Advancing to the next level - using prefs.

Ok, after nailing down the transition between the start, quiz and next level display, we're going to now advance the start and end quiz numbers on a successful completion of a quiz (i.e. all the questions in a sequence, e.g. 1-10, 10-20, etc. are completed).

Actually, the "next level" display is brought up when this occurs, so it's a perfect place to advance the start and end quiz numbers.

So, on the NextLevelViewController, I'll call a new utils method;

[Utils incrementQuizRange];

Here are the utils methods:

+ (void) incrementQuizRange {

NSInteger startNum = [Utils getStartNum];
NSInteger endNum = [Utils getEndNum];
NSInteger diff = endNum - startNum;

startNum = endNum + 1;
endNum = endNum + diff + 1;

[Utils setStartNum: startNum];
[Utils setEndNum: endNum];

}

+ (void) setJlptLevel:(NSInteger)jlptLevel
{

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

[prefs setInteger:jlptLevel forKey:@"jlptLevel"];

[prefs synchronize];

}

+ (void) setStartNum:(NSInteger) startNum
{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

[prefs setInteger:startNum forKey:@"startNum"];

[prefs synchronize];

}

+ (void) setEndNum:(NSInteger) endNum
{


NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

[prefs setInteger:endNum forKey:@"endNum"];

[prefs synchronize];

}

- (IBAction)openQuestionController
{
NSLog(@"openQuestionController");


// todo - check how state was orignally saved

// reset index of shuffled array to zero
appState.shuffledArrayIndex = 0;



NSInteger startNum = [Utils getStartNum];
NSInteger endNum = [Utils getEndNum];


// create an array of keys to the list of question
// this will only contain keys starting from start num and a
// ending with end number
NSMutableArray* questionDictKeys = [NSMutableArray array];

// loop from start number to end number
for (int i = startNum; i <= endNum; i++){

// convert the integer to an object
NSNumber *myKey = [NSNumber numberWithInt:i];

// add the number to the list of keys
[questionDictKeys addObject:myKey];
}


// shuffle the list of keys and put them
// into the app state list of shuffled keys
appState.shuffledQuestionDictKeyList = [questionDictKeys shuffledArray];

// print the keys for debugging
for (int i = 0; i < [appState.shuffledQuestionDictKeyList count]; i++){
NSLog(@"shuffledQuestionDictKeyList[i]: %d", [[appState.shuffledQuestionDictKeyList objectAtIndex: i] intValue]);

}

// reset correct answers to zero
appState.correctAnswers = 0;

// send control to the question controller
questionController = [[QuestionController alloc] init];

[self.navigationController pushViewController:questionController animated:YES];

[questionController release];

}

Actually, the debugger is showing the end number as 2, when it should be like 205 or something. What happened?

Oh. Here's what I meant to do in the end quiz number calculation:

endNum = endNum + diff + 1;

Ok, now let's try it.

Ok, one more thing - we've got to fix the bad data. We can do that with the settings display.

And, voila - that part is complete.