Writing

LinusR · 12-16-2010, 08:31 AM

Hi all,

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

Code:

<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:

Code:

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:

Code:

	[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

MiniRobinho · 12-20-2010, 05:36 PM

You've accessed the plist fine, but you are setting the value wrong.

First get the dictionary with key "fruits":

Code:

NSMutableDictionary *fruits = [plistDict objectForKey:@"fruits"];

In fruits set the value "Peach" for the key "fruit1":

Code:

[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

LinusR · 12-23-2010, 05:22 AM

Thanks for help, but I think I do something wrong.
Now I have code like this:

Code:

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:

Code:

<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?

MiniRobinho · 12-23-2010, 11:25 AM

Try the below - setObject instead of setValue.

Code:

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

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

Code:

[plistDict writeToFile:fileDirectory atomically: YES];

LinusR · 12-24-2010, 02:50 AM

thanks for help, now it works. Thanks!