禁止键盘输入表情

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
//    [self disable_emoji:string];
    return [self disable_emoji:string];
}

- (BOOL)disable_emoji:(NSString *)text
{
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]" options:NSRegularExpressionCaseInsensitive error:nil];
    
    NSArray *matches = [regex matchesInString:text options:kNilOptions range:NSMakeRange(0, text.length)];
    
    if (matches.count > 0) {
        return NO;
    }
    return YES;

}