Add support for iOS 13 (#1)

* Add support for iOS 13 changes on UIWindow management

* update travis

* Update podspec to version 2.3.1

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode9
+osx_image: xcode11.2
 script:
     - xcodebuild clean build test -workspace ActionSheetPicker-3.0.xcworkspace -scheme ActionSheetPicker -sdk iphonesimulator -destination "platform=iOS Simulator,OS=11.0,name=iPhone X" ONLY_ACTIVE_ARCH=NO
 

ActionSheetPicker-3.0.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do | s |
     s.name = 'ActionSheetPicker-3.0'
-    s.version = '2.3.0'
+    s.version = '2.3.1'
     s.summary = 'Better version of ActionSheetPicker with support iOS7 and other improvements.'
     s.homepage = 'http://skywinder.github.io/ActionSheetPicker-3.0'
     s.license = 'BSD'

Pickers/SWActionSheet.m

@@ -87,13 +87,25 @@ - (UIWindow *)window
     }
     else
     {
-        return SWActionSheetWindow = ({
-            UIWindow *window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
-            window.windowLevel        = self.windowLevel;
-            window.backgroundColor    = [UIColor clearColor];
-            window.rootViewController = [SWActionSheetVC new];
-            window;
-        });
+        UIWindow *window = nil;
+        if (@available(iOS 13.0, *)) {
+            UIScene *scene = [UIApplication sharedApplication].connectedScenes.allObjects.firstObject;
+            if (scene && [scene isKindOfClass:[UIWindowScene class]]) {
+                UIWindowScene *windowScene = (UIWindowScene *)scene;
+                window = [[UIWindow alloc] initWithWindowScene:windowScene];
+            }
+        }
+
+        if (window == nil) {
+            window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
+        }
+
+        window.windowLevel        = self.windowLevel;
+        window.backgroundColor    = [UIColor clearColor];
+        window.rootViewController = [SWActionSheetVC new];
+
+        SWActionSheetWindow = window;
+        return SWActionSheetWindow;
     }
 }