How to create a GUID UUID using iOS

Question

I want to be able to create a GUID UUID on the iPhone and iPad    The intention is to be able to create keys for distributed data that are all unique  Is there a way to do this with the iOS SDK

User · Answer

I ve uploaded my simple but fast implementation of a Guid class for ObjC here  obj-c GUID  Guid  guid    Guid randomGuid   NSLog       guid description     It can parse to and from various string formats as well

User · Answer

In iOS 6 you can easily use   NSUUID   UUID    NSUUID UUID   NSString  stringUUID    UUID UUIDString     More details in Apple s Documentations

User · Answer

The simplest technique is to use NSString  uuid     NSProcessInfo processInfo  globallyUniqueString   See the NSProcessInfo class reference

User · Answer

Reviewing the Apple Developer documentation I found the CFUUID object is available on the iPhone OS 2 0 and later

User · Answer

Reviewing the Apple Developer documentation I found the CFUUID object is available on the iPhone OS 2 0 and later

User · Answer

Reviewing the Apple Developer documentation I found the CFUUID object is available on the iPhone OS 2 0 and later

User · Answer

In iOS 6 you can easily use   NSUUID   UUID    NSUUID UUID   NSString  stringUUID    UUID UUIDString     More details in Apple s Documentations

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UIDevice currentDevice  uniqueIdentifier    Returns the Unique ID of your iPhone      EDIT  - UIDevice uniqueIdentifier  is now deprecated and apps are being rejected from the App Store for using it  The method below is now the preferred approach    If you need to create several UUID  just use this method  with ARC       NSString   GetUUID     CFUUIDRef theUUID   CFUUIDCreate NULL     CFStringRef string   CFUUIDCreateString NULL  theUUID     CFRelease theUUID     return    bridge NSString   string      EDIT  Jan  29 2014  If you re targeting iOS 6 or later  you can now use the much simpler method   NSString  UUID     NSUUID UUID  UUIDString

User · Answer

In Swift 3 0  var uuid   UUID   uuidString

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Reviewing the Apple Developer documentation I found the CFUUID object is available on the iPhone OS 2 0 and later

User · Answer

In Swift   var uuid  String   NSUUID   UUIDString println  uuid    uuid

User · Answer

In Swift 3 0  var uuid   UUID   uuidString

User · Answer

UIDevice currentDevice  uniqueIdentifier    Returns the Unique ID of your iPhone      EDIT  - UIDevice uniqueIdentifier  is now deprecated and apps are being rejected from the App Store for using it  The method below is now the preferred approach    If you need to create several UUID  just use this method  with ARC       NSString   GetUUID     CFUUIDRef theUUID   CFUUIDCreate NULL     CFStringRef string   CFUUIDCreateString NULL  theUUID     CFRelease theUUID     return    bridge NSString   string      EDIT  Jan  29 2014  If you re targeting iOS 6 or later  you can now use the much simpler method   NSString  UUID     NSUUID UUID  UUIDString

User · Answer

The simplest technique is to use NSString  uuid     NSProcessInfo processInfo  globallyUniqueString   See the NSProcessInfo class reference

User · Answer

UIDevice currentDevice  uniqueIdentifier    Returns the Unique ID of your iPhone      EDIT  - UIDevice uniqueIdentifier  is now deprecated and apps are being rejected from the App Store for using it  The method below is now the preferred approach    If you need to create several UUID  just use this method  with ARC       NSString   GetUUID     CFUUIDRef theUUID   CFUUIDCreate NULL     CFStringRef string   CFUUIDCreateString NULL  theUUID     CFRelease theUUID     return    bridge NSString   string      EDIT  Jan  29 2014  If you re targeting iOS 6 or later  you can now use the much simpler method   NSString  UUID     NSUUID UUID  UUIDString

User · Answer

I ve uploaded my simple but fast implementation of a Guid class for ObjC here  obj-c GUID  Guid  guid    Guid randomGuid   NSLog       guid description     It can parse to and from various string formats as well

User · Answer

In Swift   var uuid  String   NSUUID   UUIDString println  uuid    uuid

User · Answer

UIDevice currentDevice  uniqueIdentifier    Returns the Unique ID of your iPhone      EDIT  - UIDevice uniqueIdentifier  is now deprecated and apps are being rejected from the App Store for using it  The method below is now the preferred approach    If you need to create several UUID  just use this method  with ARC       NSString   GetUUID     CFUUIDRef theUUID   CFUUIDCreate NULL     CFStringRef string   CFUUIDCreateString NULL  theUUID     CFRelease theUUID     return    bridge NSString   string      EDIT  Jan  29 2014  If you re targeting iOS 6 or later  you can now use the much simpler method   NSString  UUID     NSUUID UUID  UUIDString

User · Answer

Here is the simple code I am using  compliant with ARC     NSString   getUUID       CFUUIDRef newUniqueId   CFUUIDCreate kCFAllocatorDefault       NSString   uuidString      bridge transfer NSString  CFUUIDCreateString kCFAllocatorDefault  newUniqueId       CFRelease newUniqueId        return uuidString

User · Answer

Here is the simple code I am using  compliant with ARC     NSString   getUUID       CFUUIDRef newUniqueId   CFUUIDCreate kCFAllocatorDefault       NSString   uuidString      bridge transfer NSString  CFUUIDCreateString kCFAllocatorDefault  newUniqueId       CFRelease newUniqueId        return uuidString

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