真机canvasToTempFilePath:fail :create bitmap failed?
基础库信息看图，代码片段：https://developers.weixin.qq.com/s/qVtsctm97BVq，记得开启不校验域名
[图片] const drawImageByUrl = (imgData, slef) => {
return new Promise((rolve) => {
ctx = wx.createCanvasContext('myCanvas', slef);
console.log(ctx, 'ctx');
// ctx = Canvas.getContext('2d');
// 开始绘制
const colorList = ['#229241', '#e64032', '#d7aa1c', '#3c8af0', '#f46502', '#99cc75', '#001b30', '#bc1616'];
wx.getImageInfo({
src: imgData.img,
success: (res) => {
const imgWidth = res.width; // 图片原始宽度
const imgHeight = res.height; // 图片原始高度
console.log(res, '图片宽高resres');
// 绘制图片
ctx.drawImage(res.path, 0, 0, imgWidth, imgHeight);
if (imgData.locate && imgData.locate.length > 0) {
imgData.locate.map((item, idx) => {
const color = colorList[idx];
if (item.box && item.box.length > 0) {
let x1 = item.box[0],
y1 = item.box[1],
x2 = item.box[2],
y2 = item.box[3];
// x1, y1, x2, (y2 = ((x1 / 1000) * w, (y1 / 1000) * h, (x2 / 1000) * w, (y2 / 1000) * h));
x1 = (x1 / 1000) * imgWidth;
y1 = (y1 / 1000) * imgHeight;
x2 = (x2 / 1000) * imgWidth;
y2 = (y2 / 1000) * imgHeight;
const width = x2 - x1,
height = y2 - y1;
// 画矩形
drawRectangle(x1, y1, width, height, color);
// 标注
if (item.ref) drawText(item.ref, x1, y1, color);
}
});
// setTimeout(() => {
// const imgresult = ctx.toDataURL('image/png');
// return {
// url: imgresult
// }
// }, 500);
}
//输出图片
ctx.draw(false,()=>{
setTimeout(()=>{
wx.canvasToTempFilePath({
canvasId: 'myCanvas',
// canvas: ctx, //画布标识，传入 canvas 组件实例 （canvas type="2d" 时使用该属性）。
width: imgWidth, //指定的画布区域的宽度
height: imgHeight, //指定的画布区域的高度
destWidth: imgWidth, //输出的图片的宽度
destHeight: imgHeight, //输出的图片的高度
success: (result) => {
var tempFilePath = result.tempFilePath;
rolve(tempFilePath)
},
fail: function (error) {
console.log(error);
}
}, slef);
},500)
})
},
fail: function (err) {
console.error('Failed to get image info:', err);
}
});
})
}
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