Question

如何让iPhone屏幕尺寸进行计算？

Answer 1

您可以在UIScreen实例上使用bounds属性：

CGRect screenBound = [[UIScreen mainScreen] bounds];
CGSize screenSize = screenBound.size;  
CGFloat screenWidth = screenSize.width;
CGFloat screenHeight = screenSize.height;

大多数人都想要主屏幕;如果你有一台设备连接到电视，你可能想要迭代UIScreens并获得每个设备的界限。

UIScreen class docs的更多信息。

Answer 2

这是一个快速的＆＃39;解：（更新为swift 3.x）

let screenWidth  = UIScreen.main.fixedCoordinateSpace.bounds.width
let screenHeight = UIScreen.main.fixedCoordinateSpace.bounds.height

这是以像素为单位报告的，并且＆＃34;始终以纵向向上的方式反映[s]设备的屏幕尺寸＆＃34; (Apple Docs)。无需烦恼UIAnnoyinglyLongDeviceOrientation！

如果您希望宽度和高度反映设备方向：

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

此处宽度和高度将根据屏幕是纵向还是横向显示翻转值。

以下是如何以像素而不是点来衡量屏幕尺寸：

let screenWidthInPixels = UIScreen.main.nativeBounds.width
let screenHeightInPixels = UIScreen.main.nativeBounds.height

这也＆＃34;基于设备的纵向向上。设备旋转时，此值不会更改。＆＃34; (Apple Docs)

请注意，对于swift 2.x及更低版本，您应使用UIScreen.mainScreen()代替UIScreen.main

Answer 3

使用此代码修复iOS8：

float SW;
float SH;
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
if (( [[[UIDevice currentDevice] systemVersion] floatValue]<8)  && UIInterfaceOrientationIsLandscape(orientation))
{
    SW = [[UIScreen mainScreen] bounds].size.height;
    SH = [[UIScreen mainScreen] bounds].size.width;
}
else
{
    SW = [[UIScreen mainScreen] bounds].size.width;
    SH = [[UIScreen mainScreen] bounds].size.height;
}

Answer 4

如果您想知道某个视图的大小，请使用bounds的属性UIView;如果您想了解设备的屏幕尺寸，请使用[[UIScreen mainScreen] bounds]。

Answer 5

与上述相似但略显冗长：

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

Answer 6

float screen_Height;
float screen_Width;

if ([[[UIDevice currentDevice] systemVersion] floatValue]  >= 8) {
    screen_Height = [[UIScreen mainScreen] bounds].size.height;
    screen_Width = [[UIScreen mainScreen] bounds].size.width;
} else {
    screen_Height = ((([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait) || ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown)) ? [[UIScreen mainScreen] bounds].size.height : [[UIScreen mainScreen] bounds].size.width);
    screen_Width = ((([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait) || ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown)) ? [[UIScreen mainScreen] bounds].size.width : [[UIScreen mainScreen] bounds].size.height);
}

Answer 7

以下是获取屏幕尺寸的Swift方法：

var screenWidth: CGFloat {
    if UIInterfaceOrientationIsPortrait(screenOrientation) {
        return UIScreen.mainScreen().bounds.size.width
    } else {
        return UIScreen.mainScreen().bounds.size.height
    }
}
var screenHeight: CGFloat {
    if UIInterfaceOrientationIsPortrait(screenOrientation) {
        return UIScreen.mainScreen().bounds.size.height
    } else {
        return UIScreen.mainScreen().bounds.size.width
    }
}
var screenOrientation: UIInterfaceOrientation {
    return UIApplication.sharedApplication().statusBarOrientation
}

这些包含在标准函数here中。

这也在文档中。

Answer 8

[[UIScreen mainScreen] bounds]返回物理屏幕尺寸，而不考虑设备方向。

如果您需要根据当前方向获取屏幕尺寸，请查看How to get orientation-dependent height and width of the screen?

Answer 9

使用UIScreen的界限是一种很好的方法，但您应该使用CGGeometry函数来访问CGRect的数据而不是直接访问它。请参阅CGGeometry docs。

CGRect screenBound = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = CGRectGetWidth(screenBound);
CGFloat screenHeight = CGRectGetHeight(screenBound);

Answer 10

假设您想考虑当前的方向，请使用：

float screen_width;
float screen_height;
float vers = [[[UIDevice currentDevice] systemVersion] floatValue];
UIInterfaceOrientation orient = [UIApplication sharedApplication].statusBarOrientation;
if (vers < 8 && UIInterfaceOrientationIsLandscape(orient))
{
    screen_height = [[UIScreen mainScreen] bounds].size.width;
    screen_width = [[UIScreen mainScreen] bounds].size.height;
}
else
{
    screen_width = [[UIScreen mainScreen] bounds].size.width;
    screen_height = [[UIScreen mainScreen] bounds].size.height;
}

Answer 11

对于Xamarian同伴-这是在Xamarin.iOS + C＃中获取屏幕尺寸的方法：

var screenBound = UIScreen.MainScreen.Bounds;
var screenSize = screenBound.Size;
var height = screenSize.Height;
var width = screenSize.Width;

Answer 12

var PT: CGFloat = 0;

override func viewDidLoad() {

    super.viewDidLoad()
    setPoints();

}

func setPoints() {

    let screenBounds = UIScreen.main.bounds

    let screenScale = UIScreen.main.scale

    let screenSize = CGSize(width: screenBounds.size.width * screenScale, height: screenBounds.size.height * screenScale)

    
    let nativeBounds = UIScreen.main.nativeBounds

    let nativeScale = UIScreen.main.nativeScale

    
    let pxScreenWidth:CGFloat = nativeBounds.width;

    let ptScreenWidth:CGFloat = screenBounds.width;

    PT = pxScreenWidth/ptScreenWidth/nativeScale;

}

使用方法：

let label: UILabel = UILabel(frame: CGRect(x: 15 * PT, y: 10 * PT, width: self.view.frame.width - 30 * PT, height: self.view.frame.height - 20 * PT))

如何使用iOS上的代码获取屏幕大小？

12 个答案: