代码如下:
static constNSInteger Max_Character_Num =4;
- (IBAction)onTextFieldEditingChanged:(id)sender { NSString *lang = [[UITextInputMode currentInputMode] primaryLanguage]; if ([lang isEqualToString:@"zh-Hans"]) { UITextRange *selectedRange = [self.tagNameTextField markedTextRange]; UITextPosition *position = [self.tagNameTextField positionFromPosition:selectedRange.start offset:0]; if (!position) { if (self.tagNameTextField.text.length > Max_Character_Num) { self.tagNameTextField.text = [self.tagNameTextField.text substringFrom:0 to:Max_Character_Num]; } } }else{ if (self.tagNameTextField.text.length > Max_Character_Num) { self.tagNameTextField.text = [self.tagNameTextField.text substringFrom:0 to:Max_Character_Num]; } } }来自:http://www.51sjk.com/Upload/Articles/1/0/323/323001_20220817162220853.jpg