[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

- (NSString *)hmacsha1:(NSString *)text key:(NSString *)secret { 
    NSData *secretData = [secret dataUsingEncoding:NSUTF8StringEncoding]; 
    NSData *clearTextData = [text dataUsingEncoding:NSUTF8StringEncoding]; 
    unsigned char result[20]; 
    CCHmac(kCCHmacAlgSHA1, [secretData bytes], [secretData length], [clearTextData bytes], [clearTextData length], result); 
     
    char base64Result[32]; 
    size_t theResultLength = 32; 
    Base64EncodeData(result, 20, base64Result, &theResultLength); 
    NSData *theData = [NSData dataWithBytes:base64Result length:theResultLength]; 
     
    NSString *base64EncodedResult = [[NSString alloc] initWithData:theData encoding:NSASCIIStringEncoding]; 
     
    return base64EncodedResult; 
}