iPhone: How to write plist array of dictionary object

Posted by Alessandro on Stack Overflow See other posts from Stack Overflow or by Alessandro
Published on 2010-04-18T21:45:39Z Indexed on 2010/04/18 21:53 UTC
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Filed under:

iphone

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array

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plist

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dictionary

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write

Hello, I'm a young Italian developer for the iPhone. I have a plist file (named "Frase") with this structure:

Root Array
 - Item 0         Dictionary
      Frase        String
      Preferito    Bool
 - Item 1         Dictionary
      Frase        String
      Preferito    Bool
-  Item 2         Dictionary
      Frase        String
      Preferito    Bool
 - Item 3         Dictionary
      Frase        String
      Preferito    Bool
exc.

An array that contains many elements dictionary, all the same, consisting of "Frase" (string) and "Preferito" (BOOL).

The variable "indirizzo", increase or decrease the click of the button Next or Back. The application interface:

http://img691.imageshack.us/img691/357/schermata20100418a20331.png

When I click on AddPreferito button, the item "Preferito" must be YES. Subsequently, the array must be updated with the new dictionary.The code:

(void)addpreferito:(id)sender {

NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"Frase" ofType:@"plist"];
MSMutableArray *frase = [[NSMutableArray alloc] initWithContentsOfFile:plistPath];
NSMutableDictionary *dictionary = [frase objectAtIndex:indirizzo];
[dictionary setValue: YES forKey:@"Preferito"];
[frase replaceObjectAtIndex:indirizzo withObject:dictionary];
[frase writeToFile:plistPath atomically:YES];

}

Why not work? Thanks Thanks Thanks!

Developer IT