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			347 lines
		
	
	
		
			14 KiB
		
	
	
	
		
			Vue
		
	
	
	
	
	
			
		
		
	
	
			347 lines
		
	
	
		
			14 KiB
		
	
	
	
		
			Vue
		
	
	
	
	
	
<template>
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    <view class="u-input" :class="inputClass" :style="[wrapperStyle]">
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        <view class="u-input__content">
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            <view
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                class="u-input__content__prefix-icon"
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                v-if="prefixIcon || $slots.prefix"
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            >
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                <slot name="prefix">
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                    <u-icon
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                        :name="prefixIcon"
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                        size="18"
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                        :customStyle="prefixIconStyle"
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                    ></u-icon>
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                </slot>
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            </view>
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            <input
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                class="u-input__content__field"
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                :style="[inputStyle]"
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                :type="type"
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                :focus="focus"
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                :cursor="cursor"
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                :value="innerValue"
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                :auto-blur="autoBlur"
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                :disabled="disabled"
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                :maxlength="maxlength"
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                :placeholder="placeholder"
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                :placeholder-style="placeholderStyle"
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                :placeholder-class="placeholderClass"
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                :confirm-type="confirmType"
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                :confirm-hold="confirmHold"
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                :hold-keyboard="holdKeyboard"
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                :cursor-spacing="cursorSpacing"
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                :adjust-position="adjustPosition"
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                :selection-end="selectionEnd"
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                :selection-start="selectionStart"
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                :password="password || type === 'password'"
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                @input="onInput"
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                @blur="onBlur"
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                @focus="onFocus"
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                @confirm="onConfirm"
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                @keyboardheightchange="onkeyboardheightchange"
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                @tap="clickHandler"
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            />
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            <view
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                class="u-input__content__clear"
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                v-if="isShowClear"
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                @tap="onClear"
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            >
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                <u-icon
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                    name="close"
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                    size="11"
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                    color="#ffffff"
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                    customStyle="line-height: 12px"
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                ></u-icon>
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            </view>
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            <view
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                class="u-input__content__subfix-icon"
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                v-if="suffixIcon || $slots.suffix"
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            >
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                <slot name="suffix">
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                    <u-icon
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                        :name="suffixIcon"
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                        size="18"
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                        :customStyle="suffixIconStyle"
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                    ></u-icon>
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                </slot>
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            </view>
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        </view>
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    </view>
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</template>
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<script>
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import props from "./props.js";
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/**
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 * Input 输入框
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 * @description  此组件为一个输入框,默认没有边框和样式,是专门为配合表单组件u-form而设计的,利用它可以快速实现表单验证,输入内容,下拉选择等功能。
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 * @tutorial https://uviewui.com/components/input.html
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 * @property {String | Number}	value					输入的值
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 * @property {String}			type					输入框类型,见上方说明 ( 默认 'text' )
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 * @property {Boolean}			fixed					如果 textarea 是在一个 position:fixed 的区域,需要显示指定属性 fixed 为 true,兼容性:微信小程序、百度小程序、字节跳动小程序、QQ小程序 ( 默认 false )
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 * @property {Boolean}			disabled				是否禁用输入框 ( 默认 false )
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 * @property {String}			disabledColor			禁用状态时的背景色( 默认 '#f5f7fa' )
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 * @property {Boolean}			clearable				是否显示清除控件 ( 默认 false )
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 * @property {Boolean}			password				是否密码类型 ( 默认 false )
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 * @property {String | Number}	maxlength				最大输入长度,设置为 -1 的时候不限制最大长度 ( 默认 -1 )
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 * @property {String}			placeholder				输入框为空时的占位符
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 * @property {String}			placeholderClass		指定placeholder的样式类,注意页面或组件的style中写了scoped时,需要在类名前写/deep/ ( 默认 'input-placeholder' )
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 * @property {String | Object}	placeholderStyle		指定placeholder的样式,字符串/对象形式,如"color: red;"
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 * @property {Boolean}			showWordLimit			是否显示输入字数统计,只在 type ="text"或type ="textarea"时有效 ( 默认 false )
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 * @property {String}			confirmType				设置右下角按钮的文字,兼容性详见uni-app文档 ( 默认 'done' )
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 * @property {Boolean}			confirmHold				点击键盘右下角按钮时是否保持键盘不收起,H5无效 ( 默认 false )
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 * @property {Boolean}			holdKeyboard			focus时,点击页面的时候不收起键盘,微信小程序有效 ( 默认 false )
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 * @property {Boolean}			focus					自动获取焦点,在 H5 平台能否聚焦以及软键盘是否跟随弹出,取决于当前浏览器本身的实现。nvue 页面不支持,需使用组件的 focus()、blur() 方法控制焦点 ( 默认 false )
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 * @property {Boolean}			autoBlur				键盘收起时,是否自动失去焦点,目前仅App3.0.0+有效 ( 默认 false )
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 * @property {Boolean}			disableDefaultPadding	是否去掉 iOS 下的默认内边距,仅微信小程序,且type=textarea时有效 ( 默认 false )
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 * @property {String | Number}	cursor					指定focus时光标的位置( 默认 -1 )
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 * @property {String | Number}	cursorSpacing			输入框聚焦时底部与键盘的距离 ( 默认 30 )
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 * @property {String | Number}	selectionStart			光标起始位置,自动聚集时有效,需与selection-end搭配使用 ( 默认 -1 )
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 * @property {String | Number}	selectionEnd			光标结束位置,自动聚集时有效,需与selection-start搭配使用 ( 默认 -1 )
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 * @property {Boolean}			adjustPosition			键盘弹起时,是否自动上推页面 ( 默认 true )
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 * @property {String}			inputAlign				输入框内容对齐方式( 默认 'left' )
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 * @property {Boolean}			autosize				是否自适应内容高度,只对type=textarea有效,可传入对象,如{ maxHeight: 100, minHeight: 50 } ( 默认 false )
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 * @property {String | Number}	fontSize				输入框字体的大小 ( 默认 '15px' )
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 * @property {String}			color					输入框字体颜色	( 默认 '#303133' )
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 * @property {Function}			formatter			    内容式化函数
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 * @property {String}			prefixIcon				输入框前置图标
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 * @property {String | Object}	prefixIconStyle			前置图标样式,对象或字符串
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 * @property {String}			suffixIcon				输入框后置图标
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 * @property {String | Object}	suffixIconStyle			后置图标样式,对象或字符串
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 * @property {String}			border					边框类型,surround-四周边框,bottom-底部边框,none-无边框 ( 默认 'surround' )
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 * @property {Boolean}			readonly				是否只读,与disabled不同之处在于disabled会置灰组件,而readonly则不会 ( 默认 false )
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 * @property {String}			shape					输入框形状,circle-圆形,square-方形 ( 默认 'square' )
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 * @property {Object}			customStyle				定义需要用到的外部样式
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 *
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 * @example <u-input v-model="value" :password="true" suffix-icon="lock-fill" />
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 */
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export default {
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    name: "u-input",
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    mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
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    data() {
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        return {
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            // 输入框的值
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            innerValue: "",
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            // 是否处于获得焦点状态
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            focused: false,
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            // value是否第一次变化,在watch中,由于加入immediate属性,会在第一次触发,此时不应该认为value发生了变化
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            firstChange: true,
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            // value绑定值的变化是由内部还是外部引起的
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            changeFromInner: false,
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			// 过滤处理方法
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			innerFormatter: value => value
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        };
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    },
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    watch: {
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        value: {
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            immediate: true,
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            handler(newVal, oldVal) {
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                this.innerValue = newVal;
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                /* #ifdef H5 */
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                // 在H5中,外部value变化后,修改input中的值,不会触发@input事件,此时手动调用值变化方法
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                if (
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                    this.firstChange === false &&
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                    this.changeFromInner === false
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                ) {
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                    this.valueChange();
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                }
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                /* #endif */
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                this.firstChange = false;
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                // 重置changeFromInner的值为false,标识下一次引起默认为外部引起的
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                this.changeFromInner = false;
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            },
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        },
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    },
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    computed: {
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        // 是否显示清除控件
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        isShowClear() {
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            const { clearable, readonly, focused, innerValue } = this;
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            return !!clearable && !readonly && !!focused && innerValue !== "";
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        },
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        // 组件的类名
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        inputClass() {
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            let classes = [],
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                { border, disabled, shape } = this;
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            border === "surround" &&
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                (classes = classes.concat(["u-border", "u-input--radius"]));
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            classes.push(`u-input--${shape}`);
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            border === "bottom" &&
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                (classes = classes.concat([
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                    "u-border-bottom",
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                    "u-input--no-radius",
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                ]));
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            return classes.join(" ");
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        },
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        // 组件的样式
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        wrapperStyle() {
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            const style = {};
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            // 禁用状态下,被背景色加上对应的样式
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            if (this.disabled) {
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                style.backgroundColor = this.disabledColor;
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            }
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            // 无边框时,去除内边距
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            if (this.border === "none") {
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                style.padding = "0";
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            } else {
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                // 由于uni-app的iOS开发者能力有限,导致需要分开写才有效
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                style.paddingTop = "6px";
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                style.paddingBottom = "6px";
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                style.paddingLeft = "9px";
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                style.paddingRight = "9px";
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            }
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            return uni.$u.deepMerge(style, this.$u.addStyle(this.customStyle));
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        },
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        // 输入框的样式
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        inputStyle() {
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            const style = {
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                color: this.color,
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                fontSize: uni.$u.addUnit(this.fontSize),
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				textAlign: this.inputAlign
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            };
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            return style;
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        },
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    },
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    methods: {
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		// 在微信小程序中,不支持将函数当做props参数,故只能通过ref形式调用
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		setFormatter(e) {
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			this.innerFormatter = e
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		},
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        // 当键盘输入时,触发input事件
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        onInput(e) {
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            let { value = "" } = e.detail || {};
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            // 格式化过滤方法
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            const formatter = this.formatter || this.innerFormatter
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            const formatValue = formatter(value)
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            // 为了避免props的单向数据流特性,需要先将innerValue值设置为当前值,再在$nextTick中重新赋予设置后的值才有效
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            this.innerValue = value
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            this.$nextTick(() => {
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            	this.innerValue = formatValue;
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            	this.valueChange();
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            })
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        },
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        // 输入框失去焦点时触发
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        onBlur(event) {
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            this.$emit("blur", event.detail.value);
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            // H5端的blur会先于点击清除控件的点击click事件触发,导致focused
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            // 瞬间为false,从而隐藏了清除控件而无法被点击到
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            uni.$u.sleep(50).then(() => {
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                this.focused = false;
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            });
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            // 尝试调用u-form的验证方法
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            uni.$u.formValidate(this, "blur");
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        },
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        // 输入框聚焦时触发
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        onFocus(event) {
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            this.focused = true;
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            this.$emit("focus");
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        },
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        // 点击完成按钮时触发
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        onConfirm(event) {
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            this.$emit("confirm", this.innerValue);
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        },
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        // 键盘高度发生变化的时候触发此事件
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        // 兼容性:微信小程序2.7.0+、App 3.1.0+
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		onkeyboardheightchange() {
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            this.$emit("keyboardheightchange");
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        },
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        // 内容发生变化,进行处理
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        valueChange() {
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            const value = this.innerValue;
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            this.$nextTick(() => {
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                this.$emit("input", value);
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                // 标识value值的变化是由内部引起的
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                this.changeFromInner = true;
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                this.$emit("change", value);
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                // 尝试调用u-form的验证方法
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                uni.$u.formValidate(this, "change");
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            });
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        },
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        // 点击清除控件
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        onClear() {
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            this.innerValue = "";
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            this.$nextTick(() => {
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                this.valueChange();
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                this.$emit("clear");
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            });
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        },
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        /**
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         * 在安卓nvue上,事件无法冒泡
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         * 在某些时间,我们希望监听u-from-item的点击事件,此时会导致点击u-form-item内的u-input后
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         * 无法触发u-form-item的点击事件,这里通过手动调用u-form-item的方法进行触发
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         */
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        clickHandler() {
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            // #ifdef APP-NVUE
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            if (uni.$u.os() === "android") {
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                const formItem = uni.$u.$parent.call(this, "u-form-item");
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                if (formItem) {
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                    formItem.clickHandler();
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                }
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            }
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            // #endif
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        },
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    },
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};
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</script>
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<style lang="scss" scoped>
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@import "../../libs/css/components.scss";
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.u-input {
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    @include flex(row);
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    align-items: center;
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    justify-content: space-between;
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    flex: 1;
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    &--radius,
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    &--square {
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        border-radius: 4px;
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    }
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    &--no-radius {
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        border-radius: 0;
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    }
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    &--circle {
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        border-radius: 100px;
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    }
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    &__content {
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        flex: 1;
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        @include flex(row);
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        align-items: center;
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        justify-content: space-between;
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        &__field {
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            position: relative;
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            @include flex;
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            margin: 0;
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            line-height: 26px;
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            text-align: left;
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            color: $u-main-color;
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            height: 24px;
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            font-size: 15px;
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            flex: 1;
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        }
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        &__clear {
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            width: 20px;
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            height: 20px;
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            border-radius: 100px;
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            background-color: #c6c7cb;
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            @include flex(row);
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            align-items: center;
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            justify-content: center;
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            transform: scale(0.82);
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            margin-left: 4px;
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        }
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        &__subfix-icon {
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            margin-left: 4px;
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        }
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        &__prefix-icon {
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            margin-right: 4px;
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        }
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    }
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}
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</style>
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