如何得到中英文混合下的NSString的长度?

方法一:

• (int)getStringLength:(NSString*)strtemp
  {

  NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

  NSData* da = [strtemp dataUsingEncoding:enc];

  return [da length];

}

方法二:

• (int)convertToInt:(NSString*)strtemp

{

int strlength = 0;

char* p = (char*)[strtemp cStringUsingEncoding:NSUnicodeStringEncoding];

for (int i=0 ; i<[strtemp lengthOfBytesUsingEncoding:NSUnicodeStringEncoding] ;i++) {

    if (*p) {

        p++;

        strlength++;

    }

    else {
        
        p++;
        
    }
    
    
    
}

return strlength;

}