sha256 hash objective-c ios xcode

AppDelegate.m

-(NSString*)sha256HashFor:(NSString*)input
{
    const char* str = [input UTF8String];
    unsigned char result[CC_SHA256_DIGEST_LENGTH];
    CC_SHA256(str, (CC_LONG)strlen(str), result);
    
    NSMutableString *ret = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH*2];
    for(int i = 0; i<CC_SHA256_DIGEST_LENGTH; i++)
    {
        [ret appendFormat:@"%02x",result[i]];
    }
    return ret;
}

Hope you don't mind, I reposted this here: https://stackoverflow.com/a/60856103/8047

Thank you!

Wow this is clutch, thanks a bunch!