Error writing to plist in documents directory - objective-c

Question

I use the following code to copy a Resources plist file into the documents directory:
BOOL success;
NSError *error;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"Test-Info.plist"];
success = [fileManager fileExistsAtPath:filePath];
if (!success) {
NSString *path = [[[NSBundle mainBundle] resourcePath] stringByAppendingFormat:#"Test-Info.plist"];
success = [fileManager copyItemAtPath:path toPath:filePath error:&error];
NSLog(#"Test-Info.plist successfully copied to DocumentsDirectory.");
}
I get the success message, which is great. I'm assuming it's been copied correctly into the documents folder.
However when I then try to read and write to the saved plist file it returns null:
Key entry in Test-Info.plist:
Key: EnableEverything
Type: Boolean
Value: YES
Write code:
NSString *adKey = #"EnableEverything";
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0];
NSString *path = [documentsDirectoryPath stringByAppendingPathComponent:#"Test-Info.plist"];
NSMutableDictionary *plist = [NSDictionary dictionaryWithContentsOfFile: path];
NSString *enableEverything = [[plist valueForKey:adKey] stringValue];
NSLog(#"****** EXISTING: %# ******", enableEverything); // returns (null)
// Disable in plist.
[plist setValue:0 forKey:adKey]; // will this work?
[plist writeToFile:path atomically:YES]; // this doesn't throw an error?
NSString *enableEverything1 = [[plist valueForKey:adKey] stringValue];
NSLog(#"****** NOW: %# ******", enableEverything1); // returns (null)
Output:
****** EXISTING: (null) ******
****** NOW: (null) ******
My question is why are they (null) when they exist within the plist file?

Answer 1

You are trying to mutate an immutable object.
You need a NSMutableDictionary.
IE
NSMutableDictionary *plist = [[NSDictionary dictionaryWithContentsOfFile: path] mutableCopy];
Also check, if the plist object isnt nil, as any messages can be send to nil without raiing an error. this wouldnt fail, also nothing actually happens.
[plist setValue:0 forKey:adKey]; // will this work?
[plist writeToFile:path atomically:YES]; // this doesn't throw an error?
as the source path is nil, you are most like not copying the file during compilation bundling. drag it here:

Answer 2

Try this for nsbundle path for resource
NSString *path= [[NSBundle mainBundle] pathForResource:#"SportsLogo-Info" ofType:#"plist"];
Try allocating
NSMutableDictionary *plist = [[NSMutableDictionary alloc] initWithDictionary:[NSDictionary dictionaryWithContentsOfFile:path]];
Also check if the file has been copied or not. Go to Library=>Application Support=>iPhone Simulator=>folder named your version of simulator iOS=>Applications=>Find the right folder of your project=>Documents see if the plist file is there