432 lines
		
	
	
		
			14 KiB
		
	
	
	
		
			Vue
		
	
	
	
		
		
			
		
	
	
			432 lines
		
	
	
		
			14 KiB
		
	
	
	
		
			Vue
		
	
	
	
|  | <template> | |||
|  | 	<view class="u-form-item" :class="{'u-border-bottom': elBorderBottom, 'u-form-item__border-bottom--error': validateState === 'error' && showError('border-bottom')}"> | |||
|  | 		<view class="u-form-item__body" :style="{ | |||
|  | 			flexDirection: elLabelPosition == 'left' ? 'row' : 'column' | |||
|  | 		}"> | |||
|  | 			<!-- 微信小程序中,将一个参数设置空字符串,结果会变成字符串"true" --> | |||
|  | 			<view class="u-form-item--left" :style="{ | |||
|  | 				width: uLabelWidth, | |||
|  | 				flex: `0 0 ${uLabelWidth}`, | |||
|  | 				marginBottom: elLabelPosition == 'left' ? 0 : '10rpx', | |||
|  | 			}"> | |||
|  | 				<!-- 为了块对齐 --> | |||
|  | 				<view class="u-form-item--left__content" v-if="required || leftIcon || label"> | |||
|  | 					<!-- nvue不支持伪元素before --> | |||
|  | 					<text v-if="required" class="u-form-item--left__content--required">*</text> | |||
|  | 					<view class="u-form-item--left__content__icon" v-if="leftIcon"> | |||
|  | 						<u-icon :name="leftIcon" :custom-style="leftIconStyle"></u-icon> | |||
|  | 					</view> | |||
|  | 					<view class="u-form-item--left__content__label" :style="[elLabelStyle, { | |||
|  | 						'justify-content': elLabelAlign == 'left' ? 'flex-start' : elLabelAlign == 'center' ? 'center' : 'flex-end' | |||
|  | 					}]"> | |||
|  | 						{{label}} | |||
|  | 					</view> | |||
|  | 				</view> | |||
|  | 			</view> | |||
|  | 			<view class="u-form-item--right u-flex"> | |||
|  | 				<view class="u-form-item--right__content"> | |||
|  | 					<view class="u-form-item--right__content__slot "> | |||
|  | 						<slot /> | |||
|  | 					</view> | |||
|  | 					<view class="u-form-item--right__content__icon u-flex" v-if="$slots.right || rightIcon"> | |||
|  | 						<u-icon :custom-style="rightIconStyle" v-if="rightIcon" :name="rightIcon"></u-icon> | |||
|  | 						<slot name="right" /> | |||
|  | 					</view> | |||
|  | 				</view> | |||
|  | 			</view> | |||
|  | 		</view> | |||
|  | 		<view class="u-form-item__message" v-if="validateState === 'error' && showError('message')" :style="{ | |||
|  | 			paddingLeft: elLabelPosition == 'left' ? $u.addUnit(elLabelWidth) : '0', | |||
|  | 		}">{{validateMessage}}</view> | |||
|  | 	</view> | |||
|  | </template> | |||
|  | 
 | |||
|  | <script> | |||
|  | 	import Emitter from '../../libs/util/emitter.js'; | |||
|  | 	import schema from '../../libs/util/async-validator'; | |||
|  | 	// 去除警告信息
 | |||
|  | 	schema.warning = function() {}; | |||
|  | 
 | |||
|  | 	/** | |||
|  | 	 * form-item 表单item | |||
|  | 	 * @description 此组件一般用于表单场景,可以配置Input输入框,Select弹出框,进行表单验证等。 | |||
|  | 	 * @tutorial http://uviewui.com/components/form.html
 | |||
|  | 	 * @property {String} label 左侧提示文字 | |||
|  | 	 * @property {Object} prop 表单域model对象的属性名,在使用 validate、resetFields 方法的情况下,该属性是必填的 | |||
|  | 	 * @property {Boolean} border-bottom 是否显示表单域的下划线边框 | |||
|  | 	 * @property {String} label-position 表单域提示文字的位置,left-左侧,top-上方 | |||
|  | 	 * @property {String Number} label-width 提示文字的宽度,单位rpx(默认90) | |||
|  | 	 * @property {Object} label-style lable的样式,对象形式 | |||
|  | 	 * @property {String} label-align lable的对齐方式 | |||
|  | 	 * @property {String} right-icon 右侧自定义字体图标(限uView内置图标)或图片地址 | |||
|  | 	 * @property {String} left-icon 左侧自定义字体图标(限uView内置图标)或图片地址 | |||
|  | 	 * @property {Object} left-icon-style 左侧图标的样式,对象形式 | |||
|  | 	 * @property {Object} right-icon-style 右侧图标的样式,对象形式 | |||
|  | 	 * @property {Boolean} required 是否显示左边的"*"号,这里仅起展示作用,如需校验必填,请通过rules配置必填规则(默认false) | |||
|  | 	 * @example <u-form-item label="姓名"><u-input v-model="form.name" /></u-form-item> | |||
|  | 	 */ | |||
|  | 
 | |||
|  | 	export default { | |||
|  | 		name: 'u-form-item', | |||
|  | 		mixins: [Emitter], | |||
|  | 		inject: { | |||
|  | 			uForm: { | |||
|  | 				default () { | |||
|  | 					return null | |||
|  | 				} | |||
|  | 			} | |||
|  | 		}, | |||
|  | 		props: { | |||
|  | 			// input的label提示语
 | |||
|  | 			label: { | |||
|  | 				type: String, | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// 绑定的值
 | |||
|  | 			prop: { | |||
|  | 				type: String, | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// 是否显示表单域的下划线边框
 | |||
|  | 			borderBottom: { | |||
|  | 				type: [String, Boolean], | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// label的位置,left-左边,top-上边
 | |||
|  | 			labelPosition: { | |||
|  | 				type: String, | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// label的宽度,单位rpx
 | |||
|  | 			labelWidth: { | |||
|  | 				type: [String, Number], | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// lable的样式,对象形式
 | |||
|  | 			labelStyle: { | |||
|  | 				type: Object, | |||
|  | 				default () { | |||
|  | 					return {} | |||
|  | 				} | |||
|  | 			}, | |||
|  | 			// lable字体的对齐方式
 | |||
|  | 			labelAlign: { | |||
|  | 				type: String, | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// 右侧图标
 | |||
|  | 			rightIcon: { | |||
|  | 				type: String, | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// 左侧图标
 | |||
|  | 			leftIcon: { | |||
|  | 				type: String, | |||
|  | 				default: '' | |||
|  | 			}, | |||
|  | 			// 左侧图标的样式
 | |||
|  | 			leftIconStyle: { | |||
|  | 				type: Object, | |||
|  | 				default () { | |||
|  | 					return {} | |||
|  | 				} | |||
|  | 			}, | |||
|  | 			// 左侧图标的样式
 | |||
|  | 			rightIconStyle: { | |||
|  | 				type: Object, | |||
|  | 				default () { | |||
|  | 					return {} | |||
|  | 				} | |||
|  | 			}, | |||
|  | 			// 是否显示左边的必填星号,只作显示用,具体校验必填的逻辑,请在rules中配置
 | |||
|  | 			required: { | |||
|  | 				type: Boolean, | |||
|  | 				default: false | |||
|  | 			} | |||
|  | 		}, | |||
|  | 		data() { | |||
|  | 			return { | |||
|  | 				initialValue: '', // 存储的默认值
 | |||
|  | 				// isRequired: false, // 是否必填,由于人性化考虑,必填"*"号通过props的required配置,不再通过rules的规则自动生成
 | |||
|  | 				validateState: '', // 是否校验成功
 | |||
|  | 				validateMessage: '', // 校验失败的提示语
 | |||
|  | 				// 有错误时的提示方式,message-提示信息,border-如果input设置了边框,变成呈红色,
 | |||
|  | 				errorType: ['message'], | |||
|  | 				fieldValue: '', // 获取当前子组件input的输入的值
 | |||
|  | 				// 父组件的参数,在computed计算中,无法得知this.parent发生变化,故将父组件的参数值,放到data中
 | |||
|  | 				parentData: { | |||
|  | 					borderBottom: true, | |||
|  | 					labelWidth: 90, | |||
|  | 					labelPosition: 'left', | |||
|  | 					labelStyle: {}, | |||
|  | 					labelAlign: 'left', | |||
|  | 				} | |||
|  | 			}; | |||
|  | 		}, | |||
|  | 		watch: { | |||
|  | 			validateState(val) { | |||
|  | 				this.broadcastInputError(); | |||
|  | 			}, | |||
|  | 			// 监听u-form组件的errorType的变化
 | |||
|  | 			"uForm.errorType"(val) { | |||
|  | 				this.errorType = val; | |||
|  | 				this.broadcastInputError(); | |||
|  | 			}, | |||
|  | 		}, | |||
|  | 		computed: { | |||
|  | 			// 计算后的label宽度,由于需要多个判断,故放到computed中
 | |||
|  | 			uLabelWidth() { | |||
|  | 				// 如果用户设置label为空字符串(微信小程序空字符串最终会变成字符串的'true'),意味着要将label的位置宽度设置为auto
 | |||
|  | 				return this.elLabelPosition == 'left' ? (this.label === 'true' || this.label === '' ? 'auto' : this.$u.addUnit(this | |||
|  | 					.elLabelWidth)) : '100%'; | |||
|  | 			}, | |||
|  | 			showError() { | |||
|  | 				return type => { | |||
|  | 					// 如果errorType数组中含有none,或者toast提示类型
 | |||
|  | 					if (this.errorType.indexOf('none') >= 0) return false; | |||
|  | 					else if (this.errorType.indexOf(type) >= 0) return true; | |||
|  | 					else return false; | |||
|  | 				} | |||
|  | 			}, | |||
|  | 			// label的宽度
 | |||
|  | 			elLabelWidth() { | |||
|  | 				// label默认宽度为90,优先使用本组件的值,如果没有(如果设置为0,也算是配置了值,依然起效),则用u-form的值
 | |||
|  | 				return (this.labelWidth != 0 || this.labelWidth != '') ? this.labelWidth : (this.parentData.labelWidth ? this.parentData | |||
|  | 					.labelWidth : | |||
|  | 					90); | |||
|  | 			}, | |||
|  | 			// label的样式
 | |||
|  | 			elLabelStyle() { | |||
|  | 				return Object.keys(this.labelStyle).length ? this.labelStyle : (this.parentData.labelStyle ? this.parentData.labelStyle : | |||
|  | 					{}); | |||
|  | 			}, | |||
|  | 			// label的位置,左侧或者上方
 | |||
|  | 			elLabelPosition() { | |||
|  | 				return this.labelPosition ? this.labelPosition : (this.parentData.labelPosition ? this.parentData.labelPosition : | |||
|  | 					'left'); | |||
|  | 			}, | |||
|  | 			// label的对齐方式
 | |||
|  | 			elLabelAlign() { | |||
|  | 				return this.labelAlign ? this.labelAlign : (this.parentData.labelAlign ? this.parentData.labelAlign : 'left'); | |||
|  | 			}, | |||
|  | 			// label的下划线
 | |||
|  | 			elBorderBottom() { | |||
|  | 				// 子组件的borderBottom默认为空字符串,如果不等于空字符串,意味着子组件设置了值,优先使用子组件的值
 | |||
|  | 				return this.borderBottom !== '' ? this.borderBottom : this.parentData.borderBottom ? this.parentData.borderBottom : | |||
|  | 					true; | |||
|  | 			} | |||
|  | 		}, | |||
|  | 		methods: { | |||
|  | 			broadcastInputError() { | |||
|  | 				// 子组件发出事件,第三个参数为true或者false,true代表有错误
 | |||
|  | 				this.broadcast('u-input', 'on-form-item-error', this.validateState === 'error' && this.showError('border')); | |||
|  | 			}, | |||
|  | 			// 判断是否需要required校验
 | |||
|  | 			setRules() { | |||
|  | 				let that = this; | |||
|  | 				// 由于人性化考虑,必填"*"号通过props的required配置,不再通过rules的规则自动生成
 | |||
|  | 				// 从父组件u-form拿到当前u-form-item需要验证 的规则
 | |||
|  | 				// let rules = this.getRules();
 | |||
|  | 				// if (rules.length) {
 | |||
|  | 				// 	this.isRequired = rules.some(rule => {
 | |||
|  | 				// 		// 如果有必填项,就返回,没有的话,就是undefined
 | |||
|  | 				// 		return rule.required;
 | |||
|  | 				// 	});
 | |||
|  | 				// }
 | |||
|  | 
 | |||
|  | 				// blur事件
 | |||
|  | 				this.$on('on-form-blur', that.onFieldBlur); | |||
|  | 				// change事件
 | |||
|  | 				this.$on('on-form-change', that.onFieldChange); | |||
|  | 			}, | |||
|  | 
 | |||
|  | 			// 从u-form的rules属性中,取出当前u-form-item的校验规则
 | |||
|  | 			getRules() { | |||
|  | 				// 父组件的所有规则
 | |||
|  | 				let rules = this.parent.rules; | |||
|  | 				rules = rules ? rules[this.prop] : []; | |||
|  | 				// 保证返回的是一个数组形式
 | |||
|  | 				return [].concat(rules || []); | |||
|  | 			}, | |||
|  | 
 | |||
|  | 			// blur事件时进行表单校验
 | |||
|  | 			onFieldBlur() { | |||
|  | 				this.validation('blur'); | |||
|  | 			}, | |||
|  | 
 | |||
|  | 			// change事件进行表单校验
 | |||
|  | 			onFieldChange() { | |||
|  | 				this.validation('change'); | |||
|  | 			}, | |||
|  | 
 | |||
|  | 			// 过滤出符合要求的rule规则
 | |||
|  | 			getFilteredRule(triggerType = '') { | |||
|  | 				let rules = this.getRules(); | |||
|  | 				// 整体验证表单时,triggerType为空字符串,此时返回所有规则进行验证
 | |||
|  | 				if (!triggerType) return rules; | |||
|  | 				// 历遍判断规则是否有对应的事件,比如blur,change触发等的事件
 | |||
|  | 				// 使用indexOf判断,是因为某些时候设置的验证规则的trigger属性可能为多个,比如['blur','change']
 | |||
|  | 				// 某些场景可能的判断规则,可能不存在trigger属性,故先判断是否存在此属性
 | |||
|  | 				return rules.filter(res => res.trigger && res.trigger.indexOf(triggerType) !== -1); | |||
|  | 			}, | |||
|  | 
 | |||
|  | 			// 校验数据
 | |||
|  | 			validation(trigger, callback = () => {}) { | |||
|  | 				// 检验之间,先获取需要校验的值
 | |||
|  | 				this.fieldValue = this.parent.model[this.prop]; | |||
|  | 				// blur和change是否有当前方式的校验规则
 | |||
|  | 				let rules = this.getFilteredRule(trigger); | |||
|  | 				// 判断是否有验证规则,如果没有规则,也调用回调方法,否则父组件u-form会因为
 | |||
|  | 				// 对count变量的统计错误而无法进入上一层的回调
 | |||
|  | 				if (!rules || rules.length === 0) { | |||
|  | 					return callback(''); | |||
|  | 				} | |||
|  | 				// 设置当前的装填,标识为校验中
 | |||
|  | 				this.validateState = 'validating'; | |||
|  | 				// 调用async-validator的方法
 | |||
|  | 				let validator = new schema({ | |||
|  | 					[this.prop]: rules | |||
|  | 				}); | |||
|  | 				validator.validate({ | |||
|  | 					[this.prop]: this.fieldValue | |||
|  | 				}, { | |||
|  | 					firstFields: true | |||
|  | 				}, (errors, fields) => { | |||
|  | 					// 记录状态和报错信息
 | |||
|  | 					this.validateState = !errors ? 'success' : 'error'; | |||
|  | 					this.validateMessage = errors ? errors[0].message : ''; | |||
|  | 					// 调用回调方法
 | |||
|  | 					callback(this.validateMessage); | |||
|  | 				}); | |||
|  | 			}, | |||
|  | 
 | |||
|  | 			// 清空当前的u-form-item
 | |||
|  | 			resetField() { | |||
|  | 				this.parent.model[this.prop] = this.initialValue; | |||
|  | 				// 设置为`success`状态,只是为了清空错误标记
 | |||
|  | 				this.validateState = 'success'; | |||
|  | 			} | |||
|  | 		}, | |||
|  | 
 | |||
|  | 		// 组件创建完成时,将当前实例保存到u-form中
 | |||
|  | 		mounted() { | |||
|  | 			// 支付宝、头条小程序不支持provide/inject,所以使用这个方法获取整个父组件,在created定义,避免循环应用
 | |||
|  | 			this.parent = this.$u.$parent.call(this, 'u-form'); | |||
|  | 			if (this.parent) { | |||
|  | 				// 历遍parentData中的属性,将parent中的同名属性赋值给parentData
 | |||
|  | 				Object.keys(this.parentData).map(key => { | |||
|  | 					this.parentData[key] = this.parent[key]; | |||
|  | 				}); | |||
|  | 				// 如果没有传入prop,或者uForm为空(如果u-form-input单独使用,就不会有uForm注入),就不进行校验
 | |||
|  | 				if (this.prop) { | |||
|  | 					// 将本实例添加到父组件中
 | |||
|  | 					this.parent.fields.push(this); | |||
|  | 					this.errorType = this.parent.errorType; | |||
|  | 					// 设置初始值
 | |||
|  | 					this.initialValue = this.fieldValue; | |||
|  | 					// 添加表单校验,这里必须要写在$nextTick中,因为u-form的rules是通过ref手动传入的
 | |||
|  | 					// 不在$nextTick中的话,可能会造成执行此处代码时,父组件还没通过ref把规则给u-form,导致规则为空
 | |||
|  | 					this.$nextTick(() => { | |||
|  | 						this.setRules(); | |||
|  | 					}) | |||
|  | 				} | |||
|  | 			} | |||
|  | 		}, | |||
|  | 
 | |||
|  | 		// 组件销毁前,将实例从u-form的缓存中移除
 | |||
|  | 		beforeDestroy() { | |||
|  | 			// 如果当前没有prop的话表示当前不要进行删除(因为没有注入)
 | |||
|  | 			if (this.parent && this.prop) { | |||
|  | 				this.parent.fields.map((item, index) => { | |||
|  | 					if (item === this) this.parent.fields.splice(index, 1); | |||
|  | 				}) | |||
|  | 			} | |||
|  | 		}, | |||
|  | 	}; | |||
|  | </script> | |||
|  | 
 | |||
|  | <style lang="scss" scoped> | |||
|  | 	@import "../../libs/css/style.components.scss"; | |||
|  | 
 | |||
|  | 	.u-form-item { | |||
|  | 		@include vue-flex; | |||
|  | 		// align-items: flex-start;
 | |||
|  | 		padding: 20rpx 0; | |||
|  | 		font-size: 28rpx; | |||
|  | 		color: $u-main-color; | |||
|  | 		box-sizing: border-box; | |||
|  | 		line-height: $u-form-item-height; | |||
|  | 		flex-direction: column; | |||
|  | 
 | |||
|  | 		&__border-bottom--error:after { | |||
|  | 			border-color: $u-type-error; | |||
|  | 		} | |||
|  | 
 | |||
|  | 		&__body { | |||
|  | 			@include vue-flex; | |||
|  | 		} | |||
|  | 
 | |||
|  | 		&--left { | |||
|  | 			@include vue-flex; | |||
|  | 			align-items: center; | |||
|  | 
 | |||
|  | 			&__content { | |||
|  | 				position: relative; | |||
|  | 				@include vue-flex; | |||
|  | 				align-items: center; | |||
|  | 				padding-right: 10rpx; | |||
|  | 				flex: 1; | |||
|  | 
 | |||
|  | 				&__icon { | |||
|  | 					margin-right: 8rpx; | |||
|  | 				} | |||
|  | 
 | |||
|  | 				&--required { | |||
|  | 					position: absolute; | |||
|  | 					left: -16rpx; | |||
|  | 					vertical-align: middle; | |||
|  | 					color: $u-type-error; | |||
|  | 					padding-top: 6rpx; | |||
|  | 				} | |||
|  | 
 | |||
|  | 				&__label { | |||
|  | 					@include vue-flex; | |||
|  | 					align-items: center; | |||
|  | 					flex: 1; | |||
|  | 				} | |||
|  | 			} | |||
|  | 		} | |||
|  | 
 | |||
|  | 		&--right { | |||
|  | 			flex: 1; | |||
|  | 
 | |||
|  | 			&__content { | |||
|  | 				@include vue-flex; | |||
|  | 				align-items: center; | |||
|  | 				flex: 1; | |||
|  | 
 | |||
|  | 				&__slot { | |||
|  | 					flex: 1; | |||
|  | 					/* #ifndef MP */ | |||
|  | 					@include vue-flex; | |||
|  | 					align-items: center; | |||
|  | 					/* #endif */ | |||
|  | 				} | |||
|  | 
 | |||
|  | 				&__icon { | |||
|  | 					margin-left: 10rpx; | |||
|  | 					color: $u-light-color; | |||
|  | 					font-size: 30rpx; | |||
|  | 				} | |||
|  | 			} | |||
|  | 		} | |||
|  | 
 | |||
|  | 		&__message { | |||
|  | 			font-size: 24rpx; | |||
|  | 			line-height: 24rpx; | |||
|  | 			color: $u-type-error; | |||
|  | 			margin-top: 12rpx; | |||
|  | 		} | |||
|  | 	} | |||
|  | </style> |