项目有需求需要判定字符串中是否包含表情包，于是百度，google啥手段都用尽了，试了一个又一个的方法，最后发现下面这段代码靠谱点
- (BOOL)stringContainsEmoji:(NSString *)string{
__block BOOL returnValue = NO;
[string enumerateSubstringsInRange:NSMakeRange(0, [string length])
options:NSStringEnumerationByComposedCharacterSequences
usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
const unichar hs = [substring characterAtIndex:0];
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) {
returnValue = YES;
NSLog(@"%@",substring);
[self changeToString:substring];
}
}
} else if (substring.length > 1) {
const unichar ls = [substring characterAtIndex:1];
if (ls == 0x20e3) {
returnValue = YES;
}
} else {
if (0x2100 <= hs && hs <= 0x27ff) {
returnValue = YES;
} else if (0x2B05 <= hs && hs <= 0x2b07) {
returnValue = YES;
} else if (0x2934 <= hs && hs <= 0x2935) {
returnValue = YES;
} else if (0x3297 <= hs && hs <= 0x3299) {
returnValue = YES;
} else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {
returnValue = YES;
}
}
}];
return returnValue;
}
然后美滋滋的去实验，结果发现很多新出的emoji都不能识别出来，估摸着是emoji判定的范围的不对。就想着更新最新的emoji的unicode码范围。
用control+command+空格弹出字符检视器，就能看到系统自带的emoji，但是现在还看不到emoji的unicode码。点击左上角的设置图标
截屏2020-06-04 下午4.50.23.png
选择自定列表，然后一直往下拉，勾选代码表里的Unicode
截屏2020-06-04 下午4.51.56.png
完成后，返回再点击随意一个emoji表情，在右侧就有该emoji的unicode码了。
截屏2020-06-04 下午4.53.04.png
再然后就是茫茫多的去比对unicode值了。最后更新最后的结果代码
- (BOOL)isContainEmoji {
__block BOOL containsEmoji = NO;
[self enumerateSubstringsInRange:NSMakeRange(0,[self length])
options:NSStringEnumerationByComposedCharacterSequences
usingBlock:^(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 <= 0x1FAD6) {
containsEmoji = YES;
}
}
}else if (substring.length > 1) {
const unichar ls = [substring characterAtIndex:1];
if (ls == 0x20e3 ||
ls == 0xfe0f ||
ls == 0xd83c) {
containsEmoji = YES;
}
} else {
// non surrogate
if (0x2100 <= hs && hs <= 0x27ff) {
containsEmoji = YES;
if (0x278b <= hs && hs <= 0x2792) {
containsEmoji = NO;
}
}else if (0x2B05 <= hs && hs <= 0x2b07) {
containsEmoji = YES;
} else if (0x2934 <= hs && hs <= 0x2935) {
containsEmoji = YES;
}else if (0x3297 <= hs && hs <= 0x3299) {
containsEmoji = YES;
}else if (hs == 0xa9 ||
hs == 0xae ||
hs == 0x303d ||
hs == 0x3030 ||
hs == 0x2b55 ||
hs == 0x2b1c ||
hs == 0x2b1b ||
hs == 0x2b50) {
containsEmoji = YES;
}
}
if (containsEmoji) {
*stop = YES;
}
}];
return containsEmoji;
}
更新至iOS14.2 emoji 13.0
如有问题，请提出指教
