这篇文章主要讲解了jQuery如何实现上拉刷新功能,内容清晰明了,对此有兴趣的小伙伴可以学习一下,相信大家阅读完之后会有帮助。
专注于为中小企业提供网站制作、成都网站设计服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业商水免费做网站提供优质的服务。我们立足成都,凝聚了一批互联网行业人才,有力地推动了1000多家企业的稳健成长,帮助中小企业通过网站建设实现规模扩充和转变。
技术要点:
1、jQuery的插件写法
2、上拉刷新步骤分解
3、css样式
jQuery的插件写法:
$.fn.pluginName = function() { return this.each(function () { fn(); }) };
上拉刷新步骤分解:
上拉刷新可以分解成三个部分:一是开始(start),记录当前鼠标的位置;二是移动(move),根据下拉的位移响应不同的视图;三是结束(end),刷新页面。
;!function ($) { "use strict"; var PTR = function (ele) { this.container = $(ele); this.container.addClass('pull-to-refresh'); this.distance = 60; // 设置参考的下拉位移 this.attachEvent(); }; // 判断是否有touch事件发生 var isTouch = (function () { var isSupportTouch = !!'ontouchstart' in document || window.documentTouch; return isSupportTouch; })(); var touchEvents = { start: isTouch ? 'touchstart': 'mousedown', move: isTouch ? 'touchmove':'mousemove', end: isTouch ? 'touchend': 'mouseup' }; // 获取事件发生时相对于文档的距离(含滚动距离) function getTouchPosition(e) { var e = e.orinalEvent || e; console.log(e) if(e.type === 'touchstart' || e.type === 'touchmove' || e.type === 'touchend') { return { x: e.targetTouches[0].pageX, y: e.targetTouches[0].pageY } }else { return { x: e.pageX, y: e.pageY } } }; PTR.prototype.touchStart = function (e) { var p = getTouchPosition(e); this.start = p; this.diffX = this.diffY = 0; }; PTR.prototype.touchMove = function (e) { if(this.container.hasClass('refreshing')) return; if(!this.start) return false; var p = getTouchPosition(e); this.diffX = p.x - this.start.x; this.diffY = p.y - this.start.y; if(this.diffY < 0) return; this.container.addClass('touching'); e.preventDefault(); e.stopPropagation(); // 设置container的位移小于页面滚动的距离,给人一种用力下拉的错觉,提升用户体验 this.diffY = Math.pow(this.diffY, .8); this.container.css('transform', 'translate3d(0,'+ this.diffY +'px, 0)'); if(this.diffY < this.distance) { this.container.removeClass('pull-up').addClass('pull-down') }else { this.container.removeClass('pull-down').addClass('pull-up') } }; PTR.prototype.touchEnd = function (e) { var _this = this; this.start = false; this.container.removeClass('pull-down'); this.container.removeClass('pull-up'); this.container.removeClass('touching'); this.container.css('transform',''); if(this.diffY >= this.distance) { this.container.addClass('refreshing'); this.container.trigger('pull-to-refresh') } }; // 事件处理程序,通过$.proxy(fn, content)绑定执行函数的上下文。 PTR.prototype.attachEvent = function () { var ele = this.container; ele.on(touchEvents.start, $.proxy(this.touchStart, this)); ele.on(touchEvents.move, $.proxy(this.touchMove, this)); ele.on(touchEvents.end, $.proxy(this.touchEnd, this)); }; // 实例化构造函数 var pullToRefresh = function (ele) { new PTR(ele) }; var pullToRefreshDone = function (ele) { $(ele).removeClass('refreshing'); }; // jQuery 插件编写的一般模式 $.fn.pullToRefresh = function () { // return 是插件可链式调用 // this 在这里是一个jQuery对象,相当于$(ele)。因为在即时执行函数作用域中,没必要用“$(this)”的方式来把this包裹到一个jQuery对象中,因为this本身已经是被包装好的jQuery对象。 // this.each()使插件代码为多元素集合中的每个元素单独起作用 return this.each(function () { pullToRefresh(this); }) }; $.fn.pullToRefreshDone = function () { return this.each(function () { pullToRefreshDone(this); }) } }(window.jQuery);
HTML代码如下:
Title ↓下拉刷新释放刷新正在刷新Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus amet aperiam, architecto at aut beatae dignissimos eaque est ex fugi at incidunt inventore natus nemo nostru m omnis quos repellat ut voluptas!
CSS代码如下:
.pull-to-refresh { margin-top: -50px; transition: transform .4s; } .pull-to-refresh .pull-to-refresh-preloader, .pull-to-refresh .up, .pull-to-refresh .refresh { display: none; } .pull-to-refresh.refreshing { transform: translate3d(0,50px,0); } .refreshing .pull-to-refresh-arrow, .refreshing .down, .refreshing .up { display: none; } .refreshing .refresh, .refreshing .pull-to-refresh-preloader { display: inline-block; } .pull-to-refresh_layer { height: 30px; line-height: 30px; padding-bottom: 10px; } .pull-down .pull-to-refresh_layer .up, .pull-down .pull-to-refresh_layer .refresh { display: none; } .pull-down .pull-to-refresh_layer .down{ display: inline-block; } .pull-up .pull-to-refresh_layer .up{ display: inline-block; } .pull-up .pull-to-refresh_layer .down, .pull-up .pull-to-refresh_layer .refresh { display: none; } .pull-up .pull-to-refresh-arrow { transform: rotate(180deg) translate3d(0, 0, 0); } .pull-to-refresh-arrow { display: inline-block; z-index: 10; margin-right: 4px; transition-duration: 300ms; transform: rotate(0deg) translate3d(0, 0, 0); } .pull-to-refresh_layer { display: inline-block; } .pull-to-refresh-preloader { display: inline-block; } .pull-down { } .pull-up { } .down { display: inline-block; } .up { display: inline-block; } .refresh { display: inline-block; }
看完上述内容,是不是对jQuery如何实现上拉刷新功能有进一步的了解,如果还想学习更多内容,欢迎关注创新互联行业资讯频道。
新闻名称:jQuery如何实现上拉刷新功能
本文路径:http://scgulin.cn/article/gcjccs.html