Sorting NsMutable Array

Question

I am getting floor names and storing in _floorNames (NSMutableArray) by using

_floorNames=[conferenceHall floorDetails:office];


NSLog(@"floor names=%@",_floorNames);

This will print floor names like this.

 GROUND,
 THIRD,
 FIRST,
 SECOND

Now i want to sort that floor names NsMutableArray as

GROUND,
FIRST,
SECOND,
THIRD

I have used

 NSSortDescriptor *aa=[[NSSortDescriptor alloc]initWithKey:floor ascending:YES                                                           selector:@selector(localizedCaseInsensitiveCompare:)];

 NSArray *descriptors = [NSArray arrayWithObjects:aa, nil]; 
   a = [array sortedArrayUsingDescriptors:descriptors];

But it will crash my application. Any suggestions ...

Suggestions: #1: don't use the Xcode tag, it's inappropriate. #2: format your code, it's impossible to read. #3: ask a real question - I couldn't deduce what you expect to happen and what actually happens. — user529758
– user529758, Commented Feb 19, 2013 at 6:21
My floorNames mutableArray containes floor names like GROUND, THIRD, FIRST, SECOND. How to sort this mutableArray to get GROUND, FIRST, SECOND ,THIRD. — user2043033
– user2043033, Commented Feb 19, 2013 at 6:27

Ravindhiran · Accepted Answer · 2013-02-19 07:39:56Z

4

Try this,

NSArray *arrFloorNames=[[NSArray alloc]initWithObjects:@"GROUND",@"THIRD",@"FIRST",@"SECOND", nil];
arrFloorNames = [arrFloorNames sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
NSLog(@"%@",arrFloorNames);

edited Feb 19, 2013 at 7:39

answered Feb 19, 2013 at 7:11

Ravindhiran

5,38410 gold badges54 silver badges83 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

user2043033 Over a year ago

arrFloorNames = [arrFloorNames sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)]; NSLog(@"%@",arrFloorNames); By using this i am getting bad access in my application.

Anoop Vaidya Over a year ago

@user2043033 : How this code sorts as per your requirement. Kindly let me know.

Anoop Vaidya · Accepted Answer · 2013-02-19 07:01:48Z

0

What you want is you never get!!!

"GROUND, THIRD, FIRST, SECOND" to "GROUND, FIRST, SECOND ,THIRD" is what you want.

No algorithm can sort these strings based on their internal representation in numerals. This is something like, 0..1..2..3. You want to sort these integers written in English. Sorting can be done alphabetically so your result will be as First, Groung, Second, Third.

How to achieve?

You need to create an object of dictionary, with mapped value of Third to 3, second to 2, ground to 0. Then sort those numerical values. And then get Keys based on values(0,1,2etc).

answered Feb 19, 2013 at 7:01

Anoop Vaidya

46.6k15 gold badges115 silver badges144 bronze badges

Collectives™ on Stack Overflow

Sorting NsMutable Array

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related