emoji编码在android或者pc设备没有很好的支持，所以有时候为了禁止emoji表情的输入，因为关闭不了系统emoji的键盘，那只能根据编码把emoji表情过滤掉，写了一个NSString的拓展，用来判断是不是emoji编码： @implementation NSString(Emoji) +(BOOL)isContainsEmoji:(NSString *)string { __block BOOL isEomji = NO; [string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequencesusingBlock: ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) { const unichar hs = [substring characterAtIndex:0]; // surrogate pair if (0xd800 <= hs && hs <= 0xdbff) { if (substring.length > 1) { const unichar ls = [substring characterAtIndex:1]; const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000; if (0x1d000 <= uc && uc <= 0x1f77f) { isEomji = YES; } } } else if (substring.length > 1) { const unichar ls = [substring characterAtIndex:1]; if (ls == 0x20e3) { isEomji = YES; } } else { // non surrogate if (0x2100 <= hs && hs <= 0x27ff && hs != 0x263b) { isEomji = YES; } else if (0x2B05 <= hs && hs <= 0x2b07) { isEomji = YES; } else if (0x2934 <= hs && hs <= 0x2935) { isEomji = YES; } else if (0x3297 <= hs && hs <= 0x3299) { isEomji = YES; } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50|| hs == 0x231a ) { isEomji = YES; } } }]; return isEomji; } 这样在textview或textfield的delegate判断一下，即可禁止输入emoji，如下： - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { //emoji无效 if([NSString isContainsEmoji:string]) { return NO; } } 本文来源：https://www.wddqw.com/doc/c578b27ce009581b6bd9ebd3.html