解决订阅消息有时候会永远pending的问题

utils/BleHelper.js

@@ -111,7 +111,7 @@ class BleHelper {
 			for (var i = 0; i < this.data.LinkedList.length; i++) {
 				let device = this.data.LinkedList[i];
 				// console.log("自动连接绑定过的设备:" + device.deviceId);
-				if(device.macAddress && device.device && device.device.id){
+				if (device.macAddress && device.device && device.device.id) {
 					this.LinkBlue(device.deviceId, device.writeServiceId, device.wirteCharactId, device
 						.notifyCharactId);
 				}
@@ -468,14 +468,17 @@ class BleHelper {
 									this.data.LinkedList.find((v) => {
 										if (v.deviceId == receive
 											.deviceId) {
-											str= str.replace(
+											str = str.replace(
 												header, "");
-												if(str.includes(':')){
+											if (str.includes(':')) {
-													v.macAddress =str;
+												v.macAddress = str;
-												}else{
+											} else {
-													v.macAddress=str.replace(/(.{2})/g, '$1:').slice(0, -1)
+												v.macAddress = str.replace(
+														/(.{2})/g, '$1:')
+													.slice(0, -1)
 											}
-											console.log("收到mac地址:", v.macAddress)
+											console.log("收到mac地址:", v
+												.macAddress)
 										}
 									});
 									uni.setStorageSync(this.StorageKey, this.data
@@ -512,27 +515,29 @@ class BleHelper {
 								hexs: hexs
 							};
 							console.log("监听到特征值:" + JSON.stringify(recData));
-							try{
+							try {
 								if (this.cfg.receivDataCallback) {
 
 									if (this.cfg.receivDataCallback.length > 0) {
 										console.log("有人订阅消息")
 										let path = this.getCurrentPagePath();
 
-										this.cfg.receivDataCallback.forEach((rec) => {
+										this.cfg.receivDataCallback.forEach((
+										rec) => {
 
 											if (rec.callback) {
-												rec.callback(recData, f, path);
+												rec.callback(recData, f,
+													path);
 											}
 										})
-									}else{
+									} else {
 										console.log("无人订阅消息");
 									}
 								} else {
 									console.log("无人订阅receivDataCallback,不处理数据");
 								}
-							}catch(ex){
+							} catch (ex) {
-								console.log("ex=",ex);
+								console.log("ex=", ex);
 							}
 
 						});
@@ -687,9 +692,10 @@ class BleHelper {
 				}
 				// console.log("c=", c);
 				let startSubScribe = (id, serviceId, characteristicId) => {
-					console.log("serviceId=",serviceId);
+					console.log("serviceId=", serviceId);
-					console.log("characteristicId=",characteristicId);
+					console.log("characteristicId=", characteristicId);
-					return new Promise((succ, err) => {
+					let p1= new Promise((succ, err) => {
+						
 						uni.notifyBLECharacteristicValueChange({
 							deviceId: id,
 							serviceId: serviceId,
@@ -707,7 +713,8 @@ class BleHelper {
 										v.notifyState = state;
 									}
 								});
-								succ();
+								console.log("success SubScribe");
+								succ(res);//见了鬼了，有时候执行了succ但promise永远pending了
 							},
 							fail: (ex) => {
 
@@ -715,9 +722,25 @@ class BleHelper {
 							}
 						});
 					});
+					
+					let p2=new Promise((succ,err)=>{
+						setTimeout(()=>{
+							err({code:-1});
+						},50);
+					});
+					return new Promise((succ,err)=>{
+						Promise.race([p1,p2]).then(succ).catch(ex=>{
+							if(ex.code==-1){
+								succ();
+								return;
+							}
+							err(ex);
+						})
+					});
+					
 				}
 				let promies = new Array();
-				if(c.Characteristics && c.Characteristics.length){
+				if (c.Characteristics && c.Characteristics.length) {
 					for (var i = 0; i < c.Characteristics.length; i++) {
 						let item = c.Characteristics[i];
 						let serviceId = item.serviceId;
@@ -730,8 +753,10 @@ class BleHelper {
 				}
 
 				if (promies.length > 0) {
-					Promise.allSettled(promies).then((results) => {
 
+					console.log("234324324324");
+					Promise.allSettled(promies).then((results) => {
+						console.log("11111");
 						results.forEach((result, index) => {
 							if (result.status === "fulfilled") {
 								console.log(`操作${index + 1}成功:`, result.value);
@@ -743,9 +768,13 @@ class BleHelper {
 
 						resolve();
 					}).catch((ex) => {
+						console.log("222222");
 						reject(ex);
+					}).finally(()=>{
+						console.log("finally")
 					});
 				} else {
+					console.log("33333");
 					resolve();
 				}
 
@@ -971,7 +1000,9 @@ class BleHelper {
 					}
 
 					if (!this.data.available) {
-		        reject(this.getError({ code: 10001 }));
+						reject(this.getError({
+							code: 10001
+						}));
 						return;
 					}
 
@@ -996,8 +1027,10 @@ class BleHelper {
 									this.data.LinkedList.push(cr);
 								}
 
-		            uni.setStorageSync(this.StorageKey, this.data.LinkedList);
+								uni.setStorageSync(this.StorageKey, this.data
-		            console.log("LinkedList=", this.data.LinkedList);
+									.LinkedList);
+								console.log("LinkedList=", this.data
+								.LinkedList);
 
 								// 处理 MTU 设置
 								if (plus.os.name === 'Android') {
@@ -1005,12 +1038,14 @@ class BleHelper {
 										deviceId: deviceId,
 										mtu: 512,
 										success: (mtu) => {
-		                  console.log("mtu设置成功", mtu);
+											console.log("mtu设置成功",
+												mtu);
 											resolve(true);
 										},
 										fail: () => {
 											console.log("mtu设置失败");
-		                  resolve(true); // MTU设置失败不影响连接成功
+											resolve(
+											true); // MTU设置失败不影响连接成功
 										}
 									});
 								} else {
@@ -1059,15 +1094,15 @@ class BleHelper {
 						return this.getService(deviceId, targetServiceId, writeCharId,
 							notifyCharId); //获取服务	
 					} else {
-						if(f.wirteCharactId && f.notifyCharactId){
+						if (f.wirteCharactId && f.notifyCharactId) {
 							if (!f.notifyState) {
 								console.log("开始订阅特征");
 								this.subScribe(deviceId, true);
-							}else{
+							} else {
 								console.log("不订阅消息");
 							}
 							return Promise.resolve(true);
-						}else{
+						} else {
 							console.log("开始获取服务", targetServiceId)
 							return this.getService(deviceId, targetServiceId, writeCharId,
 								notifyCharId);
@@ -1085,13 +1120,13 @@ class BleHelper {
 				}
 
 			}).then(() => {
-
+				console.log("then.....");
 
 				setTimeout(() => {
 					resolve();
 				}, 500);
 			}).catch((ex) => {
-				////console.log("出现异常", ex);
+				console.log("出现异常", ex);
 				reject(ex);
 			});
 		});