UIKit iOS xcode9 beta4

#UIKit.framework

diff -ruN /Applications/Xcode9-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UINavigationBar.h /Applications/Xcode9-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UINavigationBar.h
--- /Applications/Xcode9-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UINavigationBar.h	2017-06-30 23:33:13.000000000 -0400
+++ /Applications/Xcode9-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UINavigationBar.h	2017-07-20 23:01:09.000000000 -0400
@@ -81,11 +81,11 @@
 
 /* You may specify the font, text color, and shadow properties for the title in the text attributes dictionary, using the keys found in NSAttributedString.h.
  */
-@property(nullable,nonatomic,copy) NSDictionary<NSString *,id> *titleTextAttributes NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
+@property(nullable,nonatomic,copy) NSDictionary<NSAttributedStringKey, id> *titleTextAttributes NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
 
 /* You may specify the font, text color, and shadow properties for the large title in the text attributes dictionary, using the keys found in NSAttributedString.h.
  */
-@property(nullable, nonatomic, copy) NSDictionary <NSAttributedStringKey, id> *largeTitleTextAttributes UI_APPEARANCE_SELECTOR API_AVAILABLE(ios(11.0)) API_UNAVAILABLE(tvos);
+@property(nullable, nonatomic, copy) NSDictionary<NSAttributedStringKey, id> *largeTitleTextAttributes UI_APPEARANCE_SELECTOR API_AVAILABLE(ios(11.0)) API_UNAVAILABLE(tvos);
 
 - (void)setTitleVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
 - (CGFloat)titleVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
diff -ruN /Applications/Xcode9-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIScreen.h /Applications/Xcode9-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIScreen.h
--- /Applications/Xcode9-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIScreen.h	2017-06-30 23:33:14.000000000 -0400
+++ /Applications/Xcode9-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIScreen.h	2017-07-14 03:19:16.000000000 -0400
@@ -22,6 +22,8 @@
 // Object is the UIScreen which changed. [object currentMode] is the new UIScreenMode.
 UIKIT_EXTERN NSNotificationName const UIScreenModeDidChangeNotification NS_AVAILABLE_IOS(3_2);
 UIKIT_EXTERN NSNotificationName const UIScreenBrightnessDidChangeNotification NS_AVAILABLE_IOS(5_0);
+// Object is the UIScreen which changed. [object isCaptured] is the new value of captured property.
+UIKIT_EXTERN NSNotificationName const UIScreenCapturedDidChangeNotification NS_AVAILABLE_IOS(11_0);
 
 // when the connected screen is overscanning, UIScreen can attempt to compensate for the overscan to avoid clipping
 typedef NS_ENUM(NSInteger, UIScreenOverscanCompensation) {
@@ -57,6 +59,7 @@
 @property(nonatomic,readonly) UIEdgeInsets overscanCompensationInsets NS_AVAILABLE_IOS(9_0);  // The amount that should be inset to avoid clipping
 
 @property(nullable, nonatomic,readonly,strong) UIScreen *mirroredScreen NS_AVAILABLE_IOS(4_3);          // The screen being mirrored by the receiver. nil if mirroring is disabled or unsupported. Moving a UIWindow to this screen will disable mirroring
+@property(nonatomic,readonly,getter=isCaptured) BOOL captured NS_AVAILABLE_IOS(11_0); // True if this screen is being captured (e.g. recorded, AirPlayed, mirrored, etc.)
 
 @property(nonatomic) CGFloat brightness NS_AVAILABLE_IOS(5_0) __TVOS_PROHIBITED;        // 0 .. 1.0, where 1.0 is maximum brightness. Only supported by main screen.
 @property(nonatomic) BOOL wantsSoftwareDimming NS_AVAILABLE_IOS(5_0) __TVOS_PROHIBITED; // Default is NO. If YES, brightness levels lower than that of which the hardware is capable are emulated in software, if neccessary. Having enabled may entail performance cost.