如何在iOS中获得屏幕宽度和高度？

Question

如何才能在iOS中获得屏幕的尺寸？

目前,我使用:

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

在viewWillAppear:和willAnimateRotationToInterfaceOrientation:duration:

我第一次得到整个屏幕尺寸.第二次我屏幕减去导航栏.

Answer 1

如何才能在iOS中获得屏幕的尺寸？

您发布的代码的问题在于您指望视图大小与屏幕的大小相匹配,并且您已经看到并非总是如此.如果您需要屏幕大小,您应该查看代表屏幕本身的对象,如下所示:

CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;

拆分视图更新:在评论中,德米特里问道:

如何在拆分视图中获得屏幕大小？

上面给出的代码报告了屏幕的大小,即使在分屏模式下也是如此.使用分屏模式时,应用程序的窗口会发生变化.如果上面的代码没有提供您期望的信息,那么就像OP一样,您正在查看错误的对象.但是,在这种情况下,你应该看一下窗口而不是屏幕,如下所示:

CGRect windowRect = self.view.window.frame;
CGFloat windowWidth = windowRect.size.width;
CGFloat windowHeight = windowRect.size.height;

Swift 4.2

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

// split screen            
let windowRect = self.view.window?.frame
let windowWidth = windowRect?.size.width
let windowHeight = windowRect?.size.height

Answer 2

小心,[UIScreen mainScreen]也包含状态栏,如果你想检索应用程序的框架(不包括状态栏),你应该使用

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

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

Answer 3

我已将上述一些Objective-C答案翻译成Swift代码.每个翻译都会继续引用原始答案.

主要答案

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

简单的功能答案

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

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

设备方向答案

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
}

记录答案

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

Answer 4

我之前使用过这些方便的方法:

- (CGRect)getScreenFrameForCurrentOrientation {
    return [self getScreenFrameForOrientation:[UIApplication sharedApplication].statusBarOrientation];
}

- (CGRect)getScreenFrameForOrientation:(UIInterfaceOrientation)orientation {

    CGRect fullScreenRect = [[UIScreen mainScreen] bounds];

    // implicitly in Portrait orientation.
    if (UIInterfaceOrientationIsLandscape(orientation)) {
      CGRect temp = CGRectZero;
      temp.size.width = fullScreenRect.size.height;
      temp.size.height = fullScreenRect.size.width;
      fullScreenRect = temp;
    }

    if (![[UIApplication sharedApplication] statusBarHidden]) {
      CGFloat statusBarHeight = 20; // Needs a better solution, FYI statusBarFrame reports wrong in some cases..
      fullScreenRect.size.height -= statusBarHeight;
    }

    return fullScreenRect;
} 

Answer 5

我意识到这是一个老帖子,但有时我觉得#define这样的常量很有用所以我不必担心它:

#define DEVICE_SIZE [[[[UIApplication sharedApplication] keyWindow] rootViewController].view convertRect:[[UIScreen mainScreen] bounds] fromView:nil].size

无论器件方向如何,上述常数应返回正确的大小.然后获取尺寸就像:

lCurrentWidth = DEVICE_SIZE.width;
lCurrentHeight = DEVICE_SIZE.height;

Answer 6

获取设备尺寸非常非常容易,同时考虑到方向:

// 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 7

我们也要考虑设备的方向:

CGFloat screenHeight;
// it is important to do this after presentModalViewController:animated:
if ([[UIApplication sharedApplication] statusBarOrientation] == UIDeviceOrientationPortrait || [[UIApplication sharedApplication] statusBarOrientation] == UIDeviceOrientationPortraitUpsideDown){
    screenHeight = [UIScreen mainScreen].applicationFrame.size.height;
}
else{
    screenHeight = [UIScreen mainScreen].applicationFrame.size.width;
}

Answer 8

NSLog(@"%.0f", [[UIScreen mainScreen] bounds].size.width);
NSLog(@"%.0f", [[UIScreen mainScreen] bounds].size.height);

Answer 9

利用这些Structs来了解有关 Swift 3.0 中当前设备的有用信息

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)
    static let iOS13              = (iOSVersion.SYS_VERSION_FLOAT >= 13.0 && iOSVersion.SYS_VERSION_FLOAT < 14.0)
    static let iOS14              = (iOSVersion.SYS_VERSION_FLOAT >= 14.0 && iOSVersion.SYS_VERSION_FLOAT < 15.0)
    static let iOS15              = (iOSVersion.SYS_VERSION_FLOAT >= 15.0 && iOSVersion.SYS_VERSION_FLOAT < 16.0)
    
}

Answer 10

在这里，我已经更新了迅速3

自iOS 9起不推荐使用applicationFrame

很快，他们删除了（）并且更改了一些命名约定，您可以在这里参考链接

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

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

Answer 11

现代答案：

如果你的应用支持 iPad 上的分屏，这个问题就变得有点复杂了。您需要窗口的大小，而不是屏幕的大小，它可能包含 2 个应用程序。运行时窗口的大小也可能会有所不同。

使用应用程序主窗口的大小：

UIApplication.shared.delegate?.window??.bounds.size ?? .zero

注意：上述方法可能会在启动时在窗口成为关键窗口之前得到错误的值。如果您只需要宽度，非常推荐以下方法：

UIApplication.shared.statusBarFrame.width

使用的旧解决方案UIScreen.main.bounds将返回设备的边界。如果您的应用在拆分视图模式下运行，则会获得错误的尺寸。

self.view.window 当应用程序包含 2 个或更多窗口并且窗口尺寸较小时，最热门的答案中的尺寸可能会错误。