How to Store multiple dictionary in NSUserDefaults - ios

Question

I have two Viewcontrollers in FirstVC i build 5 UITextField for registration ,this TextField value are stroed in dictionary finally the dictionary stored in NSUserdefault then in SecondVC i want to show this data
My problem is that each time when i add new discretionary in NSUserdefault The old one dictionary was replaced
i want data of all dictionary.
below is code of my FirstVC
-(void)btnReg
{
//data add in disctionary
for (int i=1; i<=5; i++)
{
UITextField *txtTemp=(UITextField *)[self.view viewWithTag:i];
[discRege setObject:[NSNumber numberWithInt:count] forKey:#"no"];
[discRege setObject:txtTemp.text forKey:[arraylblName objectAtIndex:i-1]];
}
//dictionary add in nsuserdefault
[[NSUserDefaults standardUserDefaults]setObject:discRege forKey:#"ABC"];
[[NSUserDefaults standardUserDefaults]synchronize];
//push to SecondVc
secondViewController *objSec=[[secondViewController alloc]init];
[self.navigationController pushViewController:objSec animated:YES];
[self.navigationController setNavigationBarHidden:false];
}
below is code of my SecondVC
ArratTemp =[[NSUserDefaults standardUserDefaults]objectForKey:#"ABC"] ;
if (!ArratTemp )
{
ArratTemp =[[NSMutableArray alloc]init];
}
else
{
ArratTemp = [[[NSUserDefaults standardUserDefaults]objectForKey:#"ABC"]mutableCopy];
}
NSLog(#"%#",ArratTemp);

Answer 1

Every time you are using the same key and replacing the existing dictionary object...
// Using the same key will overwrite the last saved dictionary.
[[NSUserDefaults standardUserDefaults] setObject:discRege forKey:#"ABC"];
Instead of storing it as a dictionary, store it as an array of dictionaries. Whenever you add new registration, fetch the saved array, add new dictionary object into it and update the userDefaults with that array.
mutableArray = [[[NSUserDefaults standardUserDefaults]objectForKey:#"ABC"] mutableCopy];
[mutableArray addObject:discReg];
[[NSUserDefaults standardUserDefaults] setObject:mutableArraay forKey:#"ABC"];
[[NSUserDefaults standardUserDefaults] synchronize];
Hope it helps.

Answer 2

You're overwriting the same disctionary every time.
You have two solutions :
Solution 1.
Store different dictionaries under different keys, not all under "ABC". So in your for loop can use the index (i) to have multiple entries, instead of just ABC every time. Here it's a simple matter you can resolve yourself. Make sure to not store everything under the same Key, and you'll find them ;) For example, you could save under [NSNumber numberWithInt:i]and then browse your NSUserDefaults for 0, 1, 2, 3... and so on. I recommend against this btw, solution 2 is the way to go.
Solution 2.
Store all your dictionaries in an array, and then store the array in the NSUserDefaults.
For that, simply create an NSMutableArray that you keep empty, then add dictionaries in it !
NSMutableArray dataArray = [[NSMutableArray alloc]init];
for (int i=1; i<=5; i++)
{
//Creating new dictionary
NSMutableDictionary *currentDict = [[NSMutableDictionary alloc]init];
//Getting the text we want
UITextField *txtTemp =(UITextField *)[self.view viewWithTag:i];
NSString *text = txtTemp.text;
//This is here because you had it
[currentDict setObject:[NSNumber numberWithInt:count] forKey:#"no"];
//All dictionaries will have key = name of the Label,
//but you could change it to something static, like
// "Content" for example. It'll be easier to find later
[currentDict setObject:text forKey:[arraylblName objectAtIndex:i-1]];
//Adding that newly formed dictionary to the mutable array.
[dataArray addObject:currentDict];
}
//Adding the array containing dictionaries to the NSUSerDefaults
[[NSUserDefaults standardUserDefaults]setObject:dataArray forKey:#"ABC"];
Note : I'm not exactly sure what you're doing with the dictionaries in the for loop, but since you didn't show the code, I'm guessing its' not part of the question. With my answer you have enough information to make some corrections if needed. All you need to remember is :
Create a dictionary per answer, and not one for all
Put each dictionary in the same array
Save the array (containing all the dictionaries)