how to remove object from NSDictionary
Solution 1
First you need to use a NSMutableDictionary
and put this code :
[countriesToLiveInDict removeObjectForKey:@"Countries"];
[countriesToLiveInDict setObject:sortedArray forKey:@"Countries"];
Solution 2
First of all make your NSDictionary to NSMutableDictionary & then write the following line of code
[countriesToLiveInDict removeObjectForKey:@"Countries"];
This will definitely resolve your issue.
Solution 3
NSDictionary
cannot remove anything, please use NSMutableDictionary
, like this:
NSMutableDictionary *countriesToLiveInDict = [NSMutableDictionary dictionaryWithObject:countriesToLiveInArray forKey:@"Countries"];
V.V
I am an iPhone/iPad application and Game developer. Also working in c# applications and Web development.
Updated on February 23, 2020Comments
-
V.V about 4 years
Hi i am having a NSdictionary in which i am adding a array with key "countries ". Now i take the value of this dictionary into array and sort the array in alpahbatical order .Now i want to add this array into my Dictionary (that is i want to update my dictionary with new sorted array and remove the old array from it )........ how to do this
My code is as follows
NSArray *countriesToLiveInArray = [NSArray arrayWithObjects:@"Iceland", @"Greenland", @"Switzerland", @"Norway", @"New Zealand", @"Greece", @"Italy", @"Ireland", nil]; NSDictionary *countriesToLiveInDict = [NSDictionary dictionaryWithObject:countriesToLiveInArray forKey:@"Countries"]; NSArray *tmpary = [countriesToLiveInDict valueForKey:@"Countries"]; NSLog(@"ary value is %@",ary); NSArray *sortedArray = [tmpary sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]; NSLog(@"sortedArray is %@",sortedArray);
Here i want to remove the countriesToLiveInArray and replace it with sortedArray with same key value i.e. Countries Thanks in advance..