uu

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

@@ -133,13 +133,13 @@ export default {
 					this.canvasWidth = w
 					this.canvasHeight = h
 					// 在canvas 画一张图片
-					// ctx.fillStyle = 'rgba(255,255,255,1)';
-					ctx.clearRect(0, 0, w, h);
-					ctx.fillRect(0, 0, w, h);
-					
 					let imgRect = canvasUtil.containImg(0, 0, w, h, res.width, res.height)
+					let ctData = [imgRect.dx, imgRect.dy, imgRect.dWidth, imgRect.dHeight]
+					ctx.fillStyle = 'rgba(255,255,255,1)';
+					ctx.clearRect(...ctData);
+					ctx.fillRect(...ctData);
 					// 把原图缩放到 打印宽度的比例 绘制
-					ctx.drawImage(filePath, imgRect.dx, imgRect.dy, imgRect.dWidth, imgRect.dHeight); 
+					ctx.drawImage(filePath, ...ctData); 
 					
 					ctx.draw(false, () => {
 						setTimeout( async ()=> {

components/tpx-bluetooth/tpx-bluetooth.vue

@@ -155,6 +155,7 @@ export default {
 	},
 	unmounted() {
 		this.stopDiscoveryPrinter()
+		this.closeBluetoothAdapter()
 	},
 	methods: {
 		changeTab(type) {
@@ -202,7 +203,12 @@ export default {
 		// 停止搜寻附近的蓝牙外围设备
 		async stopDiscoveryPrinter () {
 			this.searchLoading = false
-			uni.stopBluetoothDevicesDiscovery()
+			uni?.stopBluetoothDevicesDiscovery?.()
+		},
+		// 断开蓝牙
+		async closeBluetoothAdapter () {
+			this.searchLoading = false
+			uni?.closeBluetoothAdapter?.()
 		},
 		async handleSelectDeviceId (item) {
 			this.deviceId = item.deviceId