textView表情过滤

-(void)textViewDidChange:(UITextView*)textView
{
NSRangetextRange = [textView selectedRange];
[textView setText:[self disable_emoji:[textView text]]];
[textView setSelectedRange:textRange];
}
- (NSString*)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];
NSString *modifiedString = [regex stringByReplacingMatchesInString:text
options:0
range:NSMakeRange(0, [textlength])
withTemplate:@""];
return modifiedString;
}
if ([[[UITextInputMode currentInputMode] primaryLanguage] isEqualToString:@"emoji"]) {
    return NO;
}