有效的禁止文本输入框输入表情

#import "ViewController.h"

 

@implementationViewController

{

    IBOutletUITextView *textinput;

}

 

- (void)viewDidLoad

{

    [superviewDidLoad];

    [textinputsetDelegate:self];

}

 

- (void)textViewDidChange:(UITextView*)textView

{

    NSRangetextRange = [textView selectedRange];

    [textViewsetText:[selfdisable_emoji:[textViewtext]]];

    [textViewsetSelectedRange:textRange];

}

 

- (NSString*)disable_emoji:(NSString*)text

{

    NSRegularExpression*regex = [NSRegularExpressionregularExpressionWithPattern:@"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]"options:NSRegularExpressionCaseInsensitiveerror:nil];

    NSString*modifiedString = [regex stringByReplacingMatchesInString:text

                                                              options:0

                                                                range:NSMakeRange(0, [textlength])

                                                         withTemplate:@""];

    returnmodifiedString;

}

 

//文本输入框禁止方法
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string{
    
    if ([[[UITextInputMode currentInputMode] primaryLanguage] isEqualToString:@"emoji"]) {
        return NO;
    }
    return YES;
    
}

@end