-(void)textFiledEditChanged:(NSNotification *)obj{
UITextField *textField = (UITextField *)obj.object;
NSString *toBeString = textField.text;
NSString *lang = [[UITextInputMode currentInputMode] primaryLanguage]; // 键盘输入模式
if
([lang isEqualToString:@"zh-Hans"]) { //
简体中文输入，包括简体拼音，健体五笔，简体手写
UITextRange *selectedRange = [textField markedTextRange];
//获取高亮部分
UITextPosition *position = [textField positionFromPosition:selectedRange.start
offset:0];
//
没有高亮选择的字，则对已输入的文字进行字数统计和限制
if
(!position) {
if
(toBeString.length > kMaxLength) {
textField.text = [toBeString substringToIndex:kMaxLength];
}
}
//
有高亮选择的字符串，则暂不对文字进行统计和限制
else{
}
}
//
中文输入法以外的直接对其统计限制即可，不考虑其他语种情况
else{
if
(toBeString.length > kMaxLength) {
textField.text
= [toBeString substringToIndex:kMaxLength];
}
}
}
-(void)dealloc{
[[NSNotificationCenter
defaultCenter]removeObserver:self
name:@"UITextFieldTextDidChangeNotification"
object:_albumNameTextField];
}
iOS textfield输入长度限制汉字无效
原文：http://www.cnblogs.com/jzlblog/p/4397451.html
