diff --git a/README.md b/README.md
index a78174d..2d646f0 100644
--- a/README.md
+++ b/README.md
@@ -107,4 +107,12 @@ qDebug() << zcs->txt["Qt"];
 
 Qt5
 
-On Linux, libavahi-client-dev and libavahi-common-dev
\ No newline at end of file
+On Linux, libavahi-client-dev and libavahi-common-dev
+
+### Apple App Store deployment
+
+Publishing GPL software in the App Store is a [violation of the GPL](https://news.ycombinator.com/item?id=3488833).  If you need to publish an app in the Apple App Store that uses QZeroConf, please contact me for a copy of QZeroConf with a BSD licence.
+
+### iOS device sleep
+
+When iOS puts the device to sleep, it breaks the DNS-SD browser and service publisher.  The only way around this is to call stopServicePublish() and stopBrowser() when the application state changes to Qt::ApplicationSuspended (sleep) and then call startPublish() and startBrowser() when the application state changes to Qt::ApplicationActive (wake).  See appStateChanged() in example.
diff --git a/avahiclient.cpp b/avahiclient.cpp
index 55ce737..9b4e45c 100644
--- a/avahiclient.cpp
+++ b/avahiclient.cpp
@@ -208,8 +208,10 @@ public:
 		browser = NULL;
 
 		QMap<QString, QZeroConfService *>::iterator i;
-		for (i = pub->services.begin(); i != pub->services.end(); i++)
+		for (i = pub->services.begin(); i != pub->services.end(); i++) {
+			emit pub->serviceRemoved(*i);
 			delete *i;
+		}
 		pub->services.clear();
 
 		QMap<QString, AvahiServiceResolver *>::iterator r;
@@ -269,6 +271,14 @@ void QZeroConf::stopServicePublish(void)
 	}
 }
 
+bool QZeroConf::publishExists(void)
+{
+	if (pri->group)
+		return true;
+	else
+		return false;
+}
+
 // http://www.zeroconf.org/rendezvous/txtrecords.html
 
 void QZeroConf::addServiceTxtRecord(QString nameOnly)
@@ -312,3 +322,11 @@ void QZeroConf::stopBrowser(void)
 {
 	pri->broswerCleanUp();
 }
+
+bool QZeroConf::browserExists(void)
+{
+	if (pri->browser)
+		return true;
+	else
+		return false;
+}
diff --git a/avahicore.cpp b/avahicore.cpp
index 04b7a91..091514b 100644
--- a/avahicore.cpp
+++ b/avahicore.cpp
@@ -220,8 +220,10 @@ public:
 		browser = NULL;
 
 		QMap<QString, QZeroConfService *>::iterator i;
-		for (i = pub->services.begin(); i != pub->services.end(); i++)
+		for (i = pub->services.begin(); i != pub->services.end(); i++) {
+			emit pub->serviceRemoved(*i);
 			delete *i;
+		}
 		pub->services.clear();
 
 		QMap<QString, AvahiSServiceResolver *>::iterator r;
@@ -309,6 +311,14 @@ void QZeroConf::stopServicePublish(void)
 	}
 }
 
+bool QZeroConf::publishExists(void)
+{
+	if (pri->group)
+		return true;
+	else
+		return false;
+}
+
 // http://www.zeroconf.org/rendezvous/txtrecords.html
 
 void QZeroConf::addServiceTxtRecord(QString nameOnly)
@@ -352,3 +362,11 @@ void QZeroConf::stopBrowser(void)
 {
 	pri->broswerCleanUp();
 }
+
+bool QZeroConf::browserExists(void)
+{
+	if (pri->browser)
+		return true;
+	else
+		return false;
+}
diff --git a/bonjour.cpp b/bonjour.cpp
index 05d2b07..8dc4dd3 100644
--- a/bonjour.cpp
+++ b/bonjour.cpp
@@ -250,8 +250,10 @@ void QZeroConfPrivate::cleanUp(DNSServiceRef toClean)
 			browserSocket = NULL;
 		}
 		QMap<QString, QZeroConfService *>::iterator i;
-		for (i = pub->services.begin(); i != pub->services.end(); i++)
+		for (i = pub->services.begin(); i != pub->services.end(); i++) {
+			emit pub->serviceRemoved(*i);
 			delete *i;
+		}
 		pub->services.clear();
 	}
 	else if (toClean == dnssRef) {
@@ -318,6 +320,14 @@ void QZeroConf::stopServicePublish(void)
 	pri->cleanUp(pri->dnssRef);
 }
 
+bool QZeroConf::publishExists(void)
+{
+	if (pri->dnssRef)
+		return true;
+	else
+		return false;
+}
+
 void QZeroConf::addServiceTxtRecord(QString nameOnly)
 {
 	pri->txt.append((quint8) nameOnly.size());
@@ -374,3 +384,11 @@ void QZeroConf::stopBrowser(void)
 {
 	pri->cleanUp(pri->browser);
 }
+
+bool QZeroConf::browserExists(void)
+{
+	if (pri->browser)
+		return true;
+	else
+		return false;
+}
diff --git a/example/window.cpp b/example/window.cpp
index f58e85f..757f4a9 100644
--- a/example/window.cpp
+++ b/example/window.cpp
@@ -24,6 +24,7 @@
    Example app to demonstrate service publishing and service discovery
 ---------------------------------------------------------------------------------------------------
 **************************************************************************************************/
+#include <QGuiApplication>
 #include <QVBoxLayout>
 #include <QPushButton>
 #include <QTableWidgetItem>
@@ -54,9 +55,9 @@ mainWindow::mainWindow()
 
 	connect(&zeroConf, SIGNAL(serviceAdded(QZeroConfService *)), this, SLOT(addService(QZeroConfService *)));
 	connect(&zeroConf, SIGNAL(serviceRemoved(QZeroConfService *)), this, SLOT(removeService(QZeroConfService *)));
+	connect(qGuiApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)), this, SLOT(appStateChanged(Qt::ApplicationState)));
 
-	zeroConf.startBrowser("_qtzeroconf_test._tcp");
-	startPublish();
+	publishEnabled = 1;
 }
 
 void mainWindow::buildGUI()
@@ -68,13 +69,13 @@ void mainWindow::buildGUI()
 	button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 	layout->addWidget(button);
 	layout->setAlignment(button, Qt::AlignHCenter);
-	connect(button, SIGNAL(clicked()), this, SLOT(startPublish()));
+	connect(button, &QPushButton::clicked, this, &mainWindow::startPublishClicked);
 
 	button = new QPushButton(tr(" Disable Publish "));
 	button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 	layout->addWidget(button);
 	layout->setAlignment(button, Qt::AlignHCenter);
-	connect(button, SIGNAL(clicked()), this, SLOT(stopPublish()));
+	connect(button, &QPushButton::clicked, this, &mainWindow::stopPublishClicked);
 
 	table.verticalHeader()->hide();
 	table.horizontalHeader()->hide();
@@ -102,21 +103,39 @@ QString mainWindow::buildName(void)
     return name;
 }
 
+void mainWindow::appStateChanged(Qt::ApplicationState state)
+{
+	if (state == Qt::ApplicationSuspended) {
+		zeroConf.stopServicePublish();
+		zeroConf.stopBrowser();
+	}
+	else if (state == Qt::ApplicationActive) {
+		if (publishEnabled && !zeroConf.publishExists())
+			startPublish();
+		if (!zeroConf.browserExists())
+			zeroConf.startBrowser("_qtzeroconf_test._tcp");
+	}
+}
+
 // ---------- Service Publish ----------
 
 void mainWindow::startPublish()
 {
-	if (publishEnabled)
-		return;
-	publishEnabled = 1;
-
 	zeroConf.clearServiceTxtRecords();
 	zeroConf.addServiceTxtRecord("Qt", "the best!");
 	zeroConf.addServiceTxtRecord("ZeroConf is nice too");
 	zeroConf.startServicePublish(buildName().toUtf8(), "_qtzeroconf_test._tcp", "local", 11437);
 }
 
-void mainWindow::stopPublish()
+void mainWindow::startPublishClicked()
+{
+	if (publishEnabled)
+		return;
+	publishEnabled = 1;
+	startPublish();
+}
+
+void mainWindow::stopPublishClicked()
 {
 	if (!publishEnabled)
 		return;
diff --git a/example/window.h b/example/window.h
index b259b50..b4a53f1 100644
--- a/example/window.h
+++ b/example/window.h
@@ -40,14 +40,16 @@ public:
 
 private:
 	void buildGUI();
+	void startPublish();
 	QString buildName(void);
 	QTableWidget table;
 	QZeroConf zeroConf;
 	bool publishEnabled;
 
 private slots:
-	void startPublish();
-	void stopPublish();
+	void appStateChanged(Qt::ApplicationState state);
+	void startPublishClicked();
+	void stopPublishClicked();
 	void addService(QZeroConfService *item);
 	void removeService(QZeroConfService *item);
 };
diff --git a/qzeroconf.h b/qzeroconf.h
index e28a90a..54cd040 100644
--- a/qzeroconf.h
+++ b/qzeroconf.h
@@ -74,12 +74,14 @@ public:
 	~QZeroConf();
 	void startServicePublish(const char *name, const char *type, const char *domain, quint16 port);
 	void stopServicePublish(void);
+	bool publishExists(void);
 	inline void startBrowser(QString type)
 	{
 		startBrowser(type, QAbstractSocket::IPv4Protocol);
 	}
 	void startBrowser(QString type, QAbstractSocket::NetworkLayerProtocol protocol);
 	void stopBrowser(void);
+	bool browserExists(void);
 	void addServiceTxtRecord(QString nameOnly);
 	void addServiceTxtRecord(QString name, QString value);
 	void clearServiceTxtRecords();