Appending data to PLIST - iPhone

Question

we need to be able to read in the contents of an existing plist file then add to the array / dictionary then write this new data to the plist file. The stricture is simple.

Answer 1

You do it like this:

// Get current content.
NSDictionary *oldContent = [NSDictionary dictionaryWithContentsOfFile:plistPath];
// Make a mutable copy.
NSMutableDictionary *newContent = [[oldContent mutableCopy] autorelease];
// Add new stuff.
[newContent setObject:newObject forKey:newKey];
// Now, write the plist:
[newContent writeToFile:plistPath atomically:YES];

There is no need to use NSPropertyListSerialization at all here.

Answer 2

You have a Dictionary to begin with,

124818240124810284.JPG //[valueForKey: 124818240124810284.JPG] 



                    item 0          String     Some Attribute 1 //[valueForKey:124818240124810284.JPG] valueForKey:Item 0];
                    item 1          String     Some Attribute 2 //[valueForKey:124818240124810284.JPG] valueForKey:Item 1];


    354273577823597297.JPG    //[valueForKey: 354273577823597297.JPG]    
                    item 0          String     Some Attribute 1 //[valueForKey: 354273577823597297.JPG] valueForKey:Item 0];
                    item 1          String     Some Attribute 2 //[valueForKey: 354273577823597297.JPG] valueForKey:Item 1;

And so on.....To add to it create a new dictionary with your new value/key pairs :

 NSMutableDictionary *newAttributes = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"Attribute 0",@"Item 0",nil];

Make a new dictionary:

   NSMutableDictionary *newEntry = [[NSMutableDictionary alloc]initWithObjectsAndKeys:newAttributes,@"xxxxx.jpg", nil];//Makes a new dictionary

Or to append the data to the existing dictionary:

[dictionaryToAppend setValue:newAttribues ForKey:xxxxx.jpg"];