how to sort an array by integer - iphone

Question

i am trying to sort my score board but the score board is sorted by name but i want sort it by score i.e (high to low) score plese help to solve this.i stored the playername and score details in one label.
please help me
thanks in advance
asd 45
asd 66
rrr 55
tes 42
i want to show like
asd 66
rrr 55
asd 45
tes 42
-(void)btnSaveScore
{
if(!dictWinData)
dictWinData = [[NSMutableDictionary alloc] init];
array = [[NSMutableArray alloc] init];
array = [[[NSUserDefaults standardUserDefaults] valueForKey:#"ScoreName"] mutableCopy];
if([array count] == 0)
{
array = [[NSMutableArray alloc] init];
}
NSString *strName = [NSString stringWithFormat:#"%#",strNameOFPlayer];
NSString *strScore = [NSString stringWithFormat:#"%#",[NSString stringWithFormat:#"%d",iTap]];
int intScore = iTap;
NSLog(#"iTap data is:--> %d",intScore);
if([strNameOFPlayer length]==7)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
else if ([strNameOFPlayer length] == 6)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
else if ([strNameOFPlayer length] == 5)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
else if ([strNameOFPlayer length] == 4)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
else if ([strNameOFPlayer length] == 3)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
else if ([strNameOFPlayer length] == 2)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
else if ([strNameOFPlayer length] == 1)
[array addObject:[NSString stringWithFormat:#"%# %#",strName,strScore]];
NSSortDescriptor *sorter = [[NSSortDescriptor alloc] initWithKey:#"self" ascending:YES];
NSArray *sorters = [[NSArray alloc] initWithObjects:sorter, nil];
[sorter release];
NSArray *sortedArray = [array sortedArrayUsingDescriptors:sorters];
[sorters release];
NSUserDefaults *dfltsData = [NSUserDefaults standardUserDefaults];
[dfltsData setObject:sortedArray forKey:#"ScoreName"];
// [dfltsData setObject:array forKey:#"ScoreCard"];
[dfltsData synchronize];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Alert"
message:#"Score is saved."
delegate:self
cancelButtonTitle:#"Ok"
otherButtonTitles:nil, nil];
[alert show];
[alert release];
}

Answer 1

Here you are adding the string (containing name and score) to the array. Instead, create a model class with the name (NSString*) and score (NSNumber*) members and add them to the array.
For sorting,
NSArray *sortedArray = [yourUnsortedArray sortedArrayUsingComparator: ^(id obj1, id obj2) {
if ([[obj1 score] integerValue] > [[obj2 score] integerValue]) {
return NSOrderedDescending;
}
if ([[obj1 score] integerValue] < [[obj2 score] integerValue]) {
return NSOrderedAscending;
}
return NSOrderedSame;
}];