New Huajishe Check ChaoXing
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title: ImageViewer 图片预览
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description: 图片全屏放大预览效果,包含全屏背景色、页码位置样式、增加操作等规范。
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spline: data
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isComponent: true
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---
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<span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20lines-90%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20functions-88%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20statements-90%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20branches-88%25-blue" /></span>
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<div style="background: #ecf2fe; display: flex; align-items: center; line-height: 20px; padding: 14px 24px; border-radius: 3px; color: #555a65">
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<svg fill="none" viewBox="0 0 16 16" width="16px" height="16px" style="margin-right: 5px">
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<path fill="#0052d9" d="M8 15A7 7 0 108 1a7 7 0 000 14zM7.4 4h1.2v1.2H7.4V4zm.1 2.5h1V12h-1V6.5z" fillOpacity="0.9"></path>
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</svg>
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该组件于 0.10.0 版本上线,请留意版本。
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</div>
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## 引入
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全局引入,在 miniprogram 根目录下的`app.json`中配置,局部引入,在需要引入的页面或组件的`index.json`中配置。
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```json
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"usingComponents": {
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"t-image-viewer": "tdesign-miniprogram/image-viewer/image-viewer",
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}
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```
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## 代码演示
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<a href="https://developers.weixin.qq.com/s/9k7luimk7nSy" title="在开发者工具中预览效果" target="_blank" rel="noopener noreferrer"> 在开发者工具中预览效果 </a>
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<blockquote style="background-color: #d9e1ff; font-size: 15px; line-height: 26px;margin: 16px 0 0;padding: 16px; border-radius: 6px; color: #0052d9" >
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<p>Tips: 请确保开发者工具为打开状态。导入开发者工具后,依次执行:npm i > 构建npm包 > 勾选 "将JS编译成ES5"</p>
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</blockquote>
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### 类型
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#### 基础图片预览
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{{ base }}
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#### 带操作图片预览
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顶部区域可以配置关闭按钮、页码信息、删除按钮。
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{{ delete }}
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> 当使用自定义导航栏的时候,顶部的操作按钮会被遮挡,此时需要开启 `using-custom-navbar` 来解决
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## API
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### ImageViewer Props
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名称 | 类型 | 默认值 | 描述 | 必传
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-- | -- | -- | -- | --
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style | Object | - | 样式 | N
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custom-style | Object | - | 样式,一般用于开启虚拟化组件节点场景 | N
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background-color | String | 'rgba(0, 0, 0, 1)' | 遮罩的背景颜色 | N
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close-btn | String / Boolean / Object / Slot | false | 是否显示关闭操作,前提需要开启页码。值为字符串表示图标名称,值为 `true` 表示使用默认图标 `close`,值为 `Object` 类型,表示透传至 `icon` ,不传表示不显示图标。[通用类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
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delete-btn | String / Boolean / Object / Slot | false | 是否显示删除操作,前提需要开启页码。值为字符串表示图标名称,值为 `true` 表示使用默认图标 `delete`,值为 `Object` 类型,表示透传至 `icon`,不传表示不显示图标。[通用类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
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images | Array | [] | 图片数组。TS 类型:`Array<string>` | N
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initial-index | Number | 0 | 初始化页码。TS 类型:`Number` | N
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show-index | Boolean | false | 是否显示页码 | N
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using-custom-navbar | Boolean | false | `v1.1.4`。是否使用了自定义导航栏 | N
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visible | Boolean | false | 隐藏/显示预览 | N
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default-visible | Boolean | undefined | 隐藏/显示预览。非受控属性 | N
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### ImageViewer Events
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名称 | 参数 | 描述
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-- | -- | --
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change | `(index: Number)` | 翻页时回调
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close | `(trigger: 'overlay' \| 'button', visible: Boolean, index: Number)` | 点击操作按钮button或者overlay时触发
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delete | `(index: Number)` | 点击删除操作按钮时触发
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### CSS Variables
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组件提供了下列 CSS 变量,可用于自定义样式。
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名称 | 默认值 | 描述
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-- | -- | --
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--td-image-viewer-close-margin-left | @spacer-1 | -
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--td-image-viewer-delete-margin-right | @spacer-1 | -
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--td-image-viewer-nav-bg-color | @font-gray-3 | -
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--td-image-viewer-nav-color | @font-white-1 | -
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--td-image-viewer-nav-height | 96rpx | -
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--td-image-viewer-nav-index-font-size | @font-size-base | -
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--td-image-viewer-top | @position-fixed-top | -
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