In the Application Delegate didFinishLaunching method, I am using the following code to build up a new NSDictionary to be used as the new settings bundle for the user:
NSNumber *testValue = (NSNumber*)[[NSUserDefaults standardUserDefaults] objectForKey:@"settingsversion"];
if (testValue == nil)
{
NSNumber *numNewDB = [NSNumber numberWithBool:NO];
NSNumber *numFirstUse = [NSNumber numberWithBool:YES];
NSDate *dateLastStatic = [NSDate date];
NSDate *dateLastMobile = [NSDate date];
NSNumber *numSettingsversion = [NSNumber numberWithFloat:1.0];
NSDictionary *appDefaults = [NSDictionary dictionaryWithObjectsAndKeys:
numNewDB, @"newdb",
numFirstUse, @"firstuse",
numSettingsversion, @"settingsversion",
dateLastStatic, @"laststaticupdate",
dateLastMobile, @"lastmobileupdate",
nil];
[[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults];
[[NSUserDefaults standardUserDefaults] synchronize];
}
Later in another ViewController I am trying to read back a value from that same Dictionary, saved as the NSUserDefaults - well at least I thought it would, but I don't get any valid object pointer for the desired member lastUpdate back there:
in .h file:
NSDate *lastUpdate;
in the .m file in a member function:
lastUpdate = (NSDate *)[[NSUserDefaults standardUserDefaults] objectForKey:@"laststaticupdate"];
Even, if I print out the content of [NSUserDefaults standardUserDefaults] I only get this:
2010-04-29 15:13:22.322 myApp[4136:207] Content of UserDefaults: <NSUserDefaults: 0x11d340>
This leads me to the conclusion that there is no standardUserDefaults dictionary somewhere in memory or it cannot be determined as such a structure.
Edit: Every time, I restart the app ión the device, the check for testValue is Nil and I am building up the dictionary again but after one run it should be persistent on the Phone, right?
Am I doing something wrong somewhere in between? I have the feeling that I yet didn't really understand how to load and save settings persistent for a certain application on the iPhone.
Is there anything I have to do additionally to this? Integrating a settings.bundle in XCode or saving the dictionary manually to the Documents folder?
Can someone help me out here? Thanks a lot!
