283 lines
7.5 KiB
Vue
283 lines
7.5 KiB
Vue
<template>
|
||
<view style="background: #FFFFFF;">
|
||
<canvas v-if="!tempFilePath" :canvas-id="CanvasID"
|
||
:style="{ width: canvasW + 'px', height: canvasH + 'px' }"></canvas>
|
||
<image v-else lazy-load :src="tempFilePath" mode="widthFix" class="is-response"
|
||
@longpress="toSave(tempFilePath)"></image>
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
var _this;
|
||
export default {
|
||
name: 'wm-poster',
|
||
props: {
|
||
CanvasID: {
|
||
//CanvasID 等同于 canvas-id
|
||
Type: String,
|
||
default: 'PosterCanvas'
|
||
},
|
||
imgSrc: {
|
||
//展示图
|
||
Type: String,
|
||
default: ''
|
||
},
|
||
QrSrc: {
|
||
//二维码
|
||
Type: String,
|
||
default: ''
|
||
},
|
||
Title: {
|
||
//文本内容
|
||
Type: String,
|
||
default: '短剧'
|
||
},
|
||
TitleColor: {
|
||
//标题颜色
|
||
Type: String,
|
||
default: '#333333'
|
||
},
|
||
LineType: {
|
||
//标题显示行数 大于两行是否省略 （注超出2行显示会导致画布布局絮乱）
|
||
Type: [String, Boolean],
|
||
default: true
|
||
},
|
||
PriceTxt: {
|
||
//价格值
|
||
Type: String,
|
||
default: ''
|
||
},
|
||
PriceColor: {
|
||
//价格颜色
|
||
Type: String,
|
||
default: '#e31d1a'
|
||
},
|
||
OriginalTxt: {
|
||
//原价值
|
||
Type: String,
|
||
default: ''
|
||
},
|
||
OriginalColor: {
|
||
//默认颜色（如原价与扫描二维码颜色）
|
||
Type: String,
|
||
default: '#b8b8b8'
|
||
},
|
||
Width: {
|
||
//画布宽度 (高度根据图片比例计算 单位upx)
|
||
Type: String,
|
||
default: 750
|
||
},
|
||
CanvasBg: {
|
||
//canvas画布背景色
|
||
Type: String,
|
||
default: '#ffffff'
|
||
},
|
||
Referrer: {
|
||
//推荐人信息
|
||
Type: String,
|
||
default: '精选好剧'
|
||
},
|
||
ViewDetails: {
|
||
//描述提示文字
|
||
Type: String,
|
||
default: '长按或扫描识别二维码观看'
|
||
}
|
||
},
|
||
data() {
|
||
return {
|
||
tempFilePath: '',
|
||
canvasW: 0,
|
||
canvasH: 0,
|
||
canvasImgSrc: '',
|
||
ctx: null
|
||
};
|
||
},
|
||
methods: {
|
||
toSave(url) {
|
||
|
||
//#ifndef H5
|
||
uni.getImageInfo({
|
||
src: url,
|
||
success: function(image) {
|
||
console.log('图片信息：', JSON.stringify(image));
|
||
uni.saveImageToPhotosAlbum({
|
||
filePath: image.path,
|
||
success: function() {
|
||
console.log('save success');
|
||
uni.showToast({
|
||
title: '海报已保存相册',
|
||
icon: 'success',
|
||
duration: 2000
|
||
});
|
||
}
|
||
});
|
||
}
|
||
});
|
||
//#endif
|
||
},
|
||
async OnCanvas() {
|
||
uni.showLoading({
|
||
title: '海报生成中...'
|
||
})
|
||
_this.ctx = uni.createCanvasContext(_this.CanvasID, this);
|
||
const C_W = uni.upx2px(_this.Width), //canvas宽度
|
||
C_P = uni.upx2px(30), //canvas Paddng 间距
|
||
C_Q = uni.upx2px(150); //二维码或太阳码宽高
|
||
let _strlineW = 0; //文本宽度
|
||
let _imgInfo = await _this.getImageInfo({
|
||
imgSrc: _this.imgSrc
|
||
}); //广告图
|
||
console.log('图片信息0：', JSON.stringify(""));
|
||
|
||
let _QrCode = await _this.getImageInfo({
|
||
imgSrc: _this.QrSrc
|
||
}); //二维码或太阳码
|
||
|
||
console.log('图片信息1：', JSON.stringify(""));
|
||
|
||
let r = [_imgInfo.width, _imgInfo.height];
|
||
let q = [_QrCode.width, _QrCode.height];
|
||
let imgW = C_W - C_P * 2;
|
||
if (r[0] != imgW) {
|
||
r[1] = Math.floor((imgW / r[0]) * r[1]);
|
||
r[0] = imgW;
|
||
}
|
||
if (q[0] != C_Q) {
|
||
q[1] = Math.floor((C_Q / q[0]) * q[1]);
|
||
q[0] = C_Q;
|
||
}
|
||
_this.canvasW = C_W;
|
||
_this.canvasH = r[1] + q[1] + 40;
|
||
_this.ctx.setFillStyle(_this.CanvasBg); //canvas背景颜色
|
||
_this.ctx.fillRect(0, 0, C_W, _this.canvasH); //canvas画布大小
|
||
|
||
//添加图片展示
|
||
_this.ctx.drawImage(_imgInfo.path, C_P, C_P, r[0], r[1]);
|
||
//添加图片展示 end
|
||
|
||
//设置文本
|
||
_this.ctx.setFontSize(uni.upx2px(32)); //设置标题字体大小
|
||
_this.ctx.setFillStyle(_this.TitleColor); //设置标题文本颜色
|
||
let _strLastIndex = 0; //每次开始截取的字符串的索引
|
||
let _strHeight = r[1] + C_P * 2 + 10; //绘制字体距离canvas顶部的初始高度
|
||
let _num = 1;
|
||
// for (let i = 0; i < _this.Title.length; i++) {
|
||
// _strlineW += _this.ctx.measureText(_this.Title[i]).width;
|
||
// if (_strlineW > r[0]) {
|
||
// if (_num == 2 && _this.LineType) {
|
||
// //文字换行数量大于二进行省略号处理
|
||
// _this.ctx.fillText(_this.Title.substring(_strLastIndex, i - 8) + '...', C_P, _strHeight);
|
||
// _strlineW = 0;
|
||
// _strLastIndex = i;
|
||
// _num++;
|
||
// break;
|
||
// } else {
|
||
// _this.ctx.fillText(_this.Title.substring(_strLastIndex, i), C_P, _strHeight);
|
||
// _strlineW = 0;
|
||
// _strHeight += 20;
|
||
// _strLastIndex = i;
|
||
// _num++;
|
||
// }
|
||
// } else if (i == _this.Title.length - 1) {
|
||
// _this.ctx.fillText(_this.Title.substring(_strLastIndex, i + 1), C_P, _strHeight);
|
||
// _strlineW = 0;
|
||
// }
|
||
// }
|
||
//设置文本 end
|
||
//设置价格
|
||
_strlineW = C_P;
|
||
_strHeight += uni.upx2px(60);
|
||
if (_num == 1) {
|
||
_strHeight += 20; //单行标题时占位符
|
||
}
|
||
// if (_this.PriceTxt != '') {
|
||
// //判断是否有销售价格
|
||
// _this.ctx.setFillStyle(_this.PriceColor);
|
||
// _this.ctx.setFontSize(uni.upx2px(38));
|
||
// // _this.ctx.fillText('券后价 ￥' + _this.PriceTxt, _strlineW, _strHeight); //商品价格
|
||
// _strlineW += _this.ctx.measureText('券后价 ￥' + _this.PriceTxt).width + uni.upx2px(10);
|
||
// }
|
||
// // #ifdef H5
|
||
// if (_this.PriceTxt != '' && _this.OriginalTxt != '') {
|
||
// //判断是否有销售价格且原价
|
||
// _this.ctx.setFillStyle(_this.OriginalColor);
|
||
// _this.ctx.setFontSize(uni.upx2px(24));
|
||
// _this.ctx.fillText(_this.OriginalTxt, _strlineW, _strHeight); //商品原价
|
||
// }
|
||
// #endif
|
||
_this.ctx.strokeStyle = _this.OriginalColor;
|
||
_this.ctx.moveTo(_strlineW, _strHeight - uni.upx2px(10)); //起点
|
||
_this.ctx.lineTo(_strlineW + _this.ctx.measureText(_this.OriginalTxt).width, _strHeight - uni.upx2px(
|
||
10)); //终点
|
||
_this.ctx.stroke();
|
||
//设置价格 end
|
||
|
||
//添加二维码
|
||
_strHeight += uni.upx2px(20);
|
||
let toTop = uni.upx2px(20);
|
||
// _this.ctx.drawImage(_QrCode.path, r[0] - q[0] + C_P, _strHeight, q[0], q[1]);
|
||
_this.ctx.drawImage(_QrCode.path, r[0] - q[0] + C_P, _this.canvasH - q[1] - toTop, q[0], q[1]);
|
||
//添加二维码 end
|
||
|
||
//添加推荐人与描述
|
||
_this.ctx.setFillStyle(_this.TitleColor);
|
||
_this.ctx.setFontSize(uni.upx2px(30));
|
||
_this.ctx.fillText(_this.Title, C_P, _this.canvasH - q[1] - toTop + q[1] / 2);
|
||
_this.ctx.setFillStyle(_this.OriginalColor);
|
||
_this.ctx.setFontSize(uni.upx2px(24));
|
||
_this.ctx.fillText(_this.ViewDetails, C_P, _this.canvasH - q[1] - toTop + q[1] / 2 + 20);
|
||
//添加推荐人与描述 end
|
||
//延迟后渲染至canvas上
|
||
setTimeout(function() {
|
||
_this.ctx.draw(true, ret => {
|
||
_this.getNewImage();
|
||
});
|
||
}, 600);
|
||
},
|
||
async getImageInfo({
|
||
imgSrc
|
||
}) {
|
||
return new Promise((resolve, errs) => {
|
||
uni.getImageInfo({
|
||
src: imgSrc,
|
||
success: function(image) {
|
||
resolve(image);
|
||
},
|
||
fail(err) {
|
||
// errs(err);
|
||
_this.$emit('error', err);
|
||
|
||
|
||
}
|
||
});
|
||
});
|
||
},
|
||
getNewImage() {
|
||
uni.canvasToTempFilePath({
|
||
canvasId: _this.CanvasID,
|
||
quality: 1,
|
||
complete: res => {
|
||
_this.tempFilePath = res.tempFilePath;
|
||
_this.$emit('success', res);
|
||
|
||
// uni.showToast({
|
||
// title: '长按图片保存海报',
|
||
// mask: false,
|
||
// duration: 2000,
|
||
// icon: "none"
|
||
// });
|
||
|
||
}
|
||
},
|
||
this
|
||
);
|
||
}
|
||
},
|
||
mounted() {
|
||
_this = this;
|
||
this.OnCanvas();
|
||
}
|
||
};
|
||
</script>
|
||
|
||
<style></style> |