Here is a list of all documented properties with links to the class documentation for each member:

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

- u -

• uncompressedSize : <OFArchiveEntry>, <OFMutableArchiveEntry>
• underlined : OFStdIOStream
• underlyingStream : OFDeflate64Stream, OFDeflateStream, OFTLSStream
• unsignedCharValue : OFNumber, OFString
• unsignedIntValue : OFNumber, OFString
• unsignedLongLongValue : OFNumber, OFString, OFXMLNode
• unsignedLongValue : OFNumber, OFString
• unsignedShortValue : OFNumber, OFString
• up : OHGameControllerDirectionalPad
• uppercaseString : OFString
• user : OFIRI, OFMutableIRI
• userInfo : OFNotification
• usesTLS : OFHTTPServer
• UTF16String : OFString
• UTF16StringLength : OFString
• UTF32String : OFString
• UTF8String : OFString
• UTF8StringLength : OFString
• UUIDString : OFUUID