239 lines
8.2 KiB
Markdown
239 lines
8.2 KiB
Markdown
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# Clipper 图片裁剪
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> uniapp 图片裁剪，可用于图片头像等裁剪处理
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> [查看更多 站点1](https://limeui.qcoon.cn/#/clipper) <br>
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> [查看更多 站点2](http://liangei.gitee.io/limeui/#/clipper) <br>
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> Q群：1169785031
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## 平台兼容
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| H5 | 微信小程序 | 支付宝小程序 | 百度小程序 | 头条小程序 | QQ 小程序 | App |
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| --- | ---------- | ------------ | ---------- | ---------- | --------- | --- |
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| √ | √ | √ | 未测 | √ | √ | √ |
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## 安装
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在市场导入**[图片剪刀](https://ext.dcloud.net.cn/plugin?id=3594)uni_modules**版本的即可，无需`import`
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## 代码演示
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### 基本用法
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`@success` 事件点击 👉 **确定** 后会返回生成的图片信息，包含 `url`、`width`、`height`
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```html
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<image :src="url" v-if="url" mode="widthFix"></image>
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<l-clipper v-if="show" @success="url = $event.url; show = false" @cancel="show = false" />
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<button @tap="show = true">裁剪</button>
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```
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```js
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export default {
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data() {
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return {
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show: false,
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url: '',
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}
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}
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}
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```
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### 传入图片
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`image-url`可传入**相对路径**、**临时路径**、**本地路径**、**网络图片**<br>
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* **当为网络地址时**
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* H5：👉 需要解决跨域问题。 <br>
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* 小程序：👉 需要配置 downloadFile 域名 <br>
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```html
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<image :src="url" v-if="url" mode="widthFix"></image>
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<l-clipper v-if="show" :image-url="imageUrl" @success="url = $event.url; show = false" @cancel="show = false" />
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<button @tap="show = true">裁剪</button>
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```
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```js
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export default {
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data() {
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return {
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imageUrl: 'https://img12.360buyimg.com/pop/s1180x940_jfs/t1/97205/26/1142/87801/5dbac55aEf795d962/48a4d7a63ff80b8b.jpg',
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show: false,
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url: '',
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}
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}
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}
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```
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### 确定按钮颜色
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样式变量名：`--clipper_confirm_color`, `nvue` 无效, `nvue`需要通过挂载全局样式表实现。
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可放到全局样式的 `page` 里或节点的 `style`
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```html
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<l-clipper class="clipper" style="--clipper_confirm_color: linear-gradient(to right, #ff6034, #ee0a24)" />
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```
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```css
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// css 中为组件设置 CSS 变量
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.clipper {
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--clipper_confirm_color: linear-gradient(to right, #ff6034, #ee0a24)
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}
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// 全局
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page {
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--clipper_confirm_color: linear-gradient(to right, #ff6034, #ee0a24)
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}
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```
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### 使用插槽
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共五个插槽 `cancel` 取消按钮、 `photo` 选择图片按钮、 `rotate` 旋转按钮、 `confirm` 确定按钮和默认插槽。
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```html
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<image :src="url" v-if="url" mode="widthFix"></image>
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<l-clipper
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v-if="show"
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:isLockWidth="isLockWidth"
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:isLockHeight="isLockHeight"
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:isLockRatio="isLockRatio"
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:isLimitMove="isLimitMove"
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:isDisableScale="isDisableScale"
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:isDisableRotate="isDisableRotate"
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:isShowCancelBtn="isShowCancelBtn"
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:isShowPhotoBtn="isShowPhotoBtn"
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:isShowRotateBtn="isShowRotateBtn"
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:isShowConfirmBtn="isShowConfirmBtn"
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@success="url = $event.url; show = false"
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@cancel="show = false" >
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<!-- 四个基本按钮插槽 -->
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<view slot="cancel">取消</view>
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<view slot="photo">选择图片</view>
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<view slot="rotate">旋转</view>
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<view slot="confirm">确定</view>
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<!-- 默认插槽 -->
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<view class="tools">
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<view>显示取消按钮
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<switch :checked="isShowCancelBtn" @change="isShowCancelBtn = $event.target.value" />
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</view>
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<view>显示选择图片按钮
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<switch :checked="isShowPhotoBtn" @change="isShowPhotoBtn = $event.target.value" />
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</view>
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<view>显示旋转按钮
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<switch :checked="isShowRotateBtn" @change="isShowRotateBtn = $event.target.value" />
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</view>
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<view>显示确定按钮
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<switch :checked="isShowConfirmBtn" @change="isShowConfirmBtn = $event.target.value" />
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</view>
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<view>锁定裁剪框宽度
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<switch :checked="isLockWidth" @change="isLockWidth = $event.target.value" />
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</view>
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<view>锁定裁剪框高度
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<switch :checked="isLockHeight" @change="isLockHeight = $event.target.value" />
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</view>
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<view>锁定裁剪框比例
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<switch :checked="isLockRatio" @change="isLockRatio = $event.target.value" />
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</view>
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<view>限制移动范围
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<switch :checked="isLimitMove" @change="isLimitMove = $event.target.value" />
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</view>
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<view>禁止缩放
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<switch :checked="isDisableScale" @change="isDisableScale = $event.target.value" />
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</view>
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<view>禁止旋转
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<switch :checked="isDisableRotate" @change="isDisableRotate = $event.target.value" />
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</view>
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</view>
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</l-clipper>
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<button @tap="show = true">裁剪</button>
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```
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```js
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export default {
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data() {
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return {
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show: false,
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url: '',
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isLockWidth: false,
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isLockHeight: false,
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isLockRatio: true,
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isLimitMove: false,
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isDisableScale: false,
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isDisableRotate: false,
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isShowCancelBtn: true,
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isShowPhotoBtn: true,
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isShowRotateBtn: true,
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isShowConfirmBtn: true
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}
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}
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}
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```
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### 查看示例
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- 导入后直接使用这个标签查看演示效果
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```html
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<!-- // 代码位于 uni_modules/lime-clipper/compoents/lime-clipper -->
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<lime-clipper />
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```
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### 插件标签
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- 默认 l-clipper 为 component
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- 默认 lime-clipper 为 demo
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## API
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### Props
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| 参数 | 说明 | 类型 | 默认值 |
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| ------------- | ------------ | ---------------- | ------------ |
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| image-url | 图片路径 | <em>string</em> | |
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| quality | 图片的质量，取值范围为 [0, 1]，不在范围内时当作1处理 | <em>number</em> | `1` |
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| source | `{album: '从相册中选择'}`key为图片来源类型，value为选项说明 | <em>Object</em> | |
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| width | 裁剪框宽度，单位为 `rpx` | <em>number</em> | `400` |
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| height | 裁剪框高度 | <em>number</em> | `400` |
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| min-width | 裁剪框最小宽度 | <em>number</em> | `200` |
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| min-height |裁剪框最小高度 | <em>number</em> | `200` |
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| max-width | 裁剪框最大宽度 | <em>number</em> | `600` |
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| max-height | 裁剪框最大宽度 | <em>number</em> | `600` |
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| min-ratio | 图片最小缩放比 | <em>number</em> | `0.5` |
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| max-ratio | 图片最大缩放比 | <em>number</em> | `2` |
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| rotate-angle | 旋转按钮每次旋转的角度 | <em>number</em> | `90` |
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| scale-ratio | 生成图片相对于裁剪框的比例， **比例越高生成图片越清晰** | <em>number</em> | `1` |
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| is-lock-width | 是否锁定裁剪框宽度 | <em>boolean</em> | `false` |
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| is-lock-height | 是否锁定裁剪框高度上 | <em>boolean</em> | `false` |
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| is-lock-ratio | 是否锁定裁剪框比例 | <em>boolean</em> | `true` |
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| is-disable-scale | 是否禁止缩放 | <em>boolean</em> | `false` |
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| is-disable-rotate | 是否禁止旋转 | <em>boolean</em> | `false` |
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| is-limit-move | 是否限制移动范围 | <em>boolean</em> | `false` |
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| is-show-photo-btn | 是否显示选择图片按钮 | <em>boolean</em> | `true` |
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| is-show-rotate-btn | 是否显示转按钮 | <em>boolean</em> | `true` |
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| is-show-confirm-btn | 是否显示确定按钮 | <em>boolean</em> | `true` |
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| is-show-cancel-btn | 是否显示关闭按钮 | <em>boolean</em> | `true` |
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### 事件 Events
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| 事件名 | 说明 | 回调 |
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| success | 生成图片成功 | {`width`, `height`, `url`} |
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| fail | 生成图片失败 | `error` |
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| cancel | 关闭 | `false` |
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| ready | 图片加载完成 | {`width`, `height`, `path`, `orientation`, `type`} |
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| change | 图片大小改变时触发 | {`width`, `height`} |
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| rotate | 图片旋转时触发 | `angle` |
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## 常见问题
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- 1、H5端使用网络图片需要解决跨域问题。
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- 2、小程序使用网络图片需要去公众平台增加下载白名单！二级域名也需要配！
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- 3、H5端生成图片是base64，有时显示只有一半可以使用原生标签`<IMG/>`
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- 4、IOS APP 请勿使用HBX2.9.3.20201014的版本！这个版本无法生成图片。
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- 5、APP端无成功反馈、也无失败反馈时，请更新基座和HBX。
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## 打赏
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如果你觉得本插件，解决了你的问题，赠人玫瑰，手留余香。
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