Merge pull request #8 from ShannonChenCHN/master

[FIX] Emojis get torn apart at the last limited index（Objective-C only）
tingxins · Dec 3, 2017 · 3c534de · 3c534de
2 parents 9157cd8 + a47a686
commit 3c534de
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/InputKit/TXLimitedTextField.m b/InputKit/TXLimitedTextField.m
@@ -129,7 +129,10 @@ - (void)textFieldTextDidChangeNotification:(NSNotification *)notification {
     if (!position) {
         BOOL flag = NO;
         if (currentText.length > maxLength) {
-            textField.text = [currentText substringToIndex:maxLength];
+            // Use the rangeOfComposedCharacterSequenceAtIndex: method
+            // to make sure that Unicode characters, like emojis, don’t get torn apart.
+            NSRange range = [currentText rangeOfComposedCharacterSequenceAtIndex:maxLength];
+            textField.text = [currentText substringToIndex:range.location];
             flag = YES;
         }