javascript - 如何自上而下滑动 JQuery 移动

Question

我试图在上下滑动而不是左右滑动时进行事件

如图所示，我有这个卷：

我可以使用箭头图标（onClick（））处理事件，但我想添加向上滑动事件，当添加滑动事件时，它在左右工作我希望它向上，因为图像显示任何帮助？

Answer 1

jQuery Mobile 原生为我们提供了捕捉 swipeleft 和 swiperight 的能力。但是，它并没有为我们提供开箱即用的向上和向下滑动。调整 jQuery 团队为 swipeleft 和 swiperight 所做的工作，我们能够以相同的方式创建和捕获这些事件。看下面的代码来实现swipeup和swipedown：

(function() {
    var supportTouch = $.support.touch,
            scrollEvent = "touchmove scroll",
            touchStartEvent = supportTouch ? "touchstart" : "mousedown",
            touchStopEvent = supportTouch ? "touchend" : "mouseup",
            touchMoveEvent = supportTouch ? "touchmove" : "mousemove";
    $.event.special.swipeupdown = {
        setup: function() {
            var thisObject = this;
            var $this = $(thisObject);
            $this.bind(touchStartEvent, function(event) {
                var data = event.originalEvent.touches ?
                        event.originalEvent.touches[ 0 ] :
                        event,
                        start = {
                            time: (new Date).getTime(),
                            coords: [ data.pageX, data.pageY ],
                            origin: $(event.target)
                        },
                        stop;

                function moveHandler(event) {
                    if (!start) {
                        return;
                    }
                    var data = event.originalEvent.touches ?
                            event.originalEvent.touches[ 0 ] :
                            event;
                    stop = {
                        time: (new Date).getTime(),
                        coords: [ data.pageX, data.pageY ]
                    };

                    // prevent scrolling
                    if (Math.abs(start.coords[1] - stop.coords[1]) > 10) {
                        event.preventDefault();
                    }
                }
                $this
                        .bind(touchMoveEvent, moveHandler)
                        .one(touchStopEvent, function(event) {
                    $this.unbind(touchMoveEvent, moveHandler);
                    if (start && stop) {
                        if (stop.time - start.time < 1000 &&
                                Math.abs(start.coords[1] - stop.coords[1]) > 30 &&
                                Math.abs(start.coords[0] - stop.coords[0]) < 75) {
                            start.origin
                                    .trigger("swipeupdown")
                                    .trigger(start.coords[1] > stop.coords[1] ? "swipeup" : "swipedown");
                        }
                    }
                    start = stop = undefined;
                });
            });
        }
    };
    $.each({
        swipedown: "swipeupdown",
        swipeup: "swipeupdown"
    }, function(event, sourceEvent){
        $.event.special[event] = {
            setup: function(){
                $(this).bind(sourceEvent, $.noop);
            }
        };
    });

})();

这是Blackdynamo的答案

Answer 2

我在这里接受的答案有问题，因为当滑动的起点和目标不同时未检测到滑动。

这里可能是一个更简单的答案，我直接覆盖 jquery handleSwipe 事件（基于 jquery.mobile-1.4.5）并使用垂直滑动附加它，向上和向下调用：

(function( $, window, undefined ) {

    //custom handleSwipe with swiperight, swipeleft, swipeup, swipedown
    $.event.special.swipe.handleSwipe = function( start, stop, thisObject, origTarget ) {
        if ( stop.time - start.time < $.event.special.swipe.durationThreshold ) {
            var horSwipe = Math.abs( start.coords[0] - stop.coords[0] ) > $.event.special.swipe.horizontalDistanceThreshold;
            var verSwipe = Math.abs( start.coords[1] - stop.coords[1] ) > $.event.special.swipe.verticalDistanceThreshold;
            if( horSwipe != verSwipe ) {
                var direction;
                if(horSwipe)
                    direction = start.coords[0] > stop.coords[0] ? "swipeleft" : "swiperight";
                else
                    direction = start.coords[1] > stop.coords[1] ? "swipeup" : "swipedown";
                $.event.trigger($.Event( "swipe", { target: origTarget, swipestart: start, swipestop: stop }), undefined, thisObject);
                $.event.trigger($.Event( direction, { target: origTarget, swipestart: start, swipestop: stop }), undefined, thisObject);
                return true;
            }
            return false;
        }
        return false;
    }

    //do binding
    $.each({
        swipeup: "swipe.up",
        swipedown: "swipe.down"
    }, function( event, sourceEvent ) {
        $.event.special[ event ] = {
            setup: function() {
                $( this ).bind( sourceEvent, $.noop );
            },
            teardown: function() {
                $( this ).unbind( sourceEvent );
            }
        };
    }); 
})( jQuery, this );