How do I sort an NSDictionary by integer value? - ios

Question

I have a NSDictionary. When I print it, it looks like this:
{
3gZ0qtk0yMUEvtSmz2RW40Y7AC83 = 12;
USXhV0QYkpbSzAmXgfeteXHuoqg2 = 25;
UTPFBV5Q5IgTh17060c6WxNDQCO2 = 1;
fqsspZtskWVheqUQQtROepixsGB2 = 256;
}
I want to sort it so that it looks like this:
{
fqsspZtskWVheqUQQtROepixsGB2 = 256;
USXhV0QYkpbSzAmXgfeteXHuoqg2 = 25;
3gZ0qtk0yMUEvtSmz2RW40Y7AC83 = 12;
UTPFBV5Q5IgTh17060c6WxNDQCO2 = 1;
}
All of the methods I see needs a key name but I don't understand that. There is no key name. Sorry if this is duplicate but everything I try from other questions doesn't work. There's just too many ways out there and I get all kinds of errors and other problems so I want to know the best (latest), and most efficient way to sort NSDictionaries in this way.
Also it's coming from a firebase snapshot
example:
self.friendsDict = snapshot.value as! NSDictionary

Answer 1

try this -
let dict:NSMutableDictionary = [
"3gZ0qtk0yMUEvtSmz2RW40Y7AC83" : 12,
"USXhV0QYkpbSzAmXgfeteXHuoqg2" : 25,
"UTPFBV5Q5IgTh17060c6WxNDQCO2" : 1,
"fqsspZtskWVheqUQQtROepixsGB2" : 256
]
let sortedKeys2 = (dict as NSDictionary).keysSortedByValueUsingComparator
{
($1 as! NSNumber).compare($0 as! NSNumber)
}
OR
let dict = [
"3gZ0qtk0yMUEvtSmz2RW40Y7AC83" : 12,
"USXhV0QYkpbSzAmXgfeteXHuoqg2" : 25,
"UTPFBV5Q5IgTh17060c6WxNDQCO2" : 1,
"fqsspZtskWVheqUQQtROepixsGB2" : 256
]
var sortedKeys = Array(dict.keys).sort({dict[$0] > dict[$1]})

Answer 2

Since you said the solution from this link Swift sort dictionary by value didn't work, I am posting a working code on my side:
let dict:NSDictionary = [
"3gZ0qtk0yMUEvtSmz2RW40Y7AC83" : 12,
"USXhV0QYkpbSzAmXgfeteXHuoqg2" : 25,
"UTPFBV5Q5IgTh17060c6WxNDQCO2" : 1,
"fqsspZtskWVheqUQQtROepixsGB2" : 256
]
let d = dict as! [String:NSInteger]
for (k,v) in (Array(d).sort {$0.1 > $1.1}) {
print("\(k):\(v)")
}
Output:
fqsspZtskWVheqUQQtROepixsGB2:256
USXhV0QYkpbSzAmXgfeteXHuoqg2:25
3gZ0qtk0yMUEvtSmz2RW40Y7AC83:12
UTPFBV5Q5IgTh17060c6WxNDQCO2:1
Edit:
For above code to work, OP had to change:
self.friendsDict = snapshot.value as! NSDictionary
to:
self.friendsDict = snapshot.value as! [String:NSInteger]