Problem with sorting NSDictionary
- by Stas Dmitrenko
Hello. I need to sort a NSDictionary of dictionaries. It looks like:
{//dictionary
RU = "110.1"; //key and value
SG = "150.2"; //key and value
US = "50.3"; //key and value
}
Result need to be like:
{//dictionary
SG = "150.2"; //key and value
RU = "110.1"; //key and value
US = "50.3"; //key and value
}
I am trying this:
@implementation NSMutableDictionary (sorting)
-(NSMutableDictionary*)sortDictionary
{
NSArray *allKeys = [self allKeys];
NSMutableArray *allValues = [NSMutableArray array];
NSMutableArray *sortValues= [NSMutableArray array];
NSMutableArray *sortKeys= [NSMutableArray array];
for(int i=0;i<[[self allValues] count];i++)
{
[allValues addObject:[NSNumber numberWithFloat:[[[self allValues] objectAtIndex:i] floatValue]]];
}
[sortValues addObjectsFromArray:allValues];
[sortKeys addObjectsFromArray:[self allKeys]];
[sortValues sortUsingDescriptors:[NSArray arrayWithObject:[[[NSSortDescriptor alloc] initWithKey:@"floatValue" ascending:NO] autorelease]]];
for(int i=0;i<[sortValues count];i++)
{
[sortKeys replaceObjectAtIndex:i withObject:[allKeys objectAtIndex:[allValues indexOfObject:[sortValues objectAtIndex:i]]]];
[allValues replaceObjectAtIndex:[allValues indexOfObject:[sortValues objectAtIndex:i]] withObject:[NSNull null]];
}
NSLog(@"%@", sortKeys);
NSLog(@"%@", sortValues);
NSLog(@"%@", [NSMutableDictionary dictionaryWithObjects:sortValues forKeys:sortKeys]);
return [NSMutableDictionary dictionaryWithObjects:sortValues forKeys:sortKeys];
}
@end
This is the result of NSLog:
1)
{
SG,
RU,
US
}
2)
{
150.2,
110.1,
50.3
}
3)
{
RU = "110.1";
SG = "150.2";
US = "50.3";
}
Why is this happening? Can you help me with this problem?
