I'm trying to set up a Master-Detail binding with User Defaults under
OS X 10.4.11. It is correctly reading values I manually put into the
Preferences file. I can select different items in the table and the
detail items display the correct information, but no changes are
written to the file. If I add an item to the array (using a button
connected to the NSArrayController's insert: action), an item is
added to the table. I can edit the name of the item in the table and
change its details and see those changes if I select another table
item the select the new one again, but when I quit my program and
look at the preferences file, an empty dictionary has been added to
the array.
I also have "normal" preference items in the same window that work fine.
Is there something I'm doing wrong or is this just not a supported
usage?
Here's the setup in Interface Builder:
NSArrayController:
Name: Variables
Object class Name: NSMutableDictionary
contentArray bindings:
Bind to: Shared User Defaults
Controller Key: values
Model Key Path: variables
NSTableColumn value bindings:
Bind to: Variables (NSArrayController)
Controller Key: arrangedObjects
Model Key Path: name
NSPopUpButton selectedIndex bindings:
Bind to: Variables (NSArrayController)
Controller key: selection
Model Key Path: lineWidth
NSPopUpButton selectedIndex bindings:
Bind to: Variables (NSArrayController)
Controller key: selection
Model Key Path: lineSymbol
Relevant contents of Preferences file (the second array element is an
empty dictionary that was inserted with the NSArrayController's
insert: action):
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://
www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>variables</key>
<array>
<dict>
<key>lineSymbol</key>
<integer>8</integer>
<key>lineWidth</key>
<integer>2</integer>
<key>name</key>
<string>R</string>
</dict>
<dict/>
<dict>
<key>lineSymbol</key>
<integer>1</integer>
<key>lineWidth</key>
<integer>1</integer>
<key>name</key>
<string>PRES</string>
</dict>
<dict>
<key>lineSymbol</key>
<integer>12</integer>
<key>lineWidth</key>
<integer>3</integer>
<key>name</key>
<string>RHO</string>
</dict>
</array>
</dict>
</plist>
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