how to use nsdictionary to split strings and swap values - objective-c

Question

I'm new to ios, trying to do something like this
self.dataArray = [dictionary valueForKey:#"LIST"];
{
"List": [
{
"FULLNAME": "FirstName, LastName",
"ID": "281"
}
]
}
I want to swap the value which is in 'FULLNAME', that is I want it to be LastName, FirstName
I tried various methods but it would not work. Can someone tell me how to accomplish this?
Thank you

Answer 1

Assuming you know how to do the dictionary manipulation, here's one way to swap the elements in the string:
NSString* name = #"Firstname, Lastname";
// Remove the space after comma (not necessary if you know the name will always
// have a space after comma, then just split on ', '.
NSString* normalizedName = [name stringByReplacingOccurrencesOfString:#", " withString:#","];
// Split the string on ','.
NSArray* nameParts = [normalizedName componentsSeparatedByString:#","];
// Reverse the array
NSArray* reverseNameParts = [[nameParts reverseObjectEnumerator] allObjects];
// Join the array with ', '
NSString* revname = [reverseNameParts componentsJoinedByString:#", "];
NSLog(#"Reversed name parts: %#", revname);

Answer 2

I believe it should be objectForKey instead of valueForKey, if your dictionary contains arrays.
self.dataArray = [dictionary objectForKey:#"LIST"];
for(NSString *fullname in self.dataArray){
if([fullname isEqualToString:#"FULLNAME"]){
NSArray *name = [fullname componentsSeparatedByString:#","];
NSMutableString* reverseName = [NSMutableString string];
for (int i=[name count]-1; i>=0;i--){
[reverseName appendFormat:#", ", [name objectAtIndex:i]];
//reverse name should be what you are looking for..or something close
}
}
}
hope this helps