NSSearchField continuously calls method

I have created an `NSSearchField` that stores a list of recent searches. The search field is connected to a method that updates a label in the window with the text typed into the search field. The problem is that the label updates as soon as the user types into the search field, I need the label to not update until after the user types the text then hits the Enter key. I can do this with the typical `NSTextField` but I want to use the `NSSearchField` so I can show recent searches. Please see my code below and offer some suggestions. Thanks. Interface file: ``` #import <Cocoa/Cocoa.h> @interface AppDelegate : NSObject <NSApplicationDelegate> @property (assign) IBOutlet NSWindow *window; @property (weak) IBOutlet NSSearchField *searchField; @property (weak) IBOutlet NSTextField *textField; - (IBAction)searchString:(id)sender; @end ``` Implementation file: ``` #import "AppDelegate.h" @implementation AppDelegate @synthesize window = _window; @synthesize searchField, textField; - (void)awakeFromNib { if ( [searchField respondsToSelector:@selector(setRecentSearches:)] ) { NSMenu *searchMenu = [[NSMenu alloc] initWithTitle:@"Search Menu"]; [searchMenu setAutoenablesItems:YES]; NSMenuItem *recentsTitleItem = [[NSMenuItem alloc] initWithTitle:@"Recent Searches" action:nil keyEquivalent:@""]; [recentsTitleItem setTag:NSSearchFieldRecentsTitleMenuItemTag]; [searchMenu insertItem:recentsTitleItem atIndex:0]; NSMenuItem *norecentsTitleItem = [[NSMenuItem alloc] initWithTitle:@"No recent searches" action:nil keyEquivalent:@""]; [norecentsTitleItem setTag:NSSearchFieldNoRecentsMenuItemTag]; [searchMenu insertItem:norecentsTitleItem atIndex:1]; NSMenuItem *recentsItem = [[NSMenuItem alloc] initWithTitle:@"Recents" action:nil keyEquivalent:@""]; [recentsItem setTag:NSSearchFieldRecentsMenuItemTag]; [searchMenu insertItem:recentsItem atIndex:2]; NSMenuItem *separatorItem = (NSMenuItem*)[NSMenuItem separatorItem]; [separatorItem setTag:NSSearchFieldRecentsTitleMenuItemTag]; [searchMenu insertItem:separatorItem atIndex:3]; NSMenuItem *clearItem = [[NSMenuItem alloc] initWithTitle:@"Clear" action:nil keyEquivalent:@""]; [clearItem setTag:NSSearchFieldClearRecentsMenuItemTag]; [searchMenu insertItem:clearItem atIndex:4]; id searchCell = [searchField cell]; [searchCell setMaximumRecents:20]; [searchCell setSearchMenuTemplate:searchMenu]; } } - (IBAction)searchString:(id)sender { [textField setStringValue:[searchField stringValue]]; } @end ```