在iOS中如何获得屏幕的尺寸?
目前,我使用:
lCurrentWidth = self.view.frame.size.width;
lCurrentHeight = self.view.frame.size.height;
在viewWillAppear:和willAnimateRotationToInterfaceOrientation:duration:
这是我第一次看到整个屏幕的大小。第二次我得到的屏幕减去导航栏。
在iOS中如何获得屏幕的尺寸?
目前,我使用:
lCurrentWidth = self.view.frame.size.width;
lCurrentHeight = self.view.frame.size.height;
在viewWillAppear:和willAnimateRotationToInterfaceOrientation:duration:
这是我第一次看到整个屏幕的大小。第二次我得到的屏幕减去导航栏。
当前回答
iOS 13+的答案(找到键窗口的代码来源):
guard let window = UIApplication.shared.windows.first(where: { $0.isKeyWindow }) else {
return
}
let windowWidth = window.frame.width
let windowHeight = window.frame.height
其他回答
如果你想让屏幕宽度/高度与设备方向无关(只适用于从横向方向启动的视图控制器的纵向大小):
CGFloat screenWidthInPoints = [UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale;
CGFloat screenHeightInPoints = [UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale;
[UIScreen mainScreen]。物理屏幕的边界矩形,以像素为单位。这个矩形是基于设备的肖像向上方向。该值不会随着设备的旋转而改变。
注意,[UIScreen mainScreen]包含状态栏,如果你想检索你的应用程序的框架(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;
}
我们还必须考虑设备的朝向:
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;
}
在iOS中如何获得屏幕的尺寸?
你所发布的代码的问题是,你指望视图的大小与屏幕的大小相匹配,正如你所看到的,情况并不总是这样。如果你需要屏幕大小,你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,Dmitry问道:
如何在分屏视图中获取屏幕的大小?
上面给出的代码报告屏幕的大小,即使在分屏模式下也是如此。当你使用分屏模式时,应用程序的窗口会发生变化。如果上面的代码没有提供您所期望的信息,那么就像OP一样,您找错对象了。在这种情况下,你应该看着窗口而不是屏幕,就像这样:
CGRect windowRect = self.view.window.frame;
CGFloat windowWidth = windowRect.size.width;
CGFloat windowHeight = windowRect.size.height;
斯威夫特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
利用这些struct来了解Swift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)
static let iOS16 = (iOSVersion.SYS_VERSION_FLOAT >= 16.0 && iOSVersion.SYS_VERSION_FLOAT < 17.0)
}