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components/tpx-bluetooth-print/tpx-bluetooth-print.vue

@@ -40,7 +40,7 @@
 		</view>
 	</tpx-dialog>
 	
-	<view v-for="(url, index) in imageUrl">
+	<view v-for="(url, index) in canvImages">
 		<create-image-data-bycanvas :ref="`curCanvas${index}`"></create-image-data-bycanvas>
 	</view>
 	
@@ -57,6 +57,10 @@ export default {
 		
 	},
 	computed: {
+		// ！！！注意 canvas预览图 必须用不同变量，否则获取不到imgdata
+		canvImages(){
+			return [...this.imageUrl]
+		}
 	},
 	components: {
 		RenderTemplate, RenderTemplate, CreateImageDataBycanvas
@@ -106,7 +110,7 @@ export default {
 		async confirmPrint(){
 			this.imageUrl.map(async (url, index)=> {
 				// ！！！注意：必须修改。 canvas渲染的图必须修改url，否则渲染不出来
-				url = `${url}?t=${new Date().valueOf()}` 
+				url = `${url}?t=${new Date().valueOf()}`
 				let imgRes = await this.$refs[`curCanvas${index}`][0].renderCanvasImg(url, this.paperWidth)
 				let res = await this.$refs.curPrint.callPrint({
 					imgRes,