Mutable Array to NSUserDefaults?!?

[starwarsdevwookie59]

So I have some code that save an array in the appwillterminate section and then in the appdidload it pulls it back in. It works great for editing the one item in the array, however, as soon as you start to add objects to the array it crashes. I read something about needed to save a mutable array as a specific "mutable copy" and then it would allow you to add and delete it. My app really depends on me being able to save the state of my nsmutable arrays and then retrieve it. Im having much dificulty doing so though. Has any one gotten this to work? Heres my code:

- (void)applicationDidFinishLaunchingUIApplication *)application {
projectsArray = [[NSUserDefaults standardUserDefaults] objectForKey:@"projectsArray"];
if (projectsArray == NULL) {
projectsArray = [[NSMutableArray arrayWithObjects:@"New Project", nil] retain];
}
}

- (void)applicationWillTerminateUIApplication *)application {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObjectrojectsArray forKey:@"projectsArray"];
// Save data if appropriate
}

Any help would be sweet thanks!!!

[smasher]

When you copy or save a mutable array, the copy is immutable - so when you're loading, you're getting an immutable array back. You need to make a mutable copy of the array you loaded; then you can change it all you like.

[starwarsdevwookie59]

Originally Posted by smasher

When you copy or save a mutable array, the copy is immutable - so when you're loading, you're getting an immutable array back. You need to make a mutable copy of the array you loaded; then you can change it all you like.

Thanks for the reply. I changed my code so it makes it mutable but my app still crashes! Basically i have a table that is filled with a mutable array and when you click the add button it adds one to that array. Anytime i do that and relaunch with this code it quits on me! How do i save nsmutable arrays properly?!?

[BrianSlick]

Well, show what you are doing. How are you making it mutable? Use the code tags.

[starwarsdevwookie59]

Originally Posted by BrianSlick

Well, show what you are doing. How are you making it mutable? Use the code tags.

Got IT!!! Code was fine it was a logic error on my part. I was adding another cell from the first array but it required other data to be added too, not just the cells title. I added the other arrays it uses and its fine! Thanks for all the help!!!

[jagds]

- (void)applicationDidFinishLaunchingUIApplication *)application {
projectsArray = [[NSUserDefaults standardUserDefaults] objectForKey:@"projectsArray"];
if (projectsArray == NULL) {
projectsArray = [[NSMutableArray arrayWithObjects:@"New Project", nil] retain];
}
}

- (void)applicationWillTerminateUIApplication *)application {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObjectrojectsArray forKey:@"projectsArray"];
// Save data if appropriate
}


In your code.. What is "projectArray" and "New Array"..?
I am new in iphone development so i dont know how to use NSUserdefaults in code.
I want save array value in it.

[mishti]

Originally Posted by starwarsdevwookie59

Got IT!!! Code was fine it was a logic error on my part. I was adding another cell from the first array but it required other data to be added too, not just the cells title. I added the other arrays it uses and its fine! Thanks for all the help!!!

hi,

plz May u give me idea , how to do?

thanx