Question

I have to sort this array in descening order with the key “likecount”. How can I sort it by specific key? This text is my output which coming on console:

source id key is (
    {

    2 = likecount;
    "This wall post is not from application. Direct from website." = message;
},

    {
    0 = likecount;
    "New integration" = message;
},
    {
    1 = likecount;
    "This is beta testing.. yes" = message;
},

    {
    2 = likecount;
    "hello wall testing.." = message;
}

)

I tried this below code but not getting any result. Still output is without sorted.

NSSortDescriptor *descriptor=[[NSSortDescriptor alloc]initWithKey:@"likecount" ascending:YES];
NSArray *sortdescriptor=[NSArray arrayWithObject:descriptor];
NSArray *sortedarray=[array sortedArrayUsingDescriptors:sortdescriptor];


  NSLog(@"source sorting id key is %@",sortedarray);
 NSLog(@"source s@@@@@@  id key is %@",array);

// array is variable which is holding actual content

Answer 1

An NSSortDescriptor should work for you. Try something like this

NSSortDescriptor *sortd = [[[NSSortDescriptor alloc] initWithKey:@"likecount"
                                           ascending:NO] autorelease];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortd];
sortedArray = [sourceArray sortedArrayUsingDescriptors:sortDescriptors];