u-field.vue 11.0 KB
<template>
	<view class="u-field" :class="{'u-border-top': borderTop, 'u-border-bottom': borderBottom }">
		<view class="u-field-inner" :class="[type == 'textarea' ? 'u-textarea-inner' : '', 'u-label-postion-' + labelPosition]">
			<view class="u-label" :class="[required ? 'u-required' : '']" :style="{
				justifyContent: justifyContent, 
				flex: labelPosition == 'left' ? `0 0 ${labelWidth}rpx` : '1'
			}">
				<view class="u-icon-wrap" v-if="icon">
					<u-icon size="32" :custom-style="iconStyle" :name="icon" :color="iconColor" class="u-icon"></u-icon>
				</view>
				<slot name="icon"></slot>
				<text class="u-label-text" :class="[this.$slots.icon || icon ? 'u-label-left-gap' : '']">{{ label }}</text>
			</view>
			<view class="fild-body">
				<view class="u-flex-1 u-flex" :style="[inputWrapStyle]">
					<textarea v-if="type == 'textarea'" class="u-flex-1 u-textarea-class" :style="[fieldStyle]" :value="value"
					 :placeholder="placeholder" :placeholderStyle="placeholderStyle" :disabled="disabled" :maxlength="inputMaxlength"
					 :focus="focus" :autoHeight="autoHeight" :fixed="fixed" @input="onInput" @blur="onBlur" @focus="onFocus" @confirm="onConfirm"
					 @tap="fieldClick" />
					<input
						v-else
						:style="[fieldStyle]"
						:type="type"
						class="u-flex-1 u-field__input-wrap"
						:value="value"
						:password="password || this.type === 'password'"
						:placeholder="placeholder"
						:placeholderStyle="placeholderStyle"
						:disabled="disabled"
						:maxlength="inputMaxlength"
						:focus="focus"
						:confirmType="confirmType"
						@focus="onFocus"
						@blur="onBlur"
						@input="onInput"
						@confirm="onConfirm"
						@tap="fieldClick"
					/>
				</view>
				<u-icon :size="clearSize" v-if="clearable && value != '' && focused" name="close-circle-fill" color="#c0c4cc" class="u-clear-icon" @click="onClear"/>
				<view class="u-button-wrap"><slot name="right" /></view>
				<u-icon v-if="rightIcon" @click="rightIconClick" :name="rightIcon" color="#c0c4cc" :style="[rightIconStyle]" size="26" class="u-arror-right" />
			</view>
		</view>
		<view v-if="errorMessage !== false && errorMessage != ''" class="u-error-message" :style="{
			paddingLeft: labelWidth + 'rpx'
		}">{{ errorMessage }}</view>
	</view>
</template>

<script>
/**
 * field 输入框
 * @description 借助此组件,可以实现表单的输入, 有"text"和"textarea"类型的,此外,借助uView的picker和actionSheet组件可以快速实现上拉菜单,时间,地区选择等, 为表单解决方案的利器。
 * @tutorial https://www.uviewui.com/components/field.html
 * @property {String} type 输入框的类型(默认text)
 * @property {String} icon label左边的图标,限uView的图标名称
 * @property {Object} icon-style 左边图标的样式,对象形式
 * @property {Boolean} right-icon 输入框右边的图标名称,限uView的图标名称(默认false)
 * @property {Boolean} required 是否必填,左边您显示红色"*"号(默认false)
 * @property {String} label 输入框左边的文字提示
 * @property {Boolean} password 是否密码输入方式(用点替换文字),type为text时有效(默认false)
 * @property {Boolean} clearable 是否显示右侧清空内容的图标控件(输入框有内容,且获得焦点时才显示),点击可清空输入框内容(默认true)
 * @property {Number String} label-width label的宽度,单位rpx(默认130)
 * @property {String} label-align label的文字对齐方式(默认left)
 * @property {Object} field-style 自定义输入框的样式,对象形式
 * @property {Number | String} clear-size 清除图标的大小,单位rpx(默认30)
 * @property {String} input-align 输入框内容对齐方式(默认left)
 * @property {Boolean} border-bottom 是否显示field的下边框(默认true)
 * @property {Boolean} border-top 是否显示field的上边框(默认false)
 * @property {String} icon-color 左边通过icon配置的图标的颜色(默认#606266)
 * @property {Boolean} auto-height 是否自动增高输入区域,type为textarea时有效(默认true)
 * @property {String Boolean} error-message 显示的错误提示内容,如果为空字符串或者false,则不显示错误信息
 * @property {String} placeholder 输入框的提示文字
 * @property {String} placeholder-style placeholder的样式(内联样式,字符串),如"color: #ddd"
 * @property {Boolean} focus 是否自动获得焦点(默认false)
 * @property {Boolean} fixed 如果type为textarea,且在一个"position:fixed"的区域,需要指明为true(默认false)
 * @property {Boolean} disabled 是否不可输入(默认false)
 * @property {Number String} maxlength 最大输入长度,设置为 -1 的时候不限制最大长度(默认140)
 * @property {String} confirm-type 设置键盘右下角按钮的文字,仅在type="text"时生效(默认done)
 * @event {Function} input 输入框内容发生变化时触发
 * @event {Function} focus 输入框获得焦点时触发
 * @event {Function} blur 输入框失去焦点时触发
 * @event {Function} confirm 点击完成按钮时触发
 * @event {Function} right-icon-click 通过right-icon生成的图标被点击时触发
 * @event {Function} click 输入框被点击或者通过right-icon生成的图标被点击时触发,这样设计是考虑到传递右边的图标,一般都为需要弹出"picker"等操作时的场景,点击倒三角图标,理应发出此事件,见上方说明
 * @example <u-field v-model="mobile" label="手机号" required :error-message="errorMessage"></u-field>
 */
export default {
	name:"u-field",
	props: {
		icon: String,
		rightIcon: String,
		// arrowDirection: {
		// 	type: String,
		// 	default: 'right'
		// },
		required: Boolean,
		label: String,
		password: Boolean,
		clearable: {
			type: Boolean,
			default: true
		},
		// 左边标题的宽度单位rpx
		labelWidth: {
			type: [Number, String],
			default: 130
		},
		// 对齐方式,left|center|right
		labelAlign: {
			type: String,
			default: 'left'
		},
		inputAlign: {
			type: String,
			default: 'left'
		},
		iconColor: {
			type: String,
			default: '#606266'
		},
		autoHeight: {
			type: Boolean,
			default: true
		},
		errorMessage: {
			type: [String, Boolean],
			default: ''
		},
		placeholder: String,
		placeholderStyle: String,
		focus: Boolean,
		fixed: Boolean,
		value: [Number, String],
		type: {
			type: String,
			default: 'text'
		},
		disabled: {
			type: Boolean,
			default: false
		},
		maxlength: {
			type: [Number, String],
			default: 140
		},
		confirmType: {
			type: String,
			default: 'done'
		},
		// lable的位置,可选为 left-左边,top-上边
		labelPosition: {
			type: String,
			default: 'left'
		},
		// 输入框的自定义样式
		fieldStyle: {
			type: Object,
			default() {
				return {}
			}
		},
		// 清除按钮的大小
		clearSize: {
			type: [Number, String],
			default: 30
		},
		// lable左边的图标样式,对象形式
		iconStyle: {
			type: Object,
			default() {
				return {}
			}
		},
		// 是否显示上边框
		borderTop: {
			type: Boolean,
			default: false
		},
		// 是否显示下边框
		borderBottom: {
			type: Boolean,
			default: true
		},
		// 是否自动去除两端的空格
		trim: {
			type: Boolean,
			default: true
		}
	},
	data() {
		return {
			focused: false,
			itemIndex: 0,
		};
	},
	computed: {
		inputWrapStyle() {
			let style = {};
			style.textAlign = this.inputAlign;
			// 判断lable的位置,如果是left的话,让input左边两边有间隙
			if(this.labelPosition == 'left') {
				style.margin = `0 8rpx`;
			} else {
				// 如果lable是top的,input的左边就没必要有间隙了
				style.marginRight = `8rpx`;
			}
			return style;
		},
		rightIconStyle() {
			let style = {};
			if (this.arrowDirection == 'top') style.transform = 'roate(-90deg)';
			if (this.arrowDirection == 'bottom') style.transform = 'roate(90deg)';
			else style.transform = 'roate(0deg)';
			return style;
		},
		labelStyle() {
			let style = {};
			if(this.labelAlign == 'left') style.justifyContent = 'flext-start';
			if(this.labelAlign == 'center') style.justifyContent = 'center';
			if(this.labelAlign == 'right') style.justifyContent = 'flext-end';
			return style;
		},
		// uni不支持在computed中写style.justifyContent = 'center'的形式,故用此方法
		justifyContent() {
			if(this.labelAlign == 'left') return 'flex-start';
			if(this.labelAlign == 'center') return 'center';
			if(this.labelAlign == 'right') return 'flex-end';
		},
		// 因为uniapp的input组件的maxlength组件必须要数值,这里转为数值,给用户可以传入字符串数值
		inputMaxlength() {
			return Number(this.maxlength)
		},
		// label的位置
		fieldInnerStyle() {
			let style = {};
			if(this.labelPosition == 'left') {
				style.flexDirection = 'row';
			} else {
				style.flexDirection = 'column';
			}
			
			return style;
		}
	},
	methods: {
		onInput(event) {
			let value = event.detail.value;
			// 判断是否去除空格
			if(this.trim) value = this.$u.trim(value);
			this.$emit('input', value);
		},
		onFocus(event) {
			this.focused = true;
			this.$emit('focus', event);
		},
		onBlur(event) {
			// 最开始使用的是监听图标@touchstart事件,自从hx2.8.4后,此方法在微信小程序出错
			// 这里改为监听点击事件,手点击清除图标时,同时也发生了@blur事件,导致图标消失而无法点击,这里做一个延时
			setTimeout(() => {
				this.focused = false;
			}, 100)
			this.$emit('blur', event);
		},
		onConfirm(e) {
			this.$emit('confirm', e.detail.value);
		},
		onClear(event) {
			this.$emit('input', '');
		},
		rightIconClick() {
			this.$emit('right-icon-click');
			this.$emit('click');
		},
		fieldClick() {
			this.$emit('click');
		}
	}
};
</script>

<style lang="scss" scoped>
@import "../../libs/css/style.components.scss";
	
.u-field {
	font-size: 28rpx;
	padding: 20rpx 28rpx;
	text-align: left;
	position: relative;
	color: $u-main-color;
}

.u-field-inner {
	@include vue-flex;
	align-items: center;
}

.u-textarea-inner {
	align-items: flex-start;
}

.u-textarea-class {
	min-height: 96rpx;
	width: auto;
	font-size: 28rpx;
}

.fild-body {
	@include vue-flex;
	flex: 1;
	align-items: center;
}

.u-arror-right {
	margin-left: 8rpx;
}

.u-label-text {
	/* #ifndef APP-NVUE */
	display: inline-flex;		
	/* #endif */
}

.u-label-left-gap {
	margin-left: 6rpx;
}

.u-label-postion-top {
	flex-direction: column;
	align-items: flex-start;
}

.u-label {
	width: 130rpx;
	flex: 1 1 130rpx;
	text-align: left;
	position: relative;
	@include vue-flex;
	align-items: center;
}

.u-required::before {
	content: '*';
	position: absolute;
	left: -16rpx;
	font-size: 14px;
	color: $u-type-error;
	height: 9px;
	line-height: 1;
}

.u-field__input-wrap {
	position: relative;
	overflow: hidden;
	font-size: 28rpx;
	height: 48rpx;
	flex: 1;
	width: auto;
}

.u-clear-icon {
	@include vue-flex;
	align-items: center;
}

.u-error-message {
	color: $u-type-error;
	font-size: 26rpx;
	text-align: left;
}

.placeholder-style {
	color: rgb(150, 151, 153);
}

.u-input-class {
	font-size: 28rpx;
}

.u-button-wrap {
	margin-left: 8rpx;
}
</style>