How to get the screen width and height in iOS?

Question

How can one get the dimensions of the screen in iOS?

Currently, I use:

lCurrentWidth = self.view.frame.size.width;
lCurrentHeight = self.view.frame.size.height;

in viewWillAppear: and willAnimateRotationToInterfaceOrientation:duration:

The first time I get the entire screen size. The second time i get the screen minus the nav bar.

Answer 1

Careful, [UIScreen mainScreen] contains status bar as well, if you want to retrieve the frame for your application (excluding status bar) you should use

+ (CGFloat) window_height   {
    return [UIScreen mainScreen].applicationFrame.size.height;
}

+ (CGFloat) window_width   {
    return [UIScreen mainScreen].applicationFrame.size.width;
}

Answer 2

I've translated some of the above Objective-C answers into Swift code. Each translation is proceeded with a reference to the original answer.

Main Answer

let screen = UIScreen.main.bounds
let screenWidth = screen.size.width
let screenHeight = screen.size.height

Simple Function Answer

func windowHeight() -> CGFloat {
    return UIScreen.mainScreen().applicationFrame.size.height
}

func windowWidth() -> CGFloat {
    return UIScreen.mainScreen().applicationFrame.size.width
}

Device Orientation Answer

var screenHeight : CGFloat
let statusBarOrientation = UIApplication.sharedApplication().statusBarOrientation
// it is important to do this after presentModalViewController:animated:
if (statusBarOrientation != UIInterfaceOrientation.Portrait
    && statusBarOrientation != UIInterfaceOrientation.PortraitUpsideDown){
    screenHeight = UIScreen.mainScreen().applicationFrame.size.width
} else {
    screenHeight = UIScreen.mainScreen().applicationFrame.size.height
}

Log Answer

let screenWidth = UIScreen.mainScreen().bounds.size.width
let screenHeight = UIScreen.mainScreen().bounds.size.height
println("width: \(screenWidth)")
println("height: \(screenHeight)")

Answer 3

It's very, very easy to get your device size as well as take into account the orientation:

// grab the window frame and adjust it for orientation
UIView *rootView = [[[UIApplication sharedApplication] keyWindow] 
                                   rootViewController].view;
CGRect originalFrame = [[UIScreen mainScreen] bounds];
CGRect adjustedFrame = [rootView convertRect:originalFrame fromView:nil];

Answer 4

Make use of these Structs to know useful info about the current device in Swift 3.0

struct ScreenSize { // Answer to OP's question

    static let SCREEN_WIDTH         = UIScreen.main.bounds.size.width
    static let SCREEN_HEIGHT        = UIScreen.main.bounds.size.height
    static let SCREEN_MAX_LENGTH    = max(ScreenSize.SCREEN_WIDTH, ScreenSize.SCREEN_HEIGHT)
    static let SCREEN_MIN_LENGTH    = min(ScreenSize.SCREEN_WIDTH, ScreenSize.SCREEN_HEIGHT)

}

struct DeviceType { //Use this to check what is the device kind you're working with

    static let IS_IPHONE_4_OR_LESS  = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH < 568.0
    static let IS_IPHONE_SE         = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 568.0
    static let IS_IPHONE_7          = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 667.0
    static let IS_IPHONE_7PLUS      = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 736.0
    static let IS_IPHONE_X          = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 812.0
    static let IS_IPAD              = UIDevice.current.userInterfaceIdiom == .pad && ScreenSize.SCREEN_MAX_LENGTH == 1024.0

}


struct iOSVersion { //Get current device's iOS version

    static let SYS_VERSION_FLOAT  = (UIDevice.current.systemVersion as NSString).floatValue
    static let iOS7               = (iOSVersion.SYS_VERSION_FLOAT >= 7.0 && iOSVersion.SYS_VERSION_FLOAT < 8.0)
    static let iOS8               = (iOSVersion.SYS_VERSION_FLOAT >= 8.0 && iOSVersion.SYS_VERSION_FLOAT < 9.0)
    static let iOS9               = (iOSVersion.SYS_VERSION_FLOAT >= 9.0 && iOSVersion.SYS_VERSION_FLOAT < 10.0)
    static let iOS10              = (iOSVersion.SYS_VERSION_FLOAT >= 10.0 && iOSVersion.SYS_VERSION_FLOAT < 11.0)
    static let iOS11              = (iOSVersion.SYS_VERSION_FLOAT >= 11.0 && iOSVersion.SYS_VERSION_FLOAT < 12.0)
    static let iOS12              = (iOSVersion.SYS_VERSION_FLOAT >= 12.0 && iOSVersion.SYS_VERSION_FLOAT < 13.0)

}

Answer 5

You can place these macros in your pch file and used at anywhere in project by using "SCREEN_WIDTH"

#define SCREEN_WIDTH                ((([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait) || ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown)) ? [[UIScreen mainScreen] bounds].size.width : [[UIScreen mainScreen] bounds].size.height)

and "SCREEN_HEIGHT"

#define SCREEN_HEIGHT               ((([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait) || ([UIApplication sharedApplication].statusBarOrientation ==   UIInterfaceOrientationPortraitUpsideDown)) ? [[UIScreen mainScreen] bounds].size.height : [[UIScreen mainScreen] bounds].size.width)

Example of using:

CGSize calCulateSizze ;
calCulateSizze.width = SCREEN_WIDTH/2-8;
calCulateSizze.height = SCREEN_WIDTH/2-8;

Answer 6

Here i have updated for swift 3

applicationFrame deprecated from iOS 9

In swift three they have removed () and they have changed few naming convention, you can refer here Link

func windowHeight() -> CGFloat {
    return UIScreen.main.bounds.size.height
}

func windowWidth() -> CGFloat {
    return UIScreen.main.bounds.size.width
}