R

radian
readsDataToEndOfFile
recording
rectangle
  drawing
  drawing in Canvas
regulating events
relative
release
reload
report coordinates
requestWithURL
requestWithURL:cachePolicy:timeoutInterval:
resetGPS
resetStandardUserDefaults
Resig, John
resignFirstResponder, 2^nd
resort array
resourcePath
Responder
responder
  chain, 2^nd
restore
results.insertId
results.rows.item
results.rows.length
results.rowsAffected
retain
returnKeyType
rhombus function
rightBarButtonItem
Ritchie, Dennis
Root.plist
  editing
Root.strings
RootViewController
rotate
rotate animation
row, iUI
RSS (Really Simple Syndication), 2^nd
RSS reader
rssViewController
Ruby on Rails