CODEWITHSUNDEEP
objective-cioscocoa-touchsortingnsmutablearray
praveena
praveena

Reputation: 723

How can I sort strings in NSMutableArray into alphabetical order?

I have a list of strings in an NSMutableArray, and I want to sort them into alphabetical order before displaying them in my table view.

How can I do that?

Upvotes: 41

Views: 37812

Answers (4)

Kupendiran iOS
Kupendiran iOS

Reputation: 217

It's easy to get the ascending order. Follow the bellow steps,,,

Model 1 :

NSSortDescriptor *sortDesc = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];
sortedArray=[yourArray sortedArrayUsingDescriptors:@[sortDesc]];

If you want the sorting to be case insensitive, you would need to set the descriptor like this,,
Model 2 :

NSSortDescriptor * sortDesc = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES selector:@selector(caseInsensitiveCompare:)]; 
sortedArray=[yourArray sortedArrayUsingDescriptors:@[sortDesc]];

Upvotes: 1

Narasimha Nallamsetty
Narasimha Nallamsetty

Reputation: 1263

For me this worked....

areas = [areas sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];

Here areas is NSArray. I hope it helps someone.

Upvotes: 0

aksh1t
aksh1t

Reputation: 5448

Here's an updated answer for Swift:

  • Sorting can be done in Swift with the help of closures. There are two methods - sort and sorted which facilitate this.

    var unsortedArray = [ "H", "ello", "Wo", "rl", "d"]
var sortedArray = unsortedArray.sorted { $0.localizedCaseInsensitiveCompare($1) == NSComparisonResult.OrderedAscending }

    Note: Here sorted will return a sorted array. The unsortedArray itself will not be sorted.

  • If you want to sort unsortedArray itself, use this

    unsortedArray.sort { $0.localizedCaseInsensitiveCompare($1) == NSComparisonResult.OrderedAscending }

Reference :

  • Here is the documentation for Swift's sorting methods.

  • Docs for different String comparison methods here.

Optional:

Instead of using localizedCaseInsensitiveCompare, this could also be done:

stringArray.sort{ $0.lowercaseString < $1.lowercaseString }

or even 

stringArray.sort{ $0 < $1 }

if you want a case sensitive comparison

Upvotes: 8

Vijay-Apple-Dev.blogspot.com
Vijay-Apple-Dev.blogspot.com

Reputation: 25692

There is the following Apple's working example, using sortedArrayUsingSelector: and localizedCaseInsensitiveCompare: in the Collections Documentation:

sortedArray = [anArray sortedArrayUsingSelector:
                       @selector(localizedCaseInsensitiveCompare:)];

Note that this will return a new sorted array. If you want to sort your NSMutableArray in place, then use sortUsingSelector: instead, like so:

[mutableArray sortUsingSelector:@selector(localizedCaseInsensitiveCompare:)];

Upvotes: 127

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