---
title: kCFURLErrorFailingURLStringErrorKey
framework: cfnetwork
role: symbol
role_heading: Global Variable
path: cfnetwork/kcfurlerrorfailingurlstringerrorkey
---

# kCFURLErrorFailingURLStringErrorKey

The URL that caused the load to fail as a CFStringRef object.

## Declaration

```swift
let kCFURLErrorFailingURLStringErrorKey: CFString
```

## See Also

### Constants

- [kCFURLErrorFailingURLErrorKey](cfnetwork/kcfurlerrorfailingurlerrorkey.md)
- [kCFGetAddrInfoFailureKey](cfnetwork/kcfgetaddrinfofailurekey.md)
- [kCFSOCKSStatusCodeKey](cfnetwork/kcfsocksstatuscodekey.md)
- [kCFSOCKSVersionKey](cfnetwork/kcfsocksversionkey.md)
- [kCFSOCKSNegotiationMethodKey](cfnetwork/kcfsocksnegotiationmethodkey.md)
- [kCFDNSServiceFailureKey](cfnetwork/kcfdnsservicefailurekey.md)
- [kCFFTPStatusCodeKey](cfnetwork/kcfftpstatuscodekey.md)