4. Read User Defaults

For each cell property dictionary, if defaults == nil then (suggested):

NSNumber *enabled = [[NSUserDefaults standardUserDefaults] objectForKey:@"enabled"];
[enabled boolValue];

else if defaults == "myOwnDefaults" then:

NSString *libraryPath = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).firstObject;
NSString *uicfgPath = [libraryPath stringByAppendingPathComponent:@"uicfg"];
NSString *myOwnDefaultsPath = [uicfgPath stringByAppendingPathComponent:@"myOwnDefaults"];
NSDictionary *myOwnDefaults = [NSDictionary dictionaryWithContentsOfFile:myOwnDefaultsPath];
NSNumber *enabled = myOwnDefaults[@"enabled"];
[enabled boolValue];

defaults is a base property defined in Base Cell Properties.