NSMutableDictionary - entries appear to be over-written by each addition - objective-c

Question

I'm fairly new to Objective-C; but have been coding for years and this one really stumps me.
I'm trying to build an iPhone app and wanted to create a "settings" screen which will use a Table format. (Xcode 5.1.1).
I want to future proof the main Settings screen and make it easy for the application coding by hiding the "hard work" in subroutines/methods.
I may be getting too clever but I've created a class for each 'setting' that contains screen prompts, default values etc and using an Enum to cross-reference it (so the compiler will highlight typos etc)
The problem I'm encountering is that when I add entries to my NSMutableDictionary and use lldb to print the values; every entry seems to have the same "key" and values. I've tried converting the eNum to an NSNumber and also as an NSString -- no difference in the result - so I'm obviously doing something else daft but just can't see it
The following code is from various .m & .h files, I've omitted boring stuff that you always "have to have" to keep it short
// basic x-ref I want to use in my code
typedef NS_OPTIONS(NSInteger, ConfigurationType) {
unDefined = -1,
Server = 0,
Id = 1,
Phone = 2
};
// definition for a "single" Settings value
#interface SettingDefinition : NSObject
#end
#implementation SettingDefinition
ConfigurationType _cfgType;
NSString *_cfgName;
NSString *_screenTitle;
NSString *_value;
- (NSString *)description
{
NSString *className = NSStringFromClass([self class]);
return [NSString stringWithFormat:#"<%#: x%p Type=%d dbKey=%# '%#' -> %#>", className, self, _cfgType, _cfgName, _screenTitle, _value];
}
- (id)initType:(ConfigurationType)cfgOption
withDbKey: (NSString*)dbKey
asOptionTitle:(NSString*)cfgTitle
withValue:(NSString*)itmValue
{
self = [super init];
if (self) {
_screenTitle = cfgTitle;
_cfgName = dbKey;
_cfgType = cfgOption;
_value = itmValue;
}
return self;
}
#end
#interface Configuration : NSObject
#end
#implementation Configuration {
NSMutableDictionary *Settings; // List of Setting structures
};
- (id)init {
self = [super init];
if (self) {
Settings = [[NSMutableDictionary alloc]init];
[self add:Server withDbKey:#"Server" asOptionTitle:#"Server"];
[self add:Id withDbKey:#"Id" asOptionTitle:#"Your ID"];
[self add:Phone withDbKey:#"Phone" asOptionTitle:#"Phone No."];
}
return self;
}
- (void) add:(ConfigurationType)cfgOption
withDbKey:(NSString*)dbKey
asOptionTitle:(NSString*)cfgTitle
{
NSString * itmValue = [self configurationValue: cfgOption cfgName:dbKey];
SettingDefinition *x = [[SettingDefinition alloc]
initType: cfgOption
withDbKey: dbKey
asOptionTitle: cfgTitle
withValue: itmValue];
[Settings setObject:x forKey:[self asKey:cfgOption]];
}
- (NSString *) asKey:(ConfigurationType) settingType {
NSString *rc = [NSString stringWithFormat:#"%d", settingType];
return rc;
}
- (NSString *) configurationValue:(ConfigurationType) settingType {
// returns a suitable value from my system setup
// which is initially a null value until the user sets everything up
}
the debug window shows the following when I break after the final call to [self add: ...]
(lldb) po Settings
{
0 = "<SettingDefinition: x0x8e7c280 Type=2 dbKey=Phone 'Phone No.' -> (null)>";
1 = "<SettingDefinition: x0x8c703a0 Type=2 dbKey=Phone 'Phone No.' -> (null)>";
2 = "<SettingDefinition: x0x8e7c310 Type=2 dbKey=Phone 'Phone No.' -> (null)>";
}
The (null) is obviously due to no data in 'value' yet; but why do they all show as 'Phone'; if I break after the second call to [self add:..] they all show as 'Id'
UPDATE:
DOH! obviously they're globals (I've been using another IDE where everything is local until exposed) .. If I enclose them in braces in the implementation as the documentation states then the exhibited problem vanishes. I have properties to access the variables but as the setter does more than just set the memory, I thought I'd need my "own" variables to hold the data.. said it was something daft .. thank you!