Question

I have a simple questionnaire app where I need to save the history of surveys displayed by the date when surveys has been taken. It has to work like this – in tableview user first can see date, after tapping the date he can see answers of the survey. I’ll use NSUserDefaults for history. Any suggestions?

Answer 1

If you are going to use NSUserDefaults, you could keep all your surveys in NSMutableDictionary and your key would be just NSDate strings.

Then to get sorted array of surveys you can use the following code:

NSArray *sortedKeys = [[surveysTaken allKeys] sortedArrayUsingSelector: @selector(compare:)];
NSMutableArray *sortedValues = [NSMutableArray array];
for (NSString *key in sortedKeys)
    [sortedValues addObject: [surveysTaken objectForKey: key]];

As a result you will get sortedValues array.