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2022-06-21 4efeb31d5b4921d7e851c256009486ad86bc70e2
uview-ui/components/u-button/u-button.vue
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<template>
   <button
      id="u-wave-btn"
      class="u-btn u-line-1 u-fix-ios-appearance"
      :class="[
         'u-size-' + size,
         plain ? 'u-btn--' + type + '--plain' : '',
         loading ? 'u-loading' : '',
         shape == 'circle' ? 'u-round-circle' : '',
         hairLine ? showHairLineBorder : 'u-btn--bold-border',
         'u-btn--' + type,
         disabled ? `u-btn--${type}--disabled` : '',
      ]"
      :hover-start-time="Number(hoverStartTime)"
      :hover-stay-time="Number(hoverStayTime)"
      :disabled="disabled"
      :form-type="formType"
      :open-type="openType"
      :app-parameter="appParameter"
      :hover-stop-propagation="hoverStopPropagation"
      :send-message-title="sendMessageTitle"
      send-message-path="sendMessagePath"
      :lang="lang"
      :data-name="dataName"
      :session-from="sessionFrom"
      :send-message-img="sendMessageImg"
      :show-message-card="showMessageCard"
      @getphonenumber="getphonenumber"
      @getuserinfo="getuserinfo"
      @error="error"
      @opensetting="opensetting"
      @launchapp="launchapp"
      :style="[customStyle, {
         overflow: ripple ? 'hidden' : 'visible'
      }]"
      @tap.stop="click($event)"
      :hover-class="getHoverClass"
      :loading="loading"
   >
      <slot></slot>
      <view
         v-if="ripple"
         class="u-wave-ripple"
         :class="[waveActive ? 'u-wave-active' : '']"
         :style="{
            top: rippleTop + 'px',
            left: rippleLeft + 'px',
            width: fields.targetWidth + 'px',
            height: fields.targetWidth + 'px',
            'background-color': rippleBgColor || 'rgba(0, 0, 0, 0.15)'
         }"
      ></view>
   </button>
</template>
<script>
/**
 * button 按钮
 * @description Button 按钮
 * @tutorial https://www.uviewui.com/components/button.html
 * @property {String} size 按钮的大小
 * @property {Boolean} ripple 是否开启点击水波纹效果
 * @property {String} ripple-bg-color 水波纹的背景色,ripple为true时有效
 * @property {String} type 按钮的样式类型
 * @property {Boolean} plain 按钮是否镂空,背景色透明
 * @property {Boolean} disabled 是否禁用
 * @property {Boolean} hair-line 是否显示按钮的细边框(默认true)
 * @property {Boolean} shape 按钮外观形状,见文档说明
 * @property {Boolean} loading 按钮名称前是否带 loading 图标(App-nvue 平台,在 ios 上为雪花,Android上为圆圈)
 * @property {String} form-type 用于 <form> 组件,点击分别会触发 <form> 组件的 submit/reset 事件
 * @property {String} open-type 开放能力
 * @property {String} data-name 额外传参参数,用于小程序的data-xxx属性,通过target.dataset.name获取
 * @property {String} hover-class 指定按钮按下去的样式类。当 hover-class="none" 时,没有点击态效果(App-nvue 平台暂不支持)
 * @property {Number} hover-start-time 按住后多久出现点击态,单位毫秒
 * @property {Number} hover-stay-time 手指松开后点击态保留时间,单位毫秒
 * @property {Object} custom-style 对按钮的自定义样式,对象形式,见文档说明
 * @event {Function} click 按钮点击
 * @event {Function} getphonenumber open-type="getPhoneNumber"时有效
 * @event {Function} getuserinfo 用户点击该按钮时,会返回获取到的用户信息,从返回参数的detail中获取到的值同uni.getUserInfo
 * @event {Function} error 当使用开放能力时,发生错误的回调
 * @event {Function} opensetting 在打开授权设置页并关闭后回调
 * @event {Function} launchapp 打开 APP 成功的回调
 * @example <u-button>月落</u-button>
 */
export default {
   name: 'u-button',
   props: {
      // 是否细边框
      hairLine: {
         type: Boolean,
         default: true
      },
      // 按钮的预置样式,default,primary,error,warning,success
      type: {
         type: String,
         default: 'default'
      },
      // 按钮尺寸,default,medium,mini
      size: {
         type: String,
         default: 'default'
      },
      // 按钮形状,circle(两边为半圆),square(带圆角)
      shape: {
         type: String,
         default: 'square'
      },
      // 按钮是否镂空
      plain: {
         type: Boolean,
         default: false
      },
      // 是否禁止状态
      disabled: {
         type: Boolean,
         default: false
      },
      // 是否加载中
      loading: {
         type: Boolean,
         default: false
      },
      // 开放能力,具体请看uniapp稳定关于button组件部分说明
      // https://uniapp.dcloud.io/component/button
      openType: {
         type: String,
         default: ''
      },
      // 用于 <form> 组件,点击分别会触发 <form> 组件的 submit/reset 事件
      // 取值为submit(提交表单),reset(重置表单)
      formType: {
         type: String,
         default: ''
      },
      // 打开 APP 时,向 APP 传递的参数,open-type=launchApp时有效
      // 只微信小程序、QQ小程序有效
      appParameter: {
         type: String,
         default: ''
      },
      // 指定是否阻止本节点的祖先节点出现点击态,微信小程序有效
      hoverStopPropagation: {
         type: Boolean,
         default: false
      },
      // 指定返回用户信息的语言,zh_CN 简体中文,zh_TW 繁体中文,en 英文。只微信小程序有效
      lang: {
         type: String,
         default: 'en'
      },
      // 会话来源,open-type="contact"时有效。只微信小程序有效
      sessionFrom: {
         type: String,
         default: ''
      },
      // 会话内消息卡片标题,open-type="contact"时有效
      // 默认当前标题,只微信小程序有效
      sendMessageTitle: {
         type: String,
         default: ''
      },
      // 会话内消息卡片点击跳转小程序路径,open-type="contact"时有效
      // 默认当前分享路径,只微信小程序有效
      sendMessagePath: {
         type: String,
         default: ''
      },
      // 会话内消息卡片图片,open-type="contact"时有效
      // 默认当前页面截图,只微信小程序有效
      sendMessageImg: {
         type: String,
         default: ''
      },
      // 是否显示会话内消息卡片,设置此参数为 true,用户进入客服会话会在右下角显示"可能要发送的小程序"提示,
      // 用户点击后可以快速发送小程序消息,open-type="contact"时有效
      showMessageCard: {
         type: Boolean,
         default: false
      },
      // 手指按(触摸)按钮时按钮时的背景颜色
      hoverBgColor: {
         type: String,
         default: ''
      },
      // 水波纹的背景颜色
      rippleBgColor: {
         type: String,
         default: ''
      },
      // 是否开启水波纹效果
      ripple: {
         type: Boolean,
         default: false
      },
      // 按下的类名
      hoverClass: {
         type: String,
         default: ''
      },
      // 自定义样式,对象形式
      customStyle: {
         type: Object,
         default() {
            return {};
         }
      },
      // 额外传参参数,用于小程序的data-xxx属性,通过target.dataset.name获取
      dataName: {
         type: String,
         default: ''
      },
      // 节流,一定时间内只能触发一次
      throttleTime: {
         type: [String, Number],
         default: 1000
      },
      // 按住后多久出现点击态,单位毫秒
      hoverStartTime: {
         type: [String, Number],
         default: 20
      },
      // 手指松开后点击态保留时间,单位毫秒
      hoverStayTime: {
         type: [String, Number],
         default: 150
      },
   },
   computed: {
      // 当没有传bgColor变量时,按钮按下去的颜色类名
      getHoverClass() {
         // 如果开启水波纹效果,则不启用hover-class效果
         if (this.loading || this.disabled || this.ripple || this.hoverClass) return '';
         let hoverClass = '';
         hoverClass = this.plain ? 'u-' + this.type + '-plain-hover' : 'u-' + this.type + '-hover';
         return hoverClass;
      },
      // 在'primary', 'success', 'error', 'warning'类型下,不显示边框,否则会造成四角有毛刺现象
      showHairLineBorder() {
         if (['primary', 'success', 'error', 'warning'].indexOf(this.type) >= 0 && !this.plain) {
            return '';
         } else {
            return 'u-hairline-border';
         }
      }
   },
   data() {
      return {
         rippleTop: 0, // 水波纹的起点Y坐标到按钮上边界的距离
         rippleLeft: 0, // 水波纹起点X坐标到按钮左边界的距离
         fields: {}, // 波纹按钮节点信息
         waveActive: false // 激活水波纹
      };
   },
   methods: {
      // 按钮点击
      click(e) {
         // 进行节流控制,每this.throttle毫秒内,只在开始处执行
         this.$u.throttle(() => {
            // 如果按钮时disabled和loading状态,不触发水波纹效果
            if (this.loading === true || this.disabled === true) return;
            // 是否开启水波纹效果
            if (this.ripple) {
               // 每次点击时,移除上一次的类,再次添加,才能触发动画效果
               this.waveActive = false;
               this.$nextTick(function() {
                  this.getWaveQuery(e);
               });
            }
            this.$emit('click', e);
         }, this.throttleTime);
      },
      // 查询按钮的节点信息
      getWaveQuery(e) {
         this.getElQuery().then(res => {
            // 查询返回的是一个数组节点
            let data = res[0];
            // 查询不到节点信息,不操作
            if (!data.width || !data.width) return;
            // 水波纹的最终形态是一个正方形(通过border-radius让其变为一个圆形),这里要保证正方形的边长等于按钮的最长边
            // 最终的方形(变换后的圆形)才能覆盖整个按钮
            data.targetWidth = data.height > data.width ? data.height : data.width;
            if (!data.targetWidth) return;
            this.fields = data;
            let touchesX = '',
               touchesY = '';
            // #ifdef MP-BAIDU
            touchesX = e.changedTouches[0].clientX;
            touchesY = e.changedTouches[0].clientY;
            // #endif
            // #ifdef MP-ALIPAY
            touchesX = e.detail.clientX;
            touchesY = e.detail.clientY;
            // #endif
            // #ifndef MP-BAIDU || MP-ALIPAY
            touchesX = e.touches[0].clientX;
            touchesY = e.touches[0].clientY;
            // #endif
            // 获取触摸点相对于按钮上边和左边的x和y坐标,原理是通过屏幕的触摸点(touchesY),减去按钮的上边界data.top
            // 但是由于`transform-origin`默认是center,所以这里再减去半径才是水波纹view应该的位置
            // 总的来说,就是把水波纹的矩形(变换后的圆形)的中心点,移动到我们的触摸点位置
            this.rippleTop = touchesY - data.top - data.targetWidth / 2;
            this.rippleLeft = touchesX - data.left - data.targetWidth / 2;
            this.$nextTick(() => {
               this.waveActive = true;
            });
         });
      },
      // 获取节点信息
      getElQuery() {
         return new Promise(resolve => {
            let queryInfo = '';
            // 获取元素节点信息,请查看uniapp相关文档
            // https://uniapp.dcloud.io/api/ui/nodes-info?id=nodesrefboundingclientrect
            queryInfo = uni.createSelectorQuery().in(this);
            //#ifdef MP-ALIPAY
            queryInfo = uni.createSelectorQuery();
            //#endif
            queryInfo.select('.u-btn').boundingClientRect();
            queryInfo.exec(data => {
               resolve(data);
            });
         });
      },
      // 下面为对接uniapp官方按钮开放能力事件回调的对接
      getphonenumber(res) {
         this.$emit('getphonenumber', res);
      },
      getuserinfo(res) {
         this.$emit('getuserinfo', res);
      },
      error(res) {
         this.$emit('error', res);
      },
      opensetting(res) {
         this.$emit('opensetting', res);
      },
      launchapp(res) {
         this.$emit('launchapp', res);
      }
   }
};
</script>
<style scoped lang="scss">
@import '../../libs/css/style.components.scss';
.u-btn::after {
   border: none;
}
.u-btn {
   position: relative;
   border: 0;
   //border-radius: 10rpx;
   /* #ifndef APP-NVUE */
   display: inline-flex;
   /* #endif */
   // 避免边框某些场景可能被“裁剪”,不能设置为hidden
   overflow: visible;
   line-height: 1;
   @include vue-flex;
   align-items: center;
   justify-content: center;
   cursor: pointer;
   padding: 0 40rpx;
   z-index: 1;
   box-sizing: border-box;
   transition: all 0.15s;
   &--bold-border {
      border: 1px solid #ffffff;
   }
   &--default {
      color: $u-content-color;
      border-color: #c0c4cc;
      background-color: #ffffff;
   }
   &--primary {
      color: #ffffff;
      border-color: $u-type-primary;
      background-color: $u-type-primary;
   }
   &--success {
      color: #ffffff;
      border-color: $u-type-success;
      background-color: $u-type-success;
   }
   &--error {
      color: #ffffff;
      border-color: $u-type-error;
      background-color: $u-type-error;
   }
   &--warning {
      color: #ffffff;
      border-color: $u-type-warning;
      background-color: $u-type-warning;
   }
   &--default--disabled {
      color: #ffffff;
      border-color: #e4e7ed;
      background-color: #ffffff;
   }
   &--primary--disabled {
      color: #ffffff!important;
      border-color: $u-type-primary-disabled!important;
      background-color: $u-type-primary-disabled!important;
   }
   &--success--disabled {
      color: #ffffff!important;
      border-color: $u-type-success-disabled!important;
      background-color: $u-type-success-disabled!important;
   }
   &--error--disabled {
      color: #ffffff!important;
      border-color: $u-type-error-disabled!important;
      background-color: $u-type-error-disabled!important;
   }
   &--warning--disabled {
      color: #ffffff!important;
      border-color: $u-type-warning-disabled!important;
      background-color: $u-type-warning-disabled!important;
   }
   &--primary--plain {
      color: $u-type-primary!important;
      border-color: $u-type-primary-disabled!important;
      background-color: $u-type-primary-light!important;
   }
   &--success--plain {
      color: $u-type-success!important;
      border-color: $u-type-success-disabled!important;
      background-color: $u-type-success-light!important;
   }
   &--error--plain {
      color: $u-type-error!important;
      border-color: $u-type-error-disabled!important;
      background-color: $u-type-error-light!important;
   }
   &--warning--plain {
      color: $u-type-warning!important;
      border-color: $u-type-warning-disabled!important;
      background-color: $u-type-warning-light!important;
   }
}
.u-hairline-border:after {
   content: ' ';
   position: absolute;
   pointer-events: none;
   // 设置为border-box,意味着下面的scale缩小为0.5,实际上缩小的是伪元素的内容(border-box意味着内容不含border)
   box-sizing: border-box;
   // 中心点作为变形(scale())的原点
   -webkit-transform-origin: 0 0;
   transform-origin: 0 0;
   left: 0;
   top: 0;
   width: 199.8%;
   height: 199.7%;
   -webkit-transform: scale(0.5, 0.5);
   transform: scale(0.5, 0.5);
   border: 1px solid currentColor;
   z-index: 1;
}
.u-wave-ripple {
   z-index: 0;
   position: absolute;
   border-radius: 100%;
   background-clip: padding-box;
   pointer-events: none;
   user-select: none;
   transform: scale(0);
   opacity: 1;
   transform-origin: center;
}
.u-wave-ripple.u-wave-active {
   opacity: 0;
   transform: scale(2);
   transition: opacity 1s linear, transform 0.4s linear;
}
.u-round-circle {
   border-radius: 100rpx;
}
.u-round-circle::after {
   border-radius: 100rpx;
}
.u-loading::after {
   background-color: hsla(0, 0%, 100%, 0.35);
}
.u-size-default {
   font-size: 30rpx;
   height: 80rpx;
   line-height: 80rpx;
}
.u-size-medium {
   /* #ifndef APP-NVUE */
   display: inline-flex;
   /* #endif */
   width: auto;
   font-size: 26rpx;
   height: 70rpx;
   line-height: 70rpx;
   padding: 0 80rpx;
}
.u-size-mini {
   /* #ifndef APP-NVUE */
   display: inline-flex;
   /* #endif */
   width: auto;
   font-size: 22rpx;
   padding-top: 1px;
   height: 50rpx;
   line-height: 50rpx;
   padding: 0 20rpx;
}
.u-primary-plain-hover {
   color: #ffffff !important;
   background: $u-type-primary-dark !important;
}
.u-default-plain-hover {
   color: $u-type-primary-dark !important;
   background: $u-type-primary-light !important;
}
.u-success-plain-hover {
   color: #ffffff !important;
   background: $u-type-success-dark !important;
}
.u-warning-plain-hover {
   color: #ffffff !important;
   background: $u-type-warning-dark !important;
}
.u-error-plain-hover {
   color: #ffffff !important;
   background: $u-type-error-dark !important;
}
.u-info-plain-hover {
   color: #ffffff !important;
   background: $u-type-info-dark !important;
}
.u-default-hover {
   color: $u-type-primary-dark !important;
   border-color: $u-type-primary-dark !important;
   background-color: $u-type-primary-light !important;
}
.u-primary-hover {
   background: $u-type-primary-dark !important;
   color: #fff;
}
.u-success-hover {
   background: $u-type-success-dark !important;
   color: #fff;
}
.u-info-hover {
   background: $u-type-info-dark !important;
   color: #fff;
}
.u-warning-hover {
   background: $u-type-warning-dark !important;
   color: #fff;
}
.u-error-hover {
   background: $u-type-error-dark !important;
   color: #fff;
}
</style>