iOS判断输入的是否是纯汉字

#pragma mark 输入中文

- (BOOL) deptNameInputShouldChinese

{

    NSString *regex = @"[\u4e00-\u9fa5]+";

    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];

    if (![pred evaluateWithObject:inputTextField.text]) {

        return YES;

    }

    return NO;

}

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
    
    //中文字符集
    NSString *regex = @"[\u4e00-\u9fa5]+";
    
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    
    if ([pred evaluateWithObject:text] || [text isEqualToString:@""]) {
        NSLog(@"输入的是中文字符和回退符号");
        return YES;
    }
    if ([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];
        return NO;
    }
    return NO;
}