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 |
---|---|---|---|---|---|---|
√ | √ | √ | 未测 | √ | √ | √ |
在市场导入海报画板uni_modules版本的即可,无需import
l-painter-view
、l-painter-text
、l-painter-image
、l-painter-qrcode
四种类型组件css
属性绘制样式,与 style 使用方式保持一致。
html
<l-painter>
//如果使用XML出现顺序错乱,可使用`template` 等所有变量完成再显示
<template v-if="show">
<l-painter-view
css="background: #07c160; height: 120rpx; width: 120rpx; display: inline-block"
></l-painter-view>
<l-painter-view
css="background: #1989fa; height: 120rpx; width: 120rpx; border-top-right-radius: 60rpx; border-bottom-left-radius: 60rpx; display: inline-block; margin: 0 30rpx;"
></l-painter-view>
<l-painter-view
css="background: #ff9d00; height: 120rpx; width: 120rpx; border-radius: 50%; display: inline-block"
></l-painter-view>
<template>
</l-painter>
type
为view
、text
、image
、qrcode
board
设置海报所需的 JSON 数据进行绘制或ref
获取组件实例调用组件内的render(json)
css
字段,css 的 key 值使用驼峰如:lineHeight
<l-painter :board="poster"/>
data() {
return {
poster: {
css: {
// 根节点若无尺寸,自动获取父级节点
width: '750rpx'
},
views: [
{
css: {
background: "#07c160",
height: "120rpx",
width: "120rpx",
display: "inline-block"
},
type: "view"
},
{
css: {
background: "#1989fa",
height: "120rpx",
width: "120rpx",
borderTopRightRadius: "60rpx",
borderBottomLeftRadius: "60rpx",
display: "inline-block",
margin: "0 30rpx"
},
views: [],
type: "view"
},
{
css: {
background: "#ff9d00",
height: "120rpx",
width: "120rpx",
borderRadius: "50%",
display: "inline-block"
},
views: [],
type: "view"
},
]
}
}
}
div
可以嵌套承载更多的 view、text、image,qrcode 共同构建一颗完整的节点树views
的数组字段,用于嵌套承载节点。<l-painter>
<l-painter-view css="background: #f0f0f0; padding-top: 100rpx;">
<l-painter-view
css="background: #d9d9d9; width: 33.33%; height: 100rpx; display: inline-block"
></l-painter-view>
<l-painter-view
css="background: #bfbfbf; width: 66.66%; height: 100rpx; display: inline-block"
></l-painter-view>
</l-painter-view>
</l-painter>
{
css: {},
views: [
{
type: 'view',
css: {
background: '#f0f0f0',
paddingTop: '100rpx'
},
views: [
{
type: 'view',
css: {
background: '#d9d9d9',
width: '33.33%',
height: '100rpx',
display: 'inline-block'
}
},
{
type: 'view',
css: {
background: '#bfbfbf',
width: '66.66%',
height: '100rpx',
display: 'inline-block'
}
}
],
}
]
}
text
属性填写文本内容。\n
换行符line-clamp
设置行数,当文字内容超过会显示省略号。text-decoration
<l-painter>
<l-painter-view css="background: #e0e2db; padding: 30rpx; color: #222a29">
<l-painter-text
text="登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼"
/>
<l-painter-text
text="登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼"
css="text-align:center; padding-top: 20rpx; text-decoration: line-through "
/>
<l-painter-text
text="登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼"
css="text-align:right; padding-top: 20rpx"
/>
<l-painter-text
text="水调歌头\n明月几时有?把酒问青天。不知天上宫阙,今夕是何年。我欲乘风归去,又恐琼楼玉宇,高处不胜寒。起舞弄清影,何似在人间。"
css="line-clamp: 3; padding-top: 20rpx; background: linear-gradient(,#ff971b 0%, #ff5000 100%); background-clip: text"
/>
</l-painter-view>
</l-painter>
// 基础用法
{
type: 'text',
text: '登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼',
},
{
type: 'text',
text: '登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼',
css: {
// 设置居中对齐
textAlign: 'center',
// 设置中划线
textDecoration: 'line-through'
}
},
{
type: 'text',
text: '登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼',
css: {
// 设置右对齐
textAlign: 'right',
}
},
{
type: 'text',
text: '登鹳雀楼\n白日依山尽,黄河入海流\n欲穷千里目,更上一层楼',
css: {
// 设置行数,超出显示省略号
lineClamp: 3,
// 渐变文字
background: 'linear-gradient(,#ff971b 0%, #1989fa 100%)',
backgroundClip: 'text'
}
}
src
属性填写图片路径。css
的 object-fit
属性可以设置图片的填充方式,可选值见下方 CSS 表格。css
的 object-position
配合 object-fit
可以设置图片的对齐方式,类似于background-position
,详情见下方 CSS 表格。<l-painter>
<!-- 基础用法 -->
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="width: 200rpx; height: 200rpx"
/>
<!-- 填充方式 -->
<!-- css object-fit 设置 填充方式 见下方表格-->
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="width: 200rpx; height: 200rpx; object-fit: contain; background: #eee"
/>
<!-- css object-position 设置 图片的对齐方式-->
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="width: 200rpx; height: 200rpx; object-fit: contain; object-position: 50% 50%; background: #eee"
/>
</l-painter>
// 基础用法
{
type: 'image',
src: 'https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg',
css: {
width: '200rpx',
height: '200rpx'
}
},
// 填充方式
// css objectFit 设置 填充方式 见下方表格
{
type: 'image',
src: 'https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg',
css: {
width: '200rpx',
height: '200rpx',
objectFit: 'contain'
}
},
// css objectPosition 设置 图片的对齐方式
{
type: 'image',
src: 'https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg',
css: {
width: '200rpx',
height: '200rpx',
objectFit: 'contain',
objectPosition: '50% 50%'
}
}
text
属性填写需要生成二维码的文本。css
里的 color
可设置生成码点的颜色。css
里的 background
可设置背景色。css
里的 width
、height
设置尺寸。<l-painter>
<l-painter-qrcode
text="limeui.qcoon.cn"
css="width: 200rpx; height: 200rpx"
/>
</l-painter>
{
type: 'qrcode',
text: 'limeui.qcoon.cn',
css: {
width: '200rpx',
height: '200rpx',
}
}
isCanvasToTempFilePath
自动生成图片并在 @success
事件里接收海报临时路径<l-painter ref="painter">...code</l-painter>
this.$refs.painter.canvasToTempFilePathSync({
fileType: "jpg",
// 如果返回的是base64是无法使用 saveImageToPhotosAlbum,需要设置 pathType为url
pathType: 'url',
quality: 1,
success: (res) => {
console.log(res.tempFilePath);
// 非H5 保存到相册
// H5 提示用户长按图另存
uni.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: function () {
console.log('save success');
}
});
},
});
render
函数 传递JSON
即可<l-painter ref="painter" />
// 渲染
this.$refs.painter.render(jsonSchema);
// 生成图片
this.$refs.painter.canvasToTempFilePathSync({
fileType: "jpg",
// 如果返回的是base64是无法使用 saveImageToPhotosAlbum,需要设置 pathType为url
pathType: 'url',
quality: 1,
success: (res) => {
console.log(res.tempFilePath);
// 非H5 保存到相册
uni.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: function () {
console.log('save success');
}
});
},
});
1、设置来源
*
2、允许Methods
GET
3、允许Headers
access-control-allow-origin:*
4、最后如果还是不行,可试下给插件设置useCORS
<l-painter useCORS>
isCanvasToTempFilePath
主动生成图片,再由 @success
事件接收海报临时路径custom-style="position: fixed; left: 200%"
样式把画板移到屏幕之外,达到隐藏画板的效果。<image :src="path" mode="widthFix"></image>
<l-painter
isCanvasToTempFilePath
@success="path = $event"
custom-style="position: fixed; left: 200%"
css="width: 750rpx; padding-bottom: 40rpx; background: linear-gradient(,#ff971b 0%, #ff5000 100%)"
>
<l-painter-image
src="https://cdn.jsdelivr.net/gh/liangei/image@latest/avatar-1.jpeg"
css="margin-left: 40rpx; margin-top: 40rpx; width: 84rpx; height: 84rpx; border-radius: 50%;"
/>
<l-painter-view
css="margin-top: 40rpx; padding-left: 20rpx; display: inline-block"
>
<l-painter-text
text="隔壁老王"
css="display: block; padding-bottom: 10rpx; color: #fff; font-size: 32rpx; fontWeight: bold"
/>
<l-painter-text
text="为您挑选了一个好物"
css="color: rgba(255,255,255,.7); font-size: 24rpx"
/>
</l-painter-view>
<l-painter-view
css="margin-left: 40rpx; margin-top: 30rpx; padding: 32rpx; box-sizing: border-box; background: #fff; border-radius: 16rpx; width: 670rpx; box-shadow: 0 20rpx 58rpx rgba(0,0,0,.15)"
>
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="object-fit: cover; object-position: 50% 50%; width: 606rpx; height: 606rpx; border-radius: 12rpx;"
/>
<l-painter-view
css="margin-top: 32rpx; color: #FF0000; font-weight: bold; font-size: 28rpx; line-height: 1em;"
>
<l-painter-text text="¥" css="vertical-align: bottom" />
<l-painter-text
text="39"
css="vertical-align: bottom; font-size: 58rpx"
/>
<l-painter-text text=".39" css="vertical-align: bottom" />
<l-painter-text
text="¥59.99"
css="vertical-align: bottom; padding-left: 10rpx; font-weight: normal; text-decoration: line-through; color: #999999"
/>
</l-painter-view>
<l-painter-view css="margin-top: 32rpx; font-size: 26rpx; color: #8c5400">
<l-painter-text text="自营" css="color: #212121; background: #ffb400;" />
<l-painter-text
text="30天最低价"
css="margin-left: 16rpx; background: #fff4d9; text-decoration: line-through;"
/>
<l-painter-text
text="满减优惠"
css="margin-left: 16rpx; background: #fff4d9"
/>
<l-painter-text
text="超高好评"
css="margin-left: 16rpx; background: #fff4d9"
/>
</l-painter-view>
<l-painter-view css="margin-top: 30rpx">
<l-painter-text
css="line-clamp: 2; color: #333333; line-height: 1.8em; font-size: 36rpx; width: 478rpx; padding-right:32rpx; box-sizing: border-box"
text="360儿童电话手表9X 智能语音问答定位支付手表 4G全网通20米游泳级防水视频通话拍照手表男女孩星空蓝"
></l-painter-text>
<l-painter-qrcode
css="width: 128rpx; height: 128rpx;"
text="limeui.qcoon.cn"
></l-painter-qrcode>
</l-painter-view>
</l-painter-view>
</l-painter>
data() {
return {
path: ''
}
}
<image :src="path" mode="widthFix"></image>
<l-painter
:board="poster"
isCanvasToTempFilePath
@success="path = $event"
custom-style="position: fixed; left: 200%"
/>
data() {
return {
path: '',
poster: {
css: {
width: "750rpx",
paddingBottom: "40rpx",
background: "linear-gradient(,#000 0%, #ff5000 100%)"
},
views: [
{
src: "https://fastly.jsdelivr.net/gh/liangei/image@latest/avatar-1.jpeg",
type: "image",
css: {
background: "#fff",
objectFit: "cover",
marginLeft: "40rpx",
marginTop: "40rpx",
width: "84rpx",
border: "2rpx solid #fff",
boxSizing: "border-box",
height: "84rpx",
borderRadius: "50%"
}
},
{
type: "view",
css: {
marginTop: "40rpx",
paddingLeft: "20rpx",
display: "inline-block"
},
views: [
{
text: "隔壁老王",
type: "text",
css: {
display: "block",
paddingBottom: "10rpx",
color: "#fff",
fontSize: "32rpx",
fontWeight: "bold"
}
},
{
text: "为您挑选了一个好物",
type: "text",
css: {
color: "rgba(255,255,255,.7)",
fontSize: "24rpx"
},
}
],
},
{
css: {
marginLeft: "40rpx",
marginTop: "30rpx",
padding: "32rpx",
boxSizing: "border-box",
background: "#fff",
borderRadius: "16rpx",
width: "670rpx",
boxShadow: "0 20rpx 58rpx rgba(0,0,0,.15)"
},
views: [
{
src: "https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg",
type: "image",
css: {
objectFit: "cover",
objectPosition: "50% 50%",
width: "606rpx",
height: "606rpx"
},
}, {
css: {
marginTop: "32rpx",
color: "#FF0000",
fontWeight: "bold",
fontSize: "28rpx",
lineHeight: "1em"
},
views: [{
text: "¥",
type: "text",
css: {
verticalAlign: "bottom"
},
}, {
text: "39",
type: "text",
css: {
verticalAlign: "bottom",
fontSize: "58rpx"
},
}, {
text: ".39",
type: "text",
css: {
verticalAlign: "bottom"
},
}, {
text: "¥59.99",
type: "text",
css: {
verticalAlign: "bottom",
paddingLeft: "10rpx",
fontWeight: "normal",
textDecoration: "line-through",
color: "#999999"
}
}],
type: "view"
}, {
css: {
marginTop: "32rpx",
fontSize: "26rpx",
color: "#8c5400"
},
views: [{
text: "自营",
type: "text",
css: {
color: "#212121",
background: "#ffb400"
},
}, {
text: "30天最低价",
type: "text",
css: {
marginLeft: "16rpx",
background: "#fff4d9",
textDecoration: "line-through"
},
}, {
text: "满减优惠",
type: "text",
css: {
marginLeft: "16rpx",
background: "#fff4d9"
},
}, {
text: "超高好评",
type: "text",
css: {
marginLeft: "16rpx",
background: "#fff4d9"
},
}],
type: "view"
}, {
css: {
marginTop: "30rpx"
},
views: [
{
text: "360儿童电话手表9X 智能语音问答定位支付手表 4G全网通20米游泳级防水视频通话拍照手表男女孩星空蓝",
type: "text",
css: {
paddingRight: "32rpx",
boxSizing: "border-box",
lineClamp: 2,
color: "#333333",
lineHeight: "1.8em",
fontSize: "36rpx",
width: "478rpx"
},
}, {
text: "limeui.qcoon.cn",
type: "qrcode",
css: {
width: "128rpx",
height: "128rpx",
},
}],
type: "view"
}],
type: "view"
}
]
}
}
}
painter.js
支持在原生小程序中使用source
里传入 JSONrender
绘制海报<canvas type="2d" id="painter" style="width: 100%"></canvas>
import { Painter } from "./painter";
page({
data: {
poster: {
css: {
width: "750rpx",
},
views: [
{
type: "view",
css: {
background: "#d2d4c8",
paddingTop: "100rpx",
},
views: [
{
type: "view",
css: {
background: "#5f7470",
width: "33.33%",
height: "100rpx",
display: "inline-block",
},
},
{
type: "view",
css: {
background: "#889696",
width: "33.33%",
height: "100rpx",
display: "inline-block",
},
},
{
type: "view",
css: {
background: "#b8bdb5",
width: "33.33%",
height: "100rpx",
display: "inline-block",
},
},
],
},
],
},
},
async onLoad() {
const res = await this.getCentext();
const painter = new Painter(res);
// 返回计算布局后的整个内容尺寸
const { width, height } = await painter.source(this.data.poster);
// 得到计算后的尺寸后 可给canvas尺寸赋值,达到动态响应效果
// 渲染
await painter.render();
},
// 获取canvas 2d
// 非2d也可以使用这里只是举个例子
getCentext() {
return new Promise((resolve) => {
wx.createSelectorQuery()
.select(`#painter`)
.node()
.exec((res) => {
let { node: canvas } = res[0];
resolve({
canvas,
context: canvas.getContext("2d"),
width: canvas.width,
height: canvas.height,
pixelRatio: 2,
});
});
});
},
});
position: absolute
image
mode 模式被放弃,使用object-fit
isRenderImage
改成 is-canvas-to-temp-filePath
maxLines
改成 line-clamp
参数 | 说明 | 类型 | 默认值 |
---|---|---|---|
board | JSON 方式的海报元素对象集 | object | - |
css | 海报最外层的样式,可以理解为body |
object | 参数请向下看 |
custom-style | canvas 自定义样式 | string | |
is-canvas-to-temp-filePath | 是否生成图片,在@success 事件接收图片地址 |
boolean | false |
after-delay | 生成图片错乱,可延时生成图片 | number | 100 |
type | canvas 类型,对微信头条支付宝小程序可有效,可选值:2d ,'' |
string | 2d |
file-type | 生成图片的后缀类型, 可选值:png 、jpg |
string | png |
path-type | 生成图片路径类型,可选值url 、base64 |
string | - |
pixel-ratio | 生成图片的像素密度,默认为对应手机的像素密度,nvue 无效 |
number | - |
width | 废弃 画板的宽度,一般只用于通过内部方法时加上 | number | `` |
height | 废弃 画板的高度 ,同上 | number | `` |
属性名 | 支持的值或类型 | 默认值 |
---|---|---|
(min\max)width | 支持% 、rpx 、px |
- |
height | 同上 | - |
color | string |
- |
position | 定位,可选值:absolute 、fixed |
- |
↳ left、top、right、bottom | 配合position 才生效,支持% 、rpx 、px |
- |
margin | 可简写或各方向分别写,如:margin-top ,支持auto 、rpx 、px |
- |
padding | 可简写或各方向分别写,支持rpx 、px |
- |
border | 可简写或各个值分开写:border-width 、border-style 、border-color ,简写请按顺序写 |
- |
line-clamp | number ,超过行数显示省略号 |
- |
vertical-align | 文字垂直对齐,可选值:bottom 、top 、middle |
middle |
line-height | 文字行高,支持rpx 、px 、em |
1.4em |
font-weight | 文字粗细,可选值:normal 、bold |
normal |
font-size | 文字大小,string ,支持rpx 、px |
14px |
text-decoration | 文本修饰,可选值:underline 、line-through 、overline |
- |
text-align | 文本水平对齐,可选值:right 、center |
left |
display | 框类型,可选值:block 、inline-block 、flex 、none ,当为none 时是不渲染该段, flex 功能简陋。 |
- |
flex | 配合 display: flex; 属性定义了在分配多余空间,目前只用为数值如: flex: 1 | - |
align-self | 配合 display: flex; 单个项目垂直轴对齐方式: flex-start flex-end center |
flex-start |
justify-content | 配合 display: flex; 水平轴对齐方式: flex-start flex-end center |
flex-start |
align-items | 配合 display: flex; 垂直轴对齐方式: flex-start flex-end center |
flex-start |
border-radius | 圆角边框,支持% 、rpx 、px |
- |
box-sizing | 可选值:border-box |
- |
box-shadow | 投影 | - |
background(color) | 支持渐变,但必须写百分比!如:linear-gradient(,#ff971b 0%, #ff5000 100%) 、radial-gradient(#0ff 15%, #f0f 60%) ,目前 radial-gradient 渐变的圆心为元素中点,半径为最长边,不支持设置 |
- |
background-clip | 文字渐变,配合background 背景渐变,设置background-clip: text 达到文字渐变效果 |
- |
background-image | view 元素背景:url(src) ,若只是设置背景图,请不要设置background-repeat |
- |
background-repeat | 设置是否及如何重复背景纹理,可选值:repeat 、repeat-x 、repeat-y 、no-repeat |
repeat |
object-fit | 图片元素适应容器方式,类似于mode ,可选值:cover 、 contain 、 fill 、 none |
- |
object-position | 图片的对齐方式,配合object-fit 使用 |
- |
名称 | 含义 |
---|---|
contain | 保持宽高缩放图片,使图片的长边能完全显示出来 |
cover | 保持宽高缩放图片,使图片的短边能完全显示出来,裁剪长边 |
fill | 拉伸图片,使图片填满元素 |
none | 保持图片原有尺寸 |
事件名 | 说明 | 返回值 |
---|---|---|
success | 生成图片成功,若使用is-canvas-to-temp-filePath 可以接收图片地址 |
path |
fail | 生成图片失败 | error |
done | 绘制成功 | |
progress | 绘制进度 | number |
事件名 | 说明 | 返回值 |
---|---|---|
render(object) | 渲染器,传入JSON 绘制海报 | promise |
canvasToTempFilePath(object) | 把当前画布指定区域的内容导出生成指定大小的图片,并返回文件临时路径。 | |
canvasToTempFilePathSync(object) | 同步接口,同上 |
<IMG/>
v-if
,v-show
、display:none
、opacity:0
,另外也不要把画板放在弹窗里。如果需要隐藏画板请设置 custom-style="position: fixed; left: 200%"
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