gistfile1.m

    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* documentsDirectory = [paths objectAtIndex:0];
    
    NSString *plistfile = [documentsDirectory stringByAppendingString:@"Global.plist"];
    
    
    NSDictionary *dictionaryToSerialize = @{@"Hello": @"World", @"Dictionary": @{@"InnerHello": @"InnerWorld"}};
    [dictionaryToSerialize writeToFile:plistfile atomically:YES];
     
    
    NSDictionary *dictionaryToDeserialize = [NSDictionary dictionaryWithContentsOfFile:plistfile];
    NSLog(@"%@", dictionaryToDeserialize[@"Dictionary"]);