UIKit iOS 12.0 Beta 2 to Beta 3 API Differences

NSShadow.h
Modified NSShadow
Protocols
FromNSCoding, NSCopying
ToNSCopying, NSSecureCoding

UIActivityIndicatorView.h
Modified UIActivityIndicatorView.color
Declaration
From@property (nonatomic, readwrite, strong, nullable) UIColor *color
To@property (nonatomic, readwrite, strong, null_resettable) UIColor *color

UIDocument.h
Modified -[UIDocument writeContents:andAttributes:safelyToURL:forSaveOperation:error:]
Declaration
From- (BOOL)writeContents:(nonnull id)contents andAttributes:(nullable NSDictionary<NSFileAttributeKey,id> *)additionalFileAttributes safelyToURL:(nonnull NSURL *)url forSaveOperation:(UIDocumentSaveOperation)saveOperation error:(nullable NSError * _Nullable *)outError
To- (BOOL)writeContents:(nonnull id)contents andAttributes:(nullable NSDictionary *)additionalFileAttributes safelyToURL:(nonnull NSURL *)url forSaveOperation:(UIDocumentSaveOperation)saveOperation error:(nullable NSError * _Nullable *)outError

Modified -[UIDocument fileAttributesToWriteToURL:forSaveOperation:error:]
Declaration
From- (nullable NSDictionary<NSFileAttributeKey,id> *)fileAttributesToWriteToURL:(nonnull NSURL *)url forSaveOperation:(UIDocumentSaveOperation)saveOperation error:(nullable NSError * _Nullable *)outError
To- (nullable NSDictionary *)fileAttributesToWriteToURL:(nonnull NSURL *)url forSaveOperation:(UIDocumentSaveOperation)saveOperation error:(nullable NSError * _Nullable *)outError

UIDocumentBrowserViewController.h
Added -[UIDocumentBrowserViewController transitionControllerForDocumentAtURL:]
Added -[UIDocumentBrowserViewControllerDelegate documentBrowser:didPickDocumentsAtURLs:]
Modified -[UIDocumentBrowserViewController transitionControllerForDocumentURL:]
AvailabilityReplacement
FromAvailablenone
ToDeprecatedtransitionControllerForDocumentAtURL:

Modified -[UIDocumentBrowserViewControllerDelegate documentBrowser:didPickDocumentURLs:]
AvailabilityReplacement
FromAvailablenone
ToDeprecateddocumentBrowser:didPickDocumentsAtURLs: