uniapp开发微信小程序纯代码生成海报

				<view class="JuanBu_HaiBao_btn1" @click="savePoster">保存到相册</view>
savePoster() {
			    // 创建canvas对象
			    const ctx = uni.createCanvasContext('posterCanvas', this);
			
			    // 绘制背景
			    ctx.setFillStyle('#000');
			    ctx.fillRect(0, 0, 660, 1050);
			
			    // 绘制图片
			    ctx.drawImage('../../static/index/juanbusrc.png', 0, 0, 660, 1050);
			
			    // 绘制文字
			    ctx.setFontSize(32);
			    ctx.setFillStyle('#FFF');
			    ctx.setTextAlign('center');
			    ctx.fillText(this.HuoListname, 330, 310);
			
			    // ... 绘制其他内容
			
			    // 绘制二维码
			    ctx.drawImage(this.YM + this.ewm, 155, 680, 220, 220);
			
			    // 绘制完成后执行生成临时图片路径和保存到相册
			    ctx.draw(false, () => {
			      uni.canvasToTempFilePath({
			        canvasId: 'posterCanvas',
			        success: (res) => {
			          uni.saveImageToPhotosAlbum({
			            filePath: res.tempFilePath,
			            success: () => {
			              uni.showToast({
			                title: '保存成功',
			                icon: 'success'
			              });
			            },
			            fail: () => {
			              uni.showToast({
			                title: '保存失败',
			                icon: 'none'
			              });
			            }
			          });
			        }
			      });
			    });
			  },