355 lines
		
	
	
		
			15 KiB
		
	
	
	
		
			Vue
		
	
	
	
			
		
		
	
	
			355 lines
		
	
	
		
			15 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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|             <view class="u-input__content__field-wrapper" @tap="clickHandler">
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| 				<!-- 根据uni-app的input组件文档,H5和APP中只要声明了password参数(无论true还是false),type均失效,此时
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| 					为了防止type=number时,又存在password属性,type无效,此时需要设置password为undefined
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| 				 -->
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|             	<input
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|             	    class="u-input__content__field-wrapper__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 || readonly"
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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' || undefined"
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|                     :ignoreCompositionEvent="ignoreCompositionEvent"
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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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|             	/>
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|             </view>
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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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| 
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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 {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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|  * @property {Boolean}			ignoreCompositionEvent	是否忽略组件内对文本合成系统事件的处理。
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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.$u.deepMerge(style, uni.$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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| 
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| <style lang="scss" scoped>
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| @import "../../libs/css/components.scss";
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| 
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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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| 
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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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| 
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|     &--no-radius {
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|         border-radius: 0;
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|     }
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| 
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|     &--circle {
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|         border-radius: 100px;
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|     }
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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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| 
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|         &__field-wrapper {
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|             position: relative;
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|             @include flex(row);
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|             margin: 0;
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|             flex: 1;
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| 			
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| 			&__field {
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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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|         }
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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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| 
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|         &__subfix-icon {
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|             margin-left: 4px;
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|         }
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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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