I have an array of objects. On this object is a NSDecimalNumber property distanceFromDevice.
I want to order this array by this property. I have struggled for hours with sorting, anyone got any advice?
- (void)buildSearchableListUsing:(CLLocation *)newLocation
{
listContent = [[NSMutableArray alloc] init];
for(NSAirport *regionalAirport in airportsList)
{
CLLocation *location = [[CLLocation alloc]initWithLatitude:[regionalAirport.latitude doubleValue] longitude:[regionalAirport.longitude doubleValue]];
regionalAirport.distanceFromDevice = [[NSDecimalNumber alloc]initWithDouble:[newLocation distanceFromLocation:location]];
NSLog(@"distanceFromDevice %@", regionalAirport.distanceFromDevice);
[listContent addObject:regionalAirport];
}
//I want listContent ordered by the property distanceFromDevice
}
Try this:
listContent = [[NSMutableArray alloc] init];
NSMutableArray *sortArray = [NSMutableArray array];
for(NSAirport *regionalAirport in airportsList)
{
CLLocation *location = [[CLLocation alloc]initWithLatitude:[regionalAirport.latitude doubleValue] longitude:[regionalAirport.longitude doubleValue]];
regionalAirport.distanceFromDevice = [[NSDecimalNumber alloc]initWithDouble:[newLocation distanceFromLocation:location]];
NSLog(@"distanceFromDevice %@", regionalAirport.distanceFromDevice);
//[listContent addObject:regionalAirport];
[sortArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:regionalAirport,@"arrayElement",regionalAirport.distanceFromDevice,@"elementSorter",nil];
}
[sortArray sortUsingDescriptors:[NSArray arrayWithObject:[[[NSSortDescriptor alloc] initWithKey:@"elementSorter" ascending:NO] autorelease]]];
for(NSDictionary *dictionary in sortArray)
{
[listContent addObject:[dictionary valueForKey:@"arrayElement"]];
}
U can sort an NSArray in ascending manner in this way...
NSSortDescriptor *sortDescriptor;
sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:nil
ascending:YES] autorelease];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
NSArray *sortedArray;
sortedArray = [myArrray sortedArrayUsingDescriptors:sortDescriptors];
NSLog(@"sortedArray%@",sortedArray);
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