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Writing

LinusRLinusR Posts: 17Registered Users
in Mac OS X Development
Hi all,

I have a problem: I have a property list looking like this:

<dict>
	<key>fruits</key>
	<dict>
		<key>fruit1</key>
		<string>Banana</string>
		<key>fruit2</key>
		<string>Apple</string>
	</dict>
</dict>

I would like to change the value of fruit 1. How can I do this? My actual code is:

NSString *fileDirectory;
	fileDirectory = [[[NSBundle mainBundle] pathForResource:@\"Fruits\" ofType:@\"plist\"] retain];
	NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:fileDirectory];

I don't know what to do now. My actual not working code is:

	[plistDict setValue:fruit1 forKey:@\"Peach\"];
	[plistDict writeToFile:fileDirectory atomically: YES];

Now a new key and value gets build.

Can anyone help?

Thanks for every help
Post edited by LinusR on
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Replies

  • MiniRobinhoMiniRobinho Posts: 160Registered Users
    You've accessed the plist fine, but you are setting the value wrong.

    First get the dictionary with key "fruits":
    NSMutableDictionary *fruits = [plistDict objectForKey:@\"fruits\"];


    In fruits set the value "Peach" for the key "fruit1":
    [fruits setValue:@\"Peach\" forKey:@\"fruit1\"];
    [plistDict writeToFile:fileDirectory atomically: YES];


    Hope that makes sense. If you don't know why certain things have been done just say
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  • LinusRLinusR Posts: 17Registered Users
    Thanks for help, but I think I do something wrong.
    Now I have code like this:
    NSString *fileDirectory;
    	fileDirectory = [[[NSBundle mainBundle] pathForResource:@\"Datas\" ofType:@\"plist\"] retain];
    	NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:fileDirectory];
    	
    	NSMutableDictionary *plistDictName = [plistDict objectForKey:@\"Fruit\"];
    	
    	[plistDictName setValue:@\"Apple\" forKey:@\"fruit1\"];


    But it doesn't work. Then I created a new dict in the Plist file "Datas.plist" with the name "Fruit" but that does not work as well. My "Datas.plist" file looks like this now:

    <dict>
    	<key>Fruit</key>
    	<dict>
    		<key>fruit1</key>
    		<string></string>
    	</dict>
    </dict>


    Nothing happens when I click the button in my application. The string of the key "fruit1" keeps empty.

    What do I wrong?
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  • MiniRobinhoMiniRobinho Posts: 160Registered Users
    Try the below - setObject instead of setValue.

    [plistDictName setObject:@\"Apple\" forKey:@\"fruit1\"];


    Make sure that you are saving at the end as well:

    [plistDict writeToFile:fileDirectory atomically: YES];
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  • LinusRLinusR Posts: 17Registered Users
    thanks for help, now it works. Thanks!
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