Use data source for getting search results.

TITokenField.h

@@ -40,6 +40,7 @@
 - (BOOL)tokenField:(TITokenField *)tokenField willRemoveToken:(TIToken *)token;
 - (void)tokenField:(TITokenField *)tokenField didRemoveToken:(TIToken *)token;
 
+- (void)tokenField:(TITokenField *)tokenField didChangeText:(NSString *)text;
 - (void)tokenField:(TITokenField *)tokenField didFinishSearch:(NSArray *)matches;
 - (NSString *)tokenField:(TITokenField *)tokenField displayStringForRepresentedObject:(id)object;
 - (NSString *)tokenField:(TITokenField *)tokenField searchResultStringForRepresentedObject:(id)object;
@@ -48,6 +49,10 @@
 - (CGFloat)tokenField:(TITokenField *)tokenField resultsTableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
 @end
 
+@protocol TITokenFieldDataSource <NSObject>
+- (NSArray *)tokenFieldSearchResults:(TITokenField *)tokenField;
+@end
+
 @interface TITokenFieldInternalDelegate : NSObject <UITextFieldDelegate>
 @end
 
@@ -66,6 +71,7 @@
 @property (weak, nonatomic, readonly) NSArray * tokenTitles;
 
 - (void)updateContentSize;
+- (void)reloadSearchResults;
 
 @end
 
@@ -79,6 +85,7 @@ typedef enum {
 
 @interface TITokenField : UITextField
 @property (nonatomic, weak) id <TITokenFieldDelegate> delegate;
+@property (nonatomic, weak) id <TITokenFieldDataSource> dataSource;
 @property (weak, nonatomic, readonly) NSArray * tokens;
 @property (weak, nonatomic, readonly) TIToken * selectedToken;
 @property (weak, nonatomic, readonly) NSArray * tokenTitles;

TITokenField.m

@@ -243,8 +243,16 @@ - (void)tokenFieldDidEndEditing:(TITokenField *)field {
 }
 
 - (void)tokenFieldTextDidChange:(TITokenField *)field {
-    [self resultsForSearchString:_tokenField.text];
-
+	if ([_tokenField.delegate respondsToSelector:@selector(tokenField:didChangeText:)]) {
+		[_tokenField.delegate tokenField:_tokenField didChangeText:_tokenField.text];
+	}
+
+	if (_tokenField.dataSource != nil) {
+		[self reloadSearchResults];
+		return;
+	}
+
+	[self resultsForSearchString:_tokenField.text];
     if (_forcePickSearchResult) [self setSearchResultsVisible:YES];
 	else [self setSearchResultsVisible:(_resultsArray.count > 0)];
 }
@@ -313,12 +321,12 @@ - (void)resultsForSearchString:(NSString *)searchString {
 	// If the source is massive, this could take some time.
 	// You could always subclass and override this if needed or do it on a background thread.
 	// GCD would be great for that.
-
+
+	searchString = [searchString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+
 	[_resultsArray removeAllObjects];
 	[_resultsTable reloadData];
-
-	searchString = [searchString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
-
+
 	if (searchString.length || _forcePickSearchResult){
 		[_sourceArray enumerateObjectsUsingBlock:^(id sourceObject, NSUInteger idx, BOOL *stop){
 
@@ -354,6 +362,19 @@ - (void)resultsForSearchString:(NSString *)searchString {
     }
 }
 
+- (void)reloadSearchResults {
+	if (_tokenField.dataSource != nil) {
+		NSArray *searchResults = [_tokenField.dataSource tokenFieldSearchResults:_tokenField];
+		_resultsArray = [NSMutableArray arrayWithArray:searchResults];
+	}
+	if (_forcePickSearchResult) {
+		[self setSearchResultsVisible:YES];
+	} else {
+		[self setSearchResultsVisible:(_resultsArray.count > 0)];
+	}
+	[_resultsTable reloadData];
+}
+
 - (void)presentpopoverAtTokenFieldCaretAnimated:(BOOL)animated {
 
     UITextPosition * position = [_tokenField positionFromPosition:_tokenField.beginningOfDocument offset:2];