[描述]：适配iOS14本地网络权限

EchoSDK.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'EchoSDK'
-  s.version          = '0.0.4'
+  s.version          = '0.0.5'
   s.summary          = 'Echo调试工具SDK.'
 
 # This description is used to generate tags and improve search results.

README.md

@@ -103,7 +103,22 @@
 pod 'EchoSDK', :configurations => ["Debug"]
 ```
 
-2、在App启动时添加以下代码
+2、由于iOS14系统本地网络权限限制，需在工程的Info.plist文件中添加NSLocalNetworkUsageDescription和NSBonjourServices配置。在Xcode中选中Info.plist文件，右键选择Open As Source Code，并添加如下内容：
+
+```
+<key>NSLocalNetworkUsageDescription</key>
+<string></string>
+<key>NSBonjourServices</key>
+<array>
+	<string>_ECHO._tcp</string>
+</array>
+```
+
+在Xcode中显示效果如下图：
+
+![img](https://github.com/didi/echo/raw/master/Images/ios14permission.jpg)
+
+3、在App启动时添加以下代码
 
 ```
 #ifdef DEBUG
@@ -117,10 +132,29 @@ pod 'EchoSDK', :configurations => ["Debug"]
 }
 ```
 
-3、启动Echo的Mac端
+4、启动Echo的Mac端
 
 手动build工程的话，可以在/Mac目录下执行`pod install`之后，启动`Echo.xcworkspace`并运行。
 
+## iOS14 适配
+
+iOS14系统对本地网络权限进行了更严格的限制，鉴于Echo底层用到了Bonjour服务，在Xcode12之后需要在工程的Info.plist文件中添加NSLocalNetworkUsageDescription和NSBonjourServices配置。在Xcode中选中Info.plist文件，右键选择Open As Source Code，并添加如下内容：
+
+```
+<key>NSLocalNetworkUsageDescription</key>
+<string></string>
+<key>NSBonjourServices</key>
+<array>
+	<string>_ECHO._tcp</string>
+</array>
+```
+
+添加之后在Xcode中显示效果如下图：
+
+![img](https://github.com/didi/echo/raw/master/Images/ios14permission.jpg)
+
+> 注：即使不进行上述适配，Echo的自动连接功能仍会生效：你可以通过USB连接真机或者直接在同一台电脑上运行模拟器来实现自动连接。
+
 ## 感谢
 
 在开发过程中，`Echo`使用和参考了以下优秀项目的部分代码

Sources/Core/Channel/Bonjour/ECONetServiceBrowser.m

@@ -75,6 +75,25 @@ - (void)netServiceBrowser:(NSNetServiceBrowser *)browser didRemoveService:(NSNet
 - (void)netServiceBrowser:(NSNetServiceBrowser *)browser didNotSearch:(NSDictionary<NSString *, NSNumber *> *)errorDict {
     NSLog(@"%s",__func__);
     //重试
+    if (@available(iOS 14.0, *)) {
+        NSNetServicesError errorCode = [errorDict[@"NSNetServicesErrorCode"] integerValue];
+        if (errorCode == NSNetServicesMissingRequiredConfigurationError) {
+            //iOS14新增本地网络隐私权限，提示用户如何设置并忽略
+            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(3.f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+                NSString *title = @"Echo 连接提示";
+                NSString *message = @"由于iOS14本地网络权限限制，请在Info.plist中设置NSLocalNetworkUsageDescription和NSBonjourServices，详细内容见：https://github.com/didi/echo";
+                UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
+                UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
+
+                }];
+                [alertController addAction:confirmAction];
+                UIViewController *rootVC = [UIApplication sharedApplication].keyWindow.rootViewController;
+                [rootVC presentViewController:alertController animated:YES completion:nil];
+            });
+            NSLog(@">>Echo Warning：Bonjour服务错误，由于iOS14本地网络权限限制，请在Info.plist中设置NSLocalNetworkUsageDescription和NSBonjourServices，详细内容见：https://github.com/didi/echo");
+            return;
+        }
+    }
     [self resetBrowserService];
 }
 #pragma mark - NSNetServiceDelegate methods

iOS/Example/EchoDemo/EchoDemo-Info.plist

@@ -28,6 +28,12 @@
 	<string>1.0</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSBonjourServices</key>
+	<array>
+		<string>_ECHO._tcp</string>
+	</array>
+	<key>NSLocalNetworkUsageDescription</key>
+	<string></string>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>