禁止输入表情符号

 

#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