---
title: Legacy URL Loading Systems
framework: foundation
role: collectionGroup
role_heading: API Collection
path: foundation/legacy-url-loading-systems
---

# Legacy URL Loading Systems

Migrate your code away from using these legacy objects.

## Topics

### URL Connection

- [NSURLConnection](foundation/nsurlconnection.md)
- [NSURLConnectionDelegate](foundation/nsurlconnectiondelegate.md)
- [NSURLConnectionDataDelegate](foundation/nsurlconnectiondatadelegate.md)
- [NSURLConnectionDownloadDelegate](foundation/nsurlconnectiondownloaddelegate.md)

### URL Download

- [NSURLDownload](foundation/nsurldownload.md)
- [NSURLDownloadDelegate](foundation/nsurldownloaddelegate.md)

### URL Handle

- [NSURLHandle](foundation/nsurlhandle.md)

### URL Authentication Challenge Sender

- [URLAuthenticationChallengeSender](foundation/urlauthenticationchallengesender.md)