iOS: Add a variable to customize where the launch image is taken from

For those who are providing their own launch images for their iOS
projects then QMAKE_IOS_LAUNCH_SCREEN can be set to point to the
location where the launch image to be used over the default.

[ChangeLog][Platform Specific Changes][iOS] Added support for
specifying a launch image to be used for an iOS project. This can be
achieved by using QMAKE_IOS_LAUNCH_SCREEN.

Change-Id: Ibb236655b282132ab5eee747986a93abb9802200
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

3 files changed, 23 insertions, 0 deletions

diff --git a/qmake/doc/src/qmake-manual.qdoc b/qmake/doc/src/qmake-manual.qdoc
index 085cd5c461..5d77e74dcf 100644
--- a/qmake/doc/src/qmake-manual.qdoc
+++ b/qmake/doc/src/qmake-manual.qdoc
@@ -2260,6 +2260,9 @@
     \row
         \li \c ${WATCHOS_DEPLOYMENT_TARGET}
         \li Expands to the value of QMAKE_WATCHOS_DEPLOYMENT_TARGET.
+    \row
+        \li \c ${IOS_LAUNCH_SCREEN}
+        \li Expands to the value of QMAKE_IOS_LAUNCH_SCREEN.
     \endtable
 
     \note When using the Xcode generator, the above \c{${var}}-style
@@ -2283,6 +2286,13 @@
 
     For more information, see \l {Expressing Supported iOS Versions}.
 
+    \section1 QMAKE_IOS_LAUNCH_SCREEN
+
+    \note This variable is used on the iOS platform only.
+
+    Specifies the launch screen that is used by the application. If this is not set
+    then a default launch screen is used.
+
     \section1 QMAKE_LFLAGS
 
     Specifies a general set of flags that are passed to
diff --git a/qmake/generators/mac/pbuilder_pbx.cpp b/qmake/generators/mac/pbuilder_pbx.cpp
index c6aab40d85..93b8151c31 100644
--- a/qmake/generators/mac/pbuilder_pbx.cpp
+++ b/qmake/generators/mac/pbuilder_pbx.cpp
@@ -1615,6 +1615,12 @@ ProjectBuilderMakefileGenerator::writeMakeParts(QTextStream &t)
                             plist_in_text.replace(QLatin1String("@TYPEINFO@"),
                                 (project->isEmpty("QMAKE_PKGINFO_TYPEINFO")
                                     ? QString::fromLatin1("????") : project->first("QMAKE_PKGINFO_TYPEINFO").left(4).toQString()));
+                            QString launchScreen = var("QMAKE_IOS_LAUNCH_SCREEN");
+                            if (launchScreen.isEmpty())
+                                launchScreen = QLatin1String("LaunchScreen");
+                            else
+                                launchScreen = QFileInfo(launchScreen).baseName();
+                            plist_in_text.replace(QLatin1String("${IOS_LAUNCH_SCREEN}"), launchScreen);
                             QFile plist_out_file(Option::output_dir + "/Info.plist");
                             if (plist_out_file.open(QIODevice::WriteOnly | QIODevice::Text)) {
                                 QTextStream plist_out(&plist_out_file);
diff --git a/qmake/generators/unix/unixmake2.cpp b/qmake/generators/unix/unixmake2.cpp
index 48352c0c47..190f5e355a 100644
--- a/qmake/generators/unix/unixmake2.cpp
+++ b/qmake/generators/unix/unixmake2.cpp
@@ -798,6 +798,13 @@ UnixMakefileGenerator::writeMakeParts(QTextStream &t)
             commonSedArgs << "-e \"s,\\$${WATCHOS_DEPLOYMENT_TARGET},"
                           << project->first("QMAKE_WATCHOS_DEPLOYMENT_TARGET").toQString() << ",g\" ";
 
+            QString launchScreen = var("QMAKE_IOS_LAUNCH_SCREEN");
+            if (launchScreen.isEmpty())
+                launchScreen = QLatin1String("LaunchScreen");
+            else
+                launchScreen = QFileInfo(launchScreen).baseName();
+            commonSedArgs << "-e \"s,\\$${IOS_LAUNCH_SCREEN}," << launchScreen << ",g\" ";
+
             if (!isFramework) {
                 ProString app_bundle_name = var("QMAKE_APPLICATION_BUNDLE_NAME");
                 if (app_bundle_name.isEmpty())