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https://github.com/fabiocaccamo/FCUUID
:iphone: :id: iOS UUID / Universally Unique Identifiers library as alternative to UDID and identifierForVendor.
https://github.com/fabiocaccamo/FCUUID
device device-uuid icloud identifierforvendor installation ios keychain objective-c persistence pod session udid uickeychainstore unique-identifier uuid uuids vendor
Last synced: 37 minutes ago
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:iphone: :id: iOS UUID / Universally Unique Identifiers library as alternative to UDID and identifierForVendor.
- Host: GitHub
- URL: https://github.com/fabiocaccamo/FCUUID
- Owner: fabiocaccamo
- License: mit
- Created: 2014-10-06T12:15:00.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2022-12-13T14:24:53.000Z (over 1 year ago)
- Last Synced: 2024-05-18T16:01:23.569Z (about 1 month ago)
- Topics: device, device-uuid, icloud, identifierforvendor, installation, ios, keychain, objective-c, persistence, pod, session, udid, uickeychainstore, unique-identifier, uuid, uuids, vendor
- Language: Objective-C
- Homepage:
- Size: 62.5 KB
- Stars: 1,592
- Watchers: 56
- Forks: 221
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Lists
- awesome-rank-1000 - FCUUID
README
FCUUID   
===================
iOS **UUID** library as alternative to the old good **UDID** and **identifierForVendor**.
This library provides the simplest API to obtain **universally unique identifiers with different levels of [persistence](#persistence)**.
It's possible to retrieve the **UUIDs created for all devices of the same user**, in this way with a little bit of server-side help **it's possible manage guest accounts across multiple devices easily.**
## Requirements & dependencies
- iOS >= 5.0
- ARC enabled
- Key-value storage enabled *(target / Capabilities / iCloud / Key-value storage)*
- Security.framework
- [UICKeyChainStore](https://github.com/kishikawakatsumi/UICKeyChainStore)
- ***(optional)*** - Key-value storage enabled -> Target / Capabilities / iCloud / Key-value storage enabled if you want to **share** `uuidsOfUserDevices` values **across multiple devices using the same iCloud account**.
- ***(optional)*** - KeyChain sharing enabled (entitlements and provisioning profile) if you need to **share** the same `uuidForDevice` / `uuidsOfUserDevices` values **across multiple apps with the same bundle seed**.
## Installation
#### CocoaPods:
`pod 'FCUUID'`
#### [Swift Package Manager](https://github.com/apple/swift-package-manager):
1. File > Swift Packages > Add Package Dependency
2. Add https://github.com/fabiocaccamo/FCUUID
3. Select "Up to Next Major" with "1.0.0"
#### [Carthage](https://github.com/Carthage/Carthage):
```ogdl
github "fabiocaccamo/FCUUID"
```
#### Manual install:
- Copy `FCUUID` folder to your project.
- Manual install [UICKeyChainStore](https://github.com/kishikawakatsumi/UICKeyChainStore)
### Optional setup:
It is recommended to do the setup in `applicationDidFinishLaunchingWithOptions` method.
- Add an observer to the `FCUUIDsOfUserDevicesDidChangeNotification` to be notified about uuids of user devices changes.
- If necessary, **migrate from a previously used UUID or UDID** using one of the migrations methods listed in the API section (it's recommended to do migration before calling `uuidForDevice` or `uuidsForUserDevices` methods). Keep in mind that **migration works only if the existing value is a valid uuid and `uuidForDevice` has not been created yet**.
- Call any class method to enforce iCloud sync.
## API
**Get different UUIDs** (each one with its own persistency level)
```objective-c
//changes each time (no persistent)
+(NSString *)uuid;
//changes each time (no persistent), but allows to keep in memory more temporary uuids
+(NSString *)uuidForKey:(id)key;
//changes each time the app gets launched (persistent to session)
+(NSString *)uuidForSession;
//changes each time the app gets installed (persistent to installation)
+(NSString *)uuidForInstallation;
//changes each time all the apps of the same vendor are uninstalled (this works exactly as identifierForVendor)
+(NSString *)uuidForVendor;
//changes only on system reset, this is the best replacement to the good old udid (persistent to device)
+(NSString *)uuidForDevice;
//or
#import "UIDevice+FCUUID.h"
[[UIDevice currentDevice] uuid];
```
**Get the list of UUIDs of user devices**
```objective-c
//returns the list of all uuidForDevice of the same user, in this way it's possible manage guest accounts across multiple devices easily
+(NSArray *)uuidsOfUserDevices;
```
**Migrate from a previously stored UUID / UDID**
Before migrating an existing value it's recommended to **debug it** by simply passing `commitMigration:NO` and logging the returned value.
When you will be ready for committing the migration, use `commitMigration:YES`.
After the migration, any future call to `uuidForDevice` will return the migrated value.
```objective-c
//these methods search for an existing UUID / UDID stored in the KeyChain or in UserDefaults for the given key / service / access-group
+(NSString *)uuidForDeviceMigratingValue:(NSString *)value commitMigration:(BOOL)commitMigration;
+(NSString *)uuidForDeviceMigratingValueForKey:(NSString *)key commitMigration:(BOOL)commitMigration;
+(NSString *)uuidForDeviceMigratingValueForKey:(NSString *)key service:(NSString *)service commitMigration:(BOOL)commitMigration;
+(NSString *)uuidForDeviceMigratingValueForKey:(NSString *)key service:(NSString *)service accessGroup:(NSString *)accessGroup commitMigration:(BOOL)commitMigration;
```
**Check if value is a valid UUID**
```objective-c
+(BOOL)uuidValueIsValid:(NSString *)uuidValue;
```
## Persistence
- **`√`** *yes*
- `-` *no*
- **`*`** *read notes below*
| PERSISTS | App memory | App relaunch | Reset Advertising Identifier | App reinstall | System reboot | System upgrade | System reset |
|-----------------------|:----------:|:------------:|:----------------------------:|:-------------:|:-------------:|:--------------:|:------------:|
| `uuid` | - | - | - | - | - | - | - |
| `uuidForKey:key` | **√** | - | - | - | - | - | - |
| `uuidForSession` | **√** | - | - | - | - | - | - |
| `uuidForInstallation` | **√** | **√** | **√** | - | **√** | - | - |
| `uuidForVendor` | **√** | **√** | - | **√*** | **√** | - | - |
| `uuidForDevice` | **√** | **√** | **√** | **√** | **√** | **√** | **√**** |
**(persists only if the user have not uninstalled all apps of the same vendor)*
***(persists only if the user restores a device backup which includes also keychain's data)*
## FAQ
#### How can I share the device uuid between two apps?
You must have **KeyChain sharing enabled** (entitlements and provisioning profile) and your apps identifiers must have the same bundle seed.
#### What happens if I call `uuidForDevice` on 2 different devices using same iCloud account and iCloud Keychain?
You will obtain 2 **different uuid(s)**, and if you call `uuidsOfUserDevices` you will obtain a list containing the uuids of both devices.
#### When I reboot / upgrade / reset my device system, will device uuid change?
Please check the **persistence** table above.
## Support development
[](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=fabio%2ecaccamo%40gmail%2ecom&lc=IT&item_name=Fabio%20Caccamo%20%2d%20Open%20Source%20Projects&item_number=FCUUID¤cy_code=EUR&bn=PP%2dDonationsBF%3abtn_donate_LG%2egif%3aNonHosted)
## License
Released under [MIT License](LICENSE).