iOS 过滤emoji表情

//
//  ViewController.m
//  test
//
//  Created by 郭宇 on 13-11-15.
//  Copyright (c) 2013年 郭 宇. All rights reserved.
//

#import "ViewController.h"

@implementation ViewController
{
IBOutlet UITextView *textinput;
}

- (void)viewDidLoad
{
[super viewDidLoad];
[textinput setDelegate:self];
}

- (void)textViewDidChange:(UITextView *)textView
{
NSRange textRange = [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, [text length])
withTemplate:@""];
return modifiedString;
}

@end