在iPhone应用程序中如何检测设备的屏幕分辨率。

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

在iPhone应用程序中，运行App时如何检测App运行的设备的屏幕分辨率?

6 个解决方案

#1

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.

这将为你提供以点为单位的整个屏幕分辨率，因此iphone的分辨率通常为320x480。尽管iPhone4的屏幕尺寸比iOS大得多，但iOS仍然会回馈320x480，而不是640x960。这主要是因为旧的应用程序崩溃了。

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.

这将给出屏幕的大小。对于所有没有视网膜显示屏的设备，这将返回1.0f，而视网膜显示屏设备将给出2.0f, iPhone 6 Plus (Retina HD)将给出3.0f。

Now if you want to get the pixel width & height of the iOS device screen you just need to do one simple thing.

现在，如果你想要得到iOS设备屏幕的像素宽度和高度，你只需要做一件简单的事情。

CGSize screenSize = CGSizeMake(screenBounds.size.width * screenScale, screenBounds.size.height * screenScale);

By multiplying by the screen's scale you get the actual pixel resolution.

通过乘以屏幕的比例，你得到了实际的像素分辨率。

A good read on the difference between points and pixels in iOS can be read here.

可以在这里阅读关于iOS中的点和像素之间的区别的好书。

EDIT: (Version for Swift)

编辑:斯威夫特(版本)

let screenBounds = UIScreen.main.bounds
let screenScale = UIScreen.main.scale
let screenSize = CGSize(width: screenBounds.size.width * screenScale, height: screenBounds.size.height * screenScale)

#2

UIScreen class lets you find screen resolution in Points and Pixels.

UIScreen类允许您以点和像素为单位查找屏幕分辨率。

Screen resolutions is measured in Points or Pixels. It should never be confused with screen size. A smaller screen size can have higher resolution.

屏幕分辨率是以点或像素来度量的。它不应该与屏幕大小混淆。屏幕尺寸越小，分辨率越高。

UIScreen's 'bounds.width' return rectangular size in Points

UIScreen的界限。宽度以点为单位返回矩形尺寸

UIScreen's 'nativeBounds.width' return rectangular size in Pixels.This value is detected as PPI ( Point per inch ). Shows the sharpness & clarity of the Image on a device.

UIScreen的nativeBounds。宽度'返回矩形大小以像素为单位。这个值被检测为PPI(每英寸点)。显示设备上图像的清晰度和清晰度。

You can use UIScreen class to detect all these values.

您可以使用UIScreen类来检测所有这些值。

Swift3

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

控制台

width:736.0 
height:414.0

Native Width:1080.0 
Native Height:1920.0

Swift 2.x

快2.倍

//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

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

#3

Use it in App Delegate: I am using storyboard

在App委托中使用:我正在使用故事板

- (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;
 }

#4

See the UIScreen Reference: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIScreen_Class/Reference/UIScreen.html

参见UIScreen引用:http://developer.apple.com/library/ios/#文档/uikit/ Reference/ UIScreen_Class/Reference/UIScreen.html

if([[UIScreen mainScreen] respondsToSelector:NSSelectorFromString(@"scale")])
{
    if ([[UIScreen mainScreen] scale] < 1.1)
        NSLog(@"Standard Resolution Device");

    if ([[UIScreen mainScreen] scale] > 1.9)
        NSLog(@"High Resolution Device");
}

#5

For iOS 8 we can just use this [UIScreen mainScreen].nativeBounds , like that:

对于iOS 8，我们可以使用这个[UIScreen主屏幕]。nativeBounds,像这样:

- (NSInteger)resolutionX
{
    return CGRectGetWidth([UIScreen mainScreen].nativeBounds);
}

- (NSInteger)resolutionY
{
    return CGRectGetHeight([UIScreen mainScreen].nativeBounds);
}

#6

Use this code it will help for getting any type of device's screen resolution

使用此代码将有助于获得任何类型的设备的屏幕分辨率

 [[UIScreen mainScreen] bounds].size.height
 [[UIScreen mainScreen] bounds].size.width