/** * 数字输入框 * varstion 1.0.1 * by Houfeng * Houfeng@DCloud.io */ (function($) { var touchSupport = ('ontouchstart' in document); var tapEventName = touchSupport ? 'tap' : 'click'; var changeEventName = 'change'; var holderClassName = $.className('numbox'); var plusClassSelector = $.classSelector('.btn-numbox-plus,.numbox-btn-plus'); var minusClassSelector = $.classSelector('.btn-numbox-minus,.numbox-btn-minus'); var inputClassSelector = $.classSelector('.input-numbox,.numbox-input'); var Numbox = $.Numbox = $.Class.extend({ /** * 构造函数 **/ init: function(holder, options) { var self = this; if (!holder) { throw "构造 numbox 时缺少容器元素"; } self.holder = holder; options = options || {}; options.step = parseInt(options.step || 1); self.options = options; self.input = $.qsa(inputClassSelector, self.holder)[0]; self.plus = $.qsa(plusClassSelector, self.holder)[0]; self.minus = $.qsa(minusClassSelector, self.holder)[0]; self.checkValue(); self.initEvent(); }, /** * 初始化事件绑定 **/ initEvent: function() { var self = this; self.plus.addEventListener(tapEventName, function(event) { var val = parseInt(self.input.value) + self.options.step; self.input.value = val.toString(); $.trigger(self.input, changeEventName, null); }); self.minus.addEventListener(tapEventName, function(event) { var val = parseInt(self.input.value) - self.options.step; self.input.value = val.toString(); $.trigger(self.input, changeEventName, null); }); self.input.addEventListener(changeEventName, function(event) { self.checkValue(); var val = parseInt(self.input.value); //触发顶层容器 $.trigger(self.holder, changeEventName, { value: val }); }); }, /** * 获取当前值 **/ getValue: function() { var self = this; return parseInt(self.input.value); }, /** * 验证当前值是法合法 **/ checkValue: function() { var self = this; var val = self.input.value; if (val == null || val == '' || isNaN(val)) { self.input.value = self.options.min || 0; self.minus.disabled = self.options.min != null; } else { var val = parseInt(val); if (self.options.max != null && !isNaN(self.options.max) && val >= parseInt(self.options.max)) { val = self.options.max; self.plus.disabled = true; } else { self.plus.disabled = false; } if (self.options.min != null && !isNaN(self.options.min) && val <= parseInt(self.options.min)) { val = self.options.min; self.minus.disabled = true; } else { self.minus.disabled = false; } self.input.value = val; } }, /** * 更新选项 **/ setOption: function(name, value) { var self = this; self.options[name] = value; }, /** * 动态设置新值 **/ setValue: function(value) { this.input.value = value; this.checkValue(); } }); $.fn.numbox = function(options) { var instanceArray = []; //遍历选择的元素 this.each(function(i, element) { if (element.numbox) { return; } if (options) { element.numbox = new Numbox(element, options); } else { var optionsText = element.getAttribute('data-numbox-options'); var options = optionsText ? JSON.parse(optionsText) : {}; options.step = element.getAttribute('data-numbox-step') || options.step; options.min = element.getAttribute('data-numbox-min') || options.min; options.max = element.getAttribute('data-numbox-max') || options.max; element.numbox = new Numbox(element, options); } }); return this[0] ? this[0].numbox : null; } //自动处理 class='mui-locker' 的 dom $.ready(function() { $('.' + holderClassName).numbox(); }); }(mui));