How can we programmatically detect which iOS version is device running on

Question

I want to check if the user is running the app on iOS less than 5 0 and display a label in the app   How do I detect which iOS is running on user s device programmatically   Thanks

User · Answer

UIDevice currentDevice  systemVersion

User · Answer

Marek Sebera s is great most of the time  but if you re like me and find that you need to check the iOS version frequently  you don t want to constantly run a macro in memory because you ll experience a very slight slowdown  especially on older devices   Instead  you want to compute the iOS version as a float once and store it somewhere  In my case  I have a GlobalVariables singleton class that I use to check the iOS version in my code using code like this   if   GlobalVariables sharedVariables  iOSVersion  gt   6 0f           do something if iOS is 6 0 or greater     To enable this functionality in your app  use this code  for iOS 5  using ARC    GlobalVariables h    interface GlobalVariables   NSObject   property  nonatomic  CGFloat iOSVersion          GlobalVariables   sharedVariables    end   GlobalVariables m    implementation GlobalVariables   synthesize iOSVersion      GlobalVariables   sharedVariables          set up the global variables as a static object     static GlobalVariables  globalVariables   nil         check if global variables exist     if  globalVariables    nil               if no  create the global variables class         globalVariables     GlobalVariables alloc  init              get system version         NSString  systemVersion     UIDevice currentDevice  systemVersion              separate system version by periods         NSArray  systemVersionComponents    systemVersion componentsSeparatedByString                   set ios version         globalVariables iOSVersion     NSString stringWithFormat    01d  02d 02d                                            systemVersionComponents count  lt  1   0                                              systemVersionComponents objectAtIndex 0  integerValue                                            systemVersionComponents count  lt  2   0                                              systemVersionComponents objectAtIndex 1  integerValue                                            systemVersionComponents count  lt  3   0                                              systemVersionComponents objectAtIndex 2  integerValue                                             floatValue                return singleton instance     return globalVariables      end   Now you re able to easily check the iOS version without running macros constantly  Note in particular how I converted the   UIDevice currentDevice  systemVersion  NSString to a CGFloat that is constantly accessible without using any of the improper methods many have already pointed out on this page  My approach assumes the version string is in the format n nn nn  allowing for later bits to be missing  and works for iOS5   In testing  this approach runs much faster than constantly running the macro   Hope this helps anyone experiencing the issue I had

User · Answer

In MonoTouch    To get the Major version use     UIDevice CurrentDevice SystemVersion Split      0    For minor version use     UIDevice CurrentDevice SystemVersion Split      1

User · Answer

UIDevice currentDevice  systemVersion  floatValue

User · Answer

I know I am too late to answer this question  I am not sure does my method still working on low iOS versions   lt  5 0    NSString  platform    UIDevice currentDevice  model   NSLog    UIDevice currentDevice  model      platform   NSLog    UIDevice currentDevice  description       UIDevice currentDevice  description   NSLog    UIDevice currentDevice  localizedModel       UIDevice currentDevice  localizedModel   NSLog    UIDevice currentDevice  name       UIDevice currentDevice  name   NSLog    UIDevice currentDevice  systemVersion       UIDevice currentDevice  systemVersion   NSLog    UIDevice currentDevice  systemName       UIDevice currentDevice  systemName     You can get these results    UIDevice currentDevice  model  iPhone  UIDevice currentDevice  description   lt UIDevice  0x1cd75c70 gt   UIDevice currentDevice  localizedModel  iPhone  UIDevice currentDevice  name  Someones-iPhone002  UIDevice currentDevice  systemVersion  6 1 3  UIDevice currentDevice  systemName  iPhone OS

User · Answer

UIDevice currentDevice  systemVersion    or check the version like  You can get the below Macros from here   if  SYSTEM VERSION GREATER THAN OR EQUAL TO IOS VERSION 3 2 0                    UIImageView  background      UIImageView alloc  initWithImage  UIImage imageNamed   cs lines back png    autorelease           theTableView backgroundView   background       Hope this helps

User · Answer

Best current version  without need to deal with numeric search within NSString is to define macros  See original answer  Check iPhone iOS Version   Those macros do exist in github  see  https   github com carlj CJAMacros blob master CJAMacros CJAMacros h    Like this    define SYSTEM VERSION EQUAL TO v                       UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedSame   define SYSTEM VERSION GREATER THAN v                   UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedDescending   define SYSTEM VERSION GREATER THAN OR EQUAL TO v       UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending   define SYSTEM VERSION LESS THAN v                      UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending   define SYSTEM VERSION LESS THAN OR EQUAL TO v          UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedDescending    and use them like this   if  SYSTEM VERSION LESS THAN   5 0             code here    if  SYSTEM VERSION GREATER THAN OR EQUAL TO   6 0             code here       Outdated version below  to get OS version     UIDevice currentDevice  systemVersion    returns string  which can be turned into int float via  - NSString floatValue  - NSString intValue    like this     Both values  floatValue  intValue  will be stripped due to its type  5 0 1 will become 5 0 or 5  float or int   for comparing precisely  you will have to separate it to array of INTs      check accepted answer here  Check iPhone iOS Version   NSString  ver     UIDevice currentDevice  systemVersion   int ver int    ver intValue   float ver float    ver floatValue     and compare like this  NSLog   System Version is       UIDevice currentDevice  systemVersion    NSString  ver     UIDevice currentDevice  systemVersion   float ver float    ver floatValue   if  ver float  lt  5 0  return false    For Swift 4 0 syntax  below example is just checking if the device is of iOS11 or greater version   let systemVersion   UIDevice current systemVersion if systemVersion cgFloatValue  gt   11 0          for ios 11      else        ios below 11

User · Answer

To get more specific version number information with major and minor versions separated   NSString  versionString    UIDevice currentDevice  systemVersion  NSArray  vN    versionString componentsSeparatedByString          The array vN will contain the major and minor versions as strings  but if you want to do comparisons  version numbers should be stored as numbers  ints   You can add this code to store them in the C-array  versionNumbers   int versionNumbers vN count   for  int i   0  i  lt  sizeof versionNumbers  sizeof versionNumbers 0    i        versionNumbers i      vN objectAtIndex i  integerValue       C-arrays used here for more concise syntax

User · Answer

A simple check for iOS version less than 5  all versions    if    UIDevice currentDevice  systemVersion  integerValue   lt  5              do something

User · Answer

Update  From iOS 8 we can use the new isOperatingSystemAtLeastVersion method on NSProcessInfo     NSOperatingSystemVersion ios8 0 1    NSOperatingSystemVersion  8  0  1      if    NSProcessInfo processInfo  isOperatingSystemAtLeastVersion ios8 0 1              iOS 8 0 1 and above logic      else            iOS 8 0 0 and below logic        Beware that this will crash on iOS 7  as the API didn t exist prior to iOS 8  If you re supporting iOS 7 and below  you can safely perform the check with  if   NSProcessInfo instancesRespondToSelector  selector isOperatingSystemAtLeastVersion            conditionally check for any version  gt   iOS 8 using  isOperatingSystemAtLeastVersion    else        we re on iOS 7 or below       Original answer iOS  lt  8  For the sake of completeness  here s an alternative approach proposed by Apple itself in the iOS 7 UI Transition Guide  which involves checking the Foundation Framework version   if  floor NSFoundationVersionNumber   lt   NSFoundationVersionNumber iOS 6 1          Load resources for iOS 6 1 or earlier   else         Load resources for iOS 7 or later

[iphone] How can we programmatically detect which iOS version is device running on?

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