Posted in Javascript onJanuary 18, 2016
AngularJs被用来开发单页面应用程序(SPA),利用AJAX调用配合页面的局部刷新,可以减少页面跳转,从而获得更好的用户体验。Angular的ngView及其对应的强大路由机制,是实现SPA应用的核心模块。本文所说的页面切换指的就是这个路由机制,即根据不同的url展示不同的视图。
前端开发中,为了对列表项进行快捷操作,有时就添个按钮来简单实现。但是,有时会发现按钮影响美观,甚至影响列表行的布局。稍在网上搜索无果,而写此仿苹果滑屏删除控件。
依赖项:angularJS、jQuery
测试浏览器:Chrome、IE11、手机浏览器
原先列表项代码:
<div class="row-class" ng-repeat="item in list"> 这是整行显示的内容 </div>
开发目标:
<div class="row-class" ng-repeat="item in list" slide-delete text="删除" ondelete="ondelete(item)"> 这是整行显示的内容 </div>
首先,要写个angular指令:
myapp.directive('slideDelete', function() { return { restrict: 'AE', scope: { text: "@", ondelete: "&" }, link: function (scope, element, attrs) { var w = $(element).outerWidth ();//应显示的宽度 var h = $(element).outerHeight();//应显示的高度 //按钮宽度 var btn_w = 60; //设计按钮: scope.btn = $('<div style="position:absolute;z-index:5998;right:0;top:0;width:'+btn_w+'px;height:'+h+'px;color:#fff;background-color:#900;text-align:center;padding-top:10px">'+(scope.text||'删除')+'</div>'); //改造行,用一个绝对定位div将内容包裹起来 $(element).contents().wrapAll('<div new_box style="position:absolute;z-index:5999;left:0;top:0;width:'+w+'px;height:'+h+'px;background-color:#fff;"></div>'); //添加按钮: $(element).css({overflow:"hidden", position:"relative", "z-index":5999}).append(scope.btn) //滑屏功能 .slideable({ getLeft: function(self){return self.children(":first-child").position().left;}, setLeft: function(self, x){ self.children(":first-child").css({left: x<-btn_w && -btn_w || x<0 && x || 0});}, onslide: function(self, x){ scope.open = x < -btn_w / 2; self.css("z-index", scope.open && 6001 || 5999); //背景,点击收起 var bk = $.fixedBackground(6000, scope.open); scope.open && bk.data("self", self).click(function(){ var self = bk.data("self"); $.fixedBackground(6000, false); self && self.css("z-index", 5999).children(":first-child").animate({left: 0},100); }); self.children(":first-child").animate({left: scope.open ? -btn_w : 0},100); } }) //按钮事件 scope.btn.click(function(){ scope.ondelete && scope.ondelete(); $.fixedBackground(6000, 1).click();//关闭背景 }); } }; });
再写个滑屏事件类,当然要兼容鼠标
(function($){ $.fn.slideable = function(options){ var self = this; self.options = options; self.left = 0; self.down = 0; self.pressed = false; self.bindobj = options.bindobj || self; self.bindobj.bind("mousedown",function(event){ onmousedown(self, event); }) self.bindobj.bind("mousemove",function(event){ onmousemove(self, event); }) self.bindobj.bind("mouseup" ,function(event){ onmouseup (self, event); }) self.bindobj[0].addEventListener('touchstart', function(event) { onmousedown(self, {screenX: event.changedTouches[0].pageX}); }) self.bindobj[0].addEventListener('touchmove' , function(event) { onmousemove(self, {screenX: event.changedTouches[0].pageX}); }) self.bindobj[0].addEventListener('touchend' , function(event) { onmouseup (self, {screenX: event.changedTouches[0].pageX}); }) return this; } function onmousedown(self, event){ self.down = event.screenX; self.options.onmousedown && self.options.onmousedown(self); self.left = self.options.getLeft && self.options.getLeft(self) || 0; self.pressed = true; } function onmousemove(self, event){ self.pressed && self.options.setLeft && self.options.setLeft(self, self.left + event.screenX - self.down); } function onmouseup(self, event){ self.pressed = false; self.left += event.screenX - self.down; self.options.onslide && self.options.onslide(self, self.left); } //背景功能 $.fixedBackground = function(z_index, b_show){ var bk = $('#fixed-background-'+z_index+''); if(!b_show)return bk && bk.remove(); if(!(bk && bk.length>0)){ bk = $('<div id="fixed-background-'+z_index+'" style="position:fixed;z-index:'+z_index+';left:0;top:0;right:0;bottom:0;background-color:rgba(0,0,0,0)">'); $("body").append(bk); } return bk; } })(jQuery);
关于上述代码给大家介绍的AngularJS仿苹果滑屏删除控件的相关代码,都是小编测试过的,可以放心安全使用。
AngularJS仿苹果滑屏删除控件
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