmousemove = i, b.onclick = j, b.ondblclick = k, b.onmousewheel = l, b.touchstart = g, b.touchmove = i, b.touchend = h) : (b.addEventListener("mouseout", f), b.addEventListener("mouseover", e), b.addEventListener("mousedown", g), b.addEventListener("mouseup", h), b.addEventListener("mousemove", i), b.addEventListener("click", j), b.addEventListener("dblclick", k), a.util.isFirefox ? b.addEventListener("DOMMouseScroll", l) : b.addEventListener("mousewheel", l)),                    window.addEventListener && (window.addEventListener("keydown", function (b) {                        n.dispatchEventToScenes("keydown", a.util.cloneEvent(b));                        var c = b.keyCode;                        (37 == c || 38 == c || 39 == c || 40 == c) && (b.preventDefault ? b.preventDefault() : (b = b || window.event, b.returnValue = !1))                    }, !0),                        window.addEventListener("keyup", function (b) {                            n.dispatchEventToScenes("keyup", a.util.cloneEvent(b));                            var c = b.keyCode;                            (37 == c || 38 == c || 39 == c || 40 == c) && (b.preventDefault ? b.preventDefault() : (b = b || window.event, b.returnValue = !1))                        }, !0))            }

这段代码的大概意思是：

当浏览器为IE或者不存在addEventListener属性在window上时，重新赋值Stage b的事件处理
当浏览器为IE且addEventListener存在时，添加键盘按键事件（大键盘的↑、↓、←、→按键）处理D

然而在非IE浏览器上，方向键也被屏蔽掉了~

            /**             * 当浏览器为IE或者不存在addEventListener属性在window上时             * 重新赋值Stage b的事件处理             * 当浏览器为IE且addEventListener存在时添加键盘按键事件（大键盘的↑、↓、←、→按键）处理D             * keycode 37 = Left             * keycode 38 = Up             * keycode 39 = Right             * keycode 40 = Down             */            function m(b) {                a.util.isIE || !window.addEventListener ? (b.onmouseout = f, b.onmouseover = e, b.onmousedown = g, b.onmouseup = h, b.onmousemove = i, b.onclick = j, b.ondblclick = k, b.onmousewheel = l, b.touchstart = g, b.touchmove = i, b.touchend = h) : (b.addEventListener("mouseout", f), b.addEventListener("mouseover", e), b.addEventListener("mousedown", g), b.addEventListener("mouseup", h), b.addEventListener("mousemove", i), b.addEventListener("click", j), b.addEventListener("dblclick", k), a.util.isFirefox ? b.addEventListener("DOMMouseScroll", l) : b.addEventListener("mousewheel", l)),                    window.addEventListener && (window.addEventListener("keydown", function (b) {                        n.dispatchEventToScenes("keydown", a.util.cloneEvent(b));                        var c = b.keyCode;                        (37 == c || 38 == c || 39 == c || 40 == c) && (b.preventDefault ? b.preventDefault() : (b = b || window.event, b.returnValue = !1))                    }, !0),                        window.addEventListener("keyup", function (b) {                            n.dispatchEventToScenes("keyup", a.util.cloneEvent(b));                            var c = b.keyCode;                            (37 == c || 38 == c || 39 == c || 40 == c) && (b.preventDefault ? b.preventDefault() : (b = b || window.event, b.returnValue = !1))                        }, !0))            }

这时我们只需要屏蔽掉响应的方向键就可以正常使用方向键了

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