in iPhone App How to detect the screen resolution of the device

Question

In iPhone App  while running the App on device How to detect the screen resolution of the device on which App is running

User · Answer

See the UIScreen Reference  http   developer apple com library ios  documentation uikit reference UIScreen Class Reference UIScreen html  if   UIScreen mainScreen  respondsToSelector NSSelectorFromString   scale           if    UIScreen mainScreen  scale   lt  1 1          NSLog   Standard Resolution Device         if    UIScreen mainScreen  scale   gt  1 9          NSLog   High Resolution Device

User · Answer

For iOS 8 we can just use this  UIScreen mainScreen  nativeBounds   like that   -  NSInteger resolutionX       return CGRectGetWidth  UIScreen mainScreen  nativeBounds      -  NSInteger resolutionY       return CGRectGetHeight  UIScreen mainScreen  nativeBounds

User · Answer

Use this code it will help for getting any type of device s screen resolution     UIScreen mainScreen  bounds  size height    UIScreen mainScreen  bounds  size width

User · Answer

Use it in App Delegate  I am using storyboard   -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions   if  UI USER INTERFACE IDIOM      UIUserInterfaceIdiomPhone         CGSize iOSDeviceScreenSize     UIScreen mainScreen  bounds  size         ----------------HERE WE SETUP FOR IPHONE 4 4s iPod----------------------      if iOSDeviceScreenSize height    480                      UIStoryboard  iPhone35Storyboard    UIStoryboard storyboardWithName   iPhone  bundle nil               Instantiate the initial view controller object from the storyboard         UIViewController  initialViewController    iPhone35Storyboard instantiateInitialViewController               Instantiate a UIWindow object and initialize it with the screen size of the iOS device         self window     UIWindow alloc  initWithFrame   UIScreen mainScreen  bounds                Set the initial view controller to be the root view controller of the window object         self window rootViewController    initialViewController              Set the window object to be the key window and show it          self window makeKeyAndVisible            iphone   4            NSLog   iPhone 4   f   iOSDeviceScreenSize height                 ----------------HERE WE SETUP FOR IPHONE 5----------------------      if iOSDeviceScreenSize height    568               Instantiate a new storyboard object using the storyboard file named Storyboard iPhone4         UIStoryboard  iPhone4Storyboard    UIStoryboard storyboardWithName   iPhone5  bundle nil               Instantiate the initial view controller object from the storyboard         UIViewController  initialViewController    iPhone4Storyboard instantiateInitialViewController               Instantiate a UIWindow object and initialize it with the screen size of the iOS device         self window     UIWindow alloc  initWithFrame   UIScreen mainScreen  bounds                Set the initial view controller to be the root view controller of the window object         self window rootViewController    initialViewController              Set the window object to be the key window and show it          self window makeKeyAndVisible             NSLog   iPhone 5   f   iOSDeviceScreenSize height           iphone   5            else if  UI USER INTERFACE IDIOM      UIUserInterfaceIdiomPad           NSLog   wqweqe        storyboard    UIStoryboard storyboardWithName   iPad  bundle nil        return YES

User · Answer

UIScreen class lets you find screen resolution in Points and Pixels   Screen resolutions is measured in Points or Pixels  It should never be confused with screen size  A smaller screen size can have higher resolution    UIScreen s  bounds width  return rectangular size in Points   UIScreen s  nativeBounds width  return rectangular size in Pixels This value is detected as PPI   Point per inch    Shows the sharpness  amp  clarity of the Image on a device      You can use UIScreen class to detect all these values   Swift3     Normal Screen Bounds - Detect Screen size in Points  let width   UIScreen main bounds width let height   UIScreen main bounds height print   n width   width   n height   height        Native Bounds - Detect Screen size in Pixels  let nWidth   UIScreen main nativeBounds width let nHeight   UIScreen main nativeBounds height print   n Native Width   nWidth   n Native Height   nHeight      Console  width 736 0  height 414 0  Native Width 1080 0  Native Height 1920 0   Swift 2 x    Normal Bounds - Detect Screen size in Points      let width    UIScreen mainScreen bounds width     let height   UIScreen mainScreen bounds height     Native Bounds - Detect Screen size in Pixels      let nWidth    UIScreen mainScreen nativeBounds width     let nHeight   UIScreen mainScreen nativeBounds height   ObjectiveC     Normal Bounds - Detect Screen size in Points  CGFloat  width     UIScreen mainScreen  bounds size width  CGFloat  height    UIScreen mainScreen  bounds size height      Native Bounds - Detect Screen size in Pixels  CGFloat  width     UIScreen mainScreen  nativeBounds size width CGFloat  height    UIScreen mainScreen  nativeBounds size width

User · Answer

CGRect screenBounds     UIScreen mainScreen  bounds     That will give you the entire screen s resolution in points  so it would most typically be 320x480 for iPhones  Even though the iPhone4 has a much larger screen size iOS still gives back 320x480 instead of 640x960  This is mostly because of older applications breaking   CGFloat screenScale     UIScreen mainScreen  scale     This will give you the scale of the screen  For all devices that do not have Retina Displays this will return a 1 0f  while Retina Display devices will give a 2 0f and the iPhone 6 Plus  Retina HD  will give a 3 0f   Now if you want to get the pixel width  amp  height of the iOS device screen you just need to do one simple thing   CGSize screenSize   CGSizeMake screenBounds size width   screenScale  screenBounds size height   screenScale     By multiplying by the screen s scale you get the actual pixel resolution   A good read on the difference between points and pixels in iOS can be read here   EDIT   Version for Swift   let screenBounds   UIScreen main bounds let screenScale   UIScreen main scale let screenSize   CGSize width  screenBounds size width   screenScale  height  screenBounds size height   screenScale

[ios] in iPhone App How to detect the screen resolution of the device

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