I have a class Events
@interface MeEvents : NSObject {
NSString* name;**strong text**
NSString* location;
}
@property(nonatomic,retain)NSString* name;strong text
@property(nonatomic,retain)NSString* location;
In my NSMutablArray I add object of Events
Events* meEvent;
[tempArray addObject:meEvent];
Please tell me how to sort this array by member name.
NSSortDescriptor *sortDes = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:NO];
[tempArray_ sortUsingDescriptors:[NSArray arrayWithObject:sortDes]];
[sortDes release];
Declare this at the top of the implementation file above @interface line
NSComparisonResult sortByName(id firstItem, id secondItem, void *context);
Following is the implementation for the method
NSComparisonResult sortByName(id item1, id item2, void *context)
{
NSString *strItem1Name = [item1 name];
NSString *strItem2Name = [item2 name];
return [strItem1Name compare:strItem2Name]; //Ascending for strItem1Name you can reverse comparison for having descending result
}
This is how you would call it
[tempArray sortUsingFunction:sortByName context:@"Names"];
The easiest way is to use sortUsingComparator:
like this:
[tempArray sortUsingComparator:^(id a, id b) {
return [[a name] compare:[b name]];
}];
If you are sorting these strings because you want to show a sorted list to the user, you should localizedCompare:
instead:
[tempArray sortUsingComparator:^(id a, id b) {
return [[a name] localizedCompare:[b name]];
}];
Or you might want to use localizedCaseInsensitiveCompare:
.
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