textView输入中文时和高亮英文输入法时的字数统计

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewEditChanged:) name:@"UITextViewTextDidChangeNotification" object:_textView];

- (void)textViewEditChanged:(NSNotification *)obj{

UITextView *textField = (UITextView *)obj.object;

NSLog(@"========%@",textField.text);

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 > 10) {
textField.text = [toBeString substringToIndex:10];

[[[UIAlertView alloc] initWithTitle:@"dsfsa" message:@"msg" delegate:self cancelButtonTitle:nil otherButtonTitles:@"SURE", nil] show];

[self.textView resignFirstResponder];
}
}
// 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 > 10) {
textField.text = [toBeString substringToIndex:10];

[[[UIAlertView alloc] initWithTitle:@"dsfsa" message:@"msg" delegate:self cancelButtonTitle:nil otherButtonTitles:@"SURE", nil] show];
}
}

}

- (void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"UITextViewTextDidChangeNotification" object:_textView];
}