blocks|key|2308135|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2308136|如何在iOS中获得屏幕的尺寸？|blockquote|2308137|2308138|2308139|您发布的代码的问题是，您希望视图大小与屏幕的大小相匹配，正如您所看到的，情况并不总是如此。如果您需要屏幕大小，您应该查看表示屏幕本身的对象，如下所示：|2308140|CGRect+screenRect+=+[[UIScreen+mainScreen]+bounds];
CGFloat+screenWidth+=+screenRect.size.width;
CGFloat+screenHeight+=+screenRect.size.height;|code-block|syntax|javascript|2308141|拆分视图的更新：在评论中，Dmitry询问：|offset|length|style|BOLD|2308142|2308143|如何在拆分视图中获取屏幕的大小？|2308144|2308145|2308146|上面给出的代码报告了屏幕的大小，即使在拆分屏幕模式下也是如此。当你使用分屏模式时，你的应用程序的窗口会发生变化。如果上面的代码没有给出您期望的信息，那么就像OP一样，您看错了对象。不过，在这种情况下，您应该查看窗口而不是屏幕，如下所示：|2308147|CGRect+windowRect+=+self.view.window.frame;
CGFloat+windowWidth+=+windowRect.size.width;
CGFloat+windowHeight+=+windowRect.size.height;|2308148|Swift+4.2|2308149|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|2308150|entityMap^0|0|0|0|0|0|0|5|3|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|17|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|18|7|@]|8|@]|9|$]]|$1|D|3|-4|4|5|6|19|7|@]|8|@]|9|$]]|$1|E|3|-4|4|5|6|1A|7|@]|8|@]|9|$]]|$1|F|3|G|4|5|6|1B|7|@]|8|@]|9|$]]|$1|H|3|I|4|J|6|1C|7|@]|8|@]|9|$K|L]]|$1|M|3|N|4|5|6|1D|7|@$O|1E|P|1F|Q|R]]|8|@]|9|$]]|$1|S|3|-4|4|5|6|1G|7|@]|8|@]|9|$]]|$1|T|3|U|4|C|6|1H|7|@]|8|@]|9|$]]|$1|V|3|-4|4|5|6|1I|7|@]|8|@]|9|$]]|$1|W|3|-4|4|5|6|1J|7|@]|8|@]|9|$]]|$1|X|3|Y|4|5|6|1K|7|@]|8|@]|9|$]]|$1|Z|3|10|4|J|6|1L|7|@]|8|@]|9|$K|L]]|$1|11|3|12|4|5|6|1M|7|@]|8|@]|9|$]]|$1|13|3|14|4|J|6|1N|7|@]|8|@]|9|$K|L]]|$1|15|3|-4|4|5|6|1O|7|@]|8|@]|9|$]]]|16|$]]

<blockquote>
 How can one get the dimensions of the screen in iOS?
</blockquote>

The problem with the code that you posted is that you're counting on the view size to match that of the screen, and as you've seen that's not always the case. If you need the screen size, you should look at the object that represents the screen itself, like this:

<pre><code>CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;
</code></pre>

Update for split view: In comments, Dmitry asked:

<blockquote>
 How can I get the size of the screen in the split view?
</blockquote>

The code given above reports the size of the screen, even in split screen mode. When you use split screen mode, your app's window changes. If the code above doesn't give you the information you expect, then like the OP, you're looking at the wrong object. In this case, though, you should look at the window instead of the screen, like this:

<pre><code>CGRect windowRect = self.view.window.frame;
CGFloat windowWidth = windowRect.size.width;
CGFloat windowHeight = windowRect.size.height;
</code></pre>

<h2>Swift 4.2</h2>

<pre><code>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
</code></pre>

blocks|key|3973429|text|我以前用过这些方便的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3973430|-+(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;
}+|code-block|syntax|javascript|3973431|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have used these convenience methods before:

<pre><code>- (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;
} 
</code></pre>

blocks|key|282087|text|注意，UIScreen+mainScreen也包含状态栏，如果您想要检索应用程序的框架(不包括状态栏)，您应该使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|282088|%2B+(CGFloat)+window_height+++{
++++return+[UIScreen+mainScreen].applicationFrame.size.height;
}

%2B+(CGFloat)+window_width+++{
++++return+[UIScreen+mainScreen].applicationFrame.size.width;
}|code-block|syntax|javascript|282089|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

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

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

+ (CGFloat) window_width {
 return [UIScreen mainScreen].applicationFrame.size.width;
}
</code></pre>

blocks|key|282122|text|这是非常，非常容易获得你的设备大小以及考虑到方向：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|282123|//+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];|code-block|syntax|javascript|282124|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

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

<pre><code>// 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];
</code></pre>

blocks|key|2308305|text|我意识到这是一个古老的帖子，但有时我发现像这样定义常量很有用，这样我就不必担心了：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2308306|#define+DEVICE_SIZE+[[[[UIApplication+sharedApplication]+keyWindow]+rootViewController].view+convertRect:[[UIScreen+mainScreen]+bounds]+fromView:nil].size|code-block|syntax|javascript|2308307|无论设备方向如何，上面的常量都应该返回正确的大小。那么获取维度就像下面这样简单：|2308308|lCurrentWidth+=+DEVICE_SIZE.width;
lCurrentHeight+=+DEVICE_SIZE.height;|2308309|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I realize that this is an old post, but sometimes I find it useful to #define constants like these so I do not have to worry about it:

<pre><code>#define DEVICE_SIZE [[[[UIApplication sharedApplication] keyWindow] rootViewController].view convertRect:[[UIScreen mainScreen] bounds] fromView:nil].size
</code></pre>

The above constant should return the correct size no matter the device orientation. Then getting the dimensions is as simple as:

<pre><code>lCurrentWidth = DEVICE_SIZE.width;
lCurrentHeight = DEVICE_SIZE.height;
</code></pre>

blocks|key|1902848|text|我们还必须考虑设备的方向：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1902849|CGFloat+screenHeight;
//+it+is+important+to+do+this+after+presentModalViewController:animated:
if+([[UIApplication+sharedApplication]+statusBarOrientation]+==+UIDeviceOrientationPortrait+%7C%7C+[[UIApplication+sharedApplication]+statusBarOrientation]+==+UIDeviceOrientationPortraitUpsideDown){
++++screenHeight+=+[UIScreen+mainScreen].applicationFrame.size.height;
}
else{
++++screenHeight+=+[UIScreen+mainScreen].applicationFrame.size.width;
}|code-block|syntax|javascript|1902850|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

We have to consider the orientation of device too: 

<pre><code>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;
}
</code></pre>

blocks|key|282191|text|NSLog(@"%25.0f",+[[UIScreen+mainScreen]+bounds].size.width);
NSLog(@"%25.0f",+[[UIScreen+mainScreen]+bounds].size.height);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|282192|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>NSLog(@"%.0f", [[UIScreen mainScreen] bounds].size.width);
NSLog(@"%.0f", [[UIScreen mainScreen] bounds].size.height);
</code></pre>

blocks|key|2298260|text|我已经将上面的一些Objective-C答案翻译成了Swift代码。每次翻译都会引用原始答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2298261|Main+Answer|offset|length|2298262|let+screen+=+UIScreen.main.bounds
let+screenWidth+=+screen.size.width
let+screenHeight+=+screen.size.height|code-block|syntax|javascript|2298263|##Simple+Function+Answer|2298264|func+windowHeight()+->+CGFloat+{
++++return+UIScreen.main.bounds.size.height
}

func+windowWidth()+->+CGFloat+{
++++return+UIScreen.main.bounds.size.width
}|2298265|##Device+Orientation+Answer|2298266|let+screenHeight:+CGFloat
let+statusBarOrientation+=+UIApplication.shared.statusBarOrientation
//+it+is+important+to+do+this+after+presentModalViewController:animated:
if+(statusBarOrientation+!=+.portrait
++++&&+statusBarOrientation+!=+.portraitUpsideDown)+{
++++screenHeight+=+UIScreen.main.bounds.size.width
}+else+{
++++screenHeight+=+UIScreen.main.bounds.size.height
}|2298267|##Log+Answer|2298268|let+screenWidth+=+UIScreen.main.bounds.size.width
let+screenHeight+=+UIScreen.main.bounds.size.height
println("width:+\(screenWidth)")
println("height:+\(screenHeight)")|2298269|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/5678199|1|https://stackoverflow.com/a/13513192|2|https://stackoverflow.com/a/19186008|3|https://stackoverflow.com/a/23710839^0|0|0|B|0|0|0|2|M|1|0|0|2|P|2|0|0|2|A|3|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|F|3|G|5|H|7|1F|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|1G|8|@]|9|@$D|1H|E|1I|1|1J]]|A|$]]|$1|M|3|N|5|H|7|1K|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|1L|8|@]|9|@$D|1M|E|1N|1|1O]]|A|$]]|$1|Q|3|R|5|H|7|1P|8|@]|9|@]|A|$I|J]]|$1|S|3|T|5|6|7|1Q|8|@]|9|@$D|1R|E|1S|1|1T]]|A|$]]|$1|U|3|V|5|H|7|1U|8|@]|9|@]|A|$I|J]]|$1|W|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|Z|10|11|A|$12|15]]|16|$5|Z|10|11|A|$12|17]]|18|$5|Z|10|11|A|$12|19]]]]

I've translated some of the above Objective-C answers into Swift code. Each translation is proceeded with a reference to the original answer.
<h2><a href="https://stackoverflow.com/a/5678199">Main Answer</a></h2>
<pre><code>let screen = UIScreen.main.bounds
let screenWidth = screen.size.width
let screenHeight = screen.size.height
</code></pre>
##<a href="https://stackoverflow.com/a/13513192">Simple Function Answer</a>
<pre><code>func windowHeight() -&gt; CGFloat {
 return UIScreen.main.bounds.size.height
}

func windowWidth() -&gt; CGFloat {
 return UIScreen.main.bounds.size.width
}
</code></pre>
##<a href="https://stackoverflow.com/a/19186008">Device Orientation Answer</a>
<pre><code>let screenHeight: CGFloat
let statusBarOrientation = UIApplication.shared.statusBarOrientation
// it is important to do this after presentModalViewController:animated:
if (statusBarOrientation != .portrait
 &amp;&amp; statusBarOrientation != .portraitUpsideDown) {
 screenHeight = UIScreen.main.bounds.size.width
} else {
 screenHeight = UIScreen.main.bounds.size.height
}
</code></pre>
##<a href="https://stackoverflow.com/a/23710839">Log Answer</a>
<pre><code>let screenWidth = UIScreen.main.bounds.size.width
let screenHeight = UIScreen.main.bounds.size.height
println(&quot;width: \(screenWidth)&quot;)
println(&quot;height: \(screenHeight)&quot;)
</code></pre>

blocks|key|282243|text|您可以将这些宏放在pch文件中，并使用"SCREEN_WIDTH“在项目中的任何位置使用它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|282244|#define+SCREEN_WIDTH++++++++++++++++((([UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationPortrait)+%7C%7C+([UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationPortraitUpsideDown))+?+[[UIScreen+mainScreen]+bounds].size.width+:+[[UIScreen+mainScreen]+bounds].size.height)|code-block|syntax|javascript|282245|和"SCREEN_HEIGHT“|282246|#define+SCREEN_HEIGHT+++++++++++++++((([UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationPortrait)+%7C%7C+([UIApplication+sharedApplication].statusBarOrientation+==+++UIInterfaceOrientationPortraitUpsideDown))+?+[[UIScreen+mainScreen]+bounds].size.height+:+[[UIScreen+mainScreen]+bounds].size.width)|282247|使用示例：|282248|CGSize+calCulateSizze+;
calCulateSizze.width+=+SCREEN_WIDTH/2-8;
calCulateSizze.height+=+SCREEN_WIDTH/2-8;|282249|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

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

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

and "SCREEN_HEIGHT"

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

Example of using:

<pre><code>CGSize calCulateSizze ;
calCulateSizze.width = SCREEN_WIDTH/2-8;
calCulateSizze.height = SCREEN_WIDTH/2-8;
</code></pre>

blocks|key|3973616|text|下面是一种快速获取屏幕尺寸的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3973617|print(screenWidth)
print(screenHeight)

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
}|code-block|syntax|javascript|3973618|这些函数作为标准函数包含在：|3973619|https://github.com/goktugyil/EZSwiftExtensions|offset|length|3973620|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|1A|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|W|8|@]|9|@$K|X|L|Y|1|Z]]|A|$]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|J]]]]

Here is a Swift way to get screen sizes:

<pre><code>print(screenWidth)
print(screenHeight)

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
}
</code></pre>

These are included as a standard function in:

<a href="https://github.com/goktugyil/EZSwiftExtensions" rel="nofollow">https://github.com/goktugyil/EZSwiftExtensions</a>

blocks|key|1902926|text|CGFloat+width+=+[[UIScreen+mainScreen]+bounds].size.width;+CGFloat+height+=+[[UIScreen+mainScreen]bounds+].size.height;|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1902927|entityMap^0|0|3B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>CGFloat width = [[UIScreen mainScreen] bounds].size.width;
CGFloat height = [[UIScreen mainScreen]bounds ].size.height;</code>

blocks|key|282387|text|在这里，我更新了swift+3|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|282388|iOS+9中不推荐使用applicationFrame|282389|在swift+3中，它们删除了()，并且更改了一些命名约定，您可以在此处引用Link|282390|func+windowHeight()+->+CGFloat+{
++++return+UIScreen.main.bounds.size.height
}

func+windowWidth()+->+CGFloat+{
++++return+UIScreen.main.bounds.size.width
}|code-block|syntax|javascript|282391|entityMap|0|LINK|mutability|MUTABLE|url|http://ashishkakkad.com/2016/10/refined-api-naming-migrating-to-swift-3/^0|8|7|0|B|G|0|12|4|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|J|3|K|5|L|7|16|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

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 <a href="http://ashishkakkad.com/2016/10/refined-api-naming-migrating-to-swift-3/" rel="noreferrer">Link</a>

<pre><code>func windowHeight() -&gt; CGFloat {
 return UIScreen.main.bounds.size.height
}

func windowWidth() -&gt; CGFloat {
 return UIScreen.main.bounds.size.width
}
</code></pre>

blocks|key|282475|text|如果您希望屏幕宽度/高度与设备方向无关(适用于调整仅从横向启动的纵向视图控制器的大小)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|282476|CGFloat+screenWidthInPoints+=+[UIScreen+mainScreen].nativeBounds.size.width/[UIScreen+mainScreen].nativeScale;
CGFloat+screenHeightInPoints+=+[UIScreen+mainScreen].nativeBounds.size.height/[UIScreen+mainScreen].nativeScale;|code-block|syntax|javascript|282477|282478|+UIScreen+mainScreen.nativeBounds+<--来自文档-->物理屏幕的边界矩形，以像素为单位。此矩形以纵向向上的设备为基础。该值不会随着设备的旋转而改变。|blockquote|282479|282480|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|O|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|P|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Q|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

If you want screen width/height regardless of device orientation (good for sizing portrait only view controllers being launched from landscape orientations):

<pre><code>CGFloat screenWidthInPoints = [UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale;
CGFloat screenHeightInPoints = [UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale;
</code></pre>

<blockquote>
 [UIScreen mainScreen].nativeBounds &lt;-- From the docs --> The bounding rectangle of the physical screen, measured in pixels. This rectangle is based on the device in a portrait-up orientation. This value does not change as the device rotates.
</blockquote>

blocks|key|2298375|text|使用这些+Structs+来了解有关Swift+3.0中当前设备的有用信息|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|2298376|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)
++++
}|code-block|syntax|javascript|2298377|entityMap^0|0|4|5|7|D|E|5|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|W|8|@]|E|@]|F|$J|K]]|$1|L|3|-4|5|6|7|X|8|@]|E|@]|F|$]]]|M|$]]

Make use of these <code>Structs</code> to know useful info about the current device in Swift 3.0
<pre><code>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 &amp;&amp; ScreenSize.SCREEN_MAX_LENGTH &lt; 568.0
 static let IS_IPHONE_SE = UIDevice.current.userInterfaceIdiom == .phone &amp;&amp; ScreenSize.SCREEN_MAX_LENGTH == 568.0
 static let IS_IPHONE_7 = UIDevice.current.userInterfaceIdiom == .phone &amp;&amp; ScreenSize.SCREEN_MAX_LENGTH == 667.0
 static let IS_IPHONE_7PLUS = UIDevice.current.userInterfaceIdiom == .phone &amp;&amp; ScreenSize.SCREEN_MAX_LENGTH == 736.0
 static let IS_IPHONE_X = UIDevice.current.userInterfaceIdiom == .phone &amp;&amp; ScreenSize.SCREEN_MAX_LENGTH == 812.0
 static let IS_IPAD = UIDevice.current.userInterfaceIdiom == .pad &amp;&amp; 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 &gt;= 7.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 8.0)
 static let iOS8 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 8.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 9.0)
 static let iOS9 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 9.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 10.0)
 static let iOS10 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 10.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 11.0)
 static let iOS11 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 11.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 12.0)
 static let iOS12 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 12.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 13.0)
 static let iOS13 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 13.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 14.0)
 static let iOS14 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 14.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 15.0)
 static let iOS15 = (iOSVersion.SYS_VERSION_FLOAT &gt;= 15.0 &amp;&amp; iOSVersion.SYS_VERSION_FLOAT &lt; 16.0)
 
}
</code></pre>

blocks|key|282531|text|swift+3.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|282532|对于宽度|282533|UIScreen.main.bounds.size.width|code-block|syntax|javascript|282534|对于高度|282535|UIScreen.main.bounds.size.height|282536|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

swift 3.0

for width

<pre><code>UIScreen.main.bounds.size.width
</code></pre>

for height

<pre><code>UIScreen.main.bounds.size.height
</code></pre>

blocks|key|282569|text|现代的答案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|282570|如果你的应用程序支持iPad上的拆分视图，这个问题就会变得有点复杂。你需要窗口的大小，而不是屏幕的大小，它可能包含2个应用程序。窗口的大小在运行时也可能发生变化。|282571|使用应用程序的主窗口大小：|282572|UIApplication.shared.delegate?.window??.bounds.size+??+.zero|code-block|syntax|javascript|282573|注意:上述方法在启动时window成为key+window之前，可能会得到错误的值。如果你只需要宽度，下面的方法是非常推荐的|282574|UIApplication.shared.statusBarFrame.width|282575|282576|使用UIScreen.main.bounds的旧解决方案将返回设备的边界。如果你的应用程序运行在拆分视图模式下，它的尺寸是错误的。|offset|length|style|CODE|282577|当应用程序包含2个或更多窗口并且窗口较小时，最热门答案中的self.view.window可能会获得错误的大小。|282578|entityMap^0|0|0|0|0|0|0|0|2|K|0|T|G|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|13|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|14|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|16|8|@$R|17|S|18|T|U]]|9|@]|A|$]]|$1|V|3|W|5|6|7|19|8|@$R|1A|S|1B|T|U]]|9|@]|A|$]]|$1|X|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|Y|$]]

The modern answer:

if your app support split view on iPad, this problem becomes a little complicated. You need window's size, not the screen's, which may contain 2 apps. Window's size may also vary while running.

Use app's main window's size:

<pre><code>UIApplication.shared.delegate?.window??.bounds.size ?? .zero
</code></pre>

Note: The method above may get wrong value before window becoming key window when starting up. if you only need width, method below is very recommended:

<pre><code>UIApplication.shared.statusBarFrame.width
</code></pre>

<hr>

The old solution using <code>UIScreen.main.bounds</code> will return the device's bounds. If your app running in split view mode, it get the wrong dimensions. 

<code>self.view.window</code> in the hottest answer may get wrong size when app contains 2 or more windows and the window have small size.

blocks|key|3973888|text|对于iPad拆分窗口，[[UIScreen+mainScreen]+bounds]不起作用，请改用[UIApplication+sharedApplication].delegate.window.bounds。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3973889|entityMap^0|B|U|1D|1K|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

For iPad split window, the <code>[[UIScreen mainScreen] bounds]</code> doesn't work, use <code>[UIApplication sharedApplication].delegate.window.bounds</code> instead.

blocks|key|1903234|text|iOS+13%2B+answer+(source+of+the+code+finding+the+key+window)：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1903235|guard+let+window+=+UIApplication.shared.windows.first(where:+{+$0.isKeyWindow+})+else+{
++++return
}

let+windowWidth+=+window.frame.width
let+windowHeight+=+window.frame.height|code-block|syntax|javascript|1903236|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/63660485/3151675^0|G|15|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

iOS 13+ answer (<a href="https://stackoverflow.com/a/63660485/3151675">source of the code finding the key window</a>):
<pre><code>guard let window = UIApplication.shared.windows.first(where: { $0.isKeyWindow }) else {
 return
}

let windowWidth = window.frame.width
let windowHeight = window.frame.height
</code></pre>

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

Currently, I use:

<pre><code>lCurrentWidth = self.view.frame.size.width;
lCurrentHeight = self.view.frame.size.height;
</code></pre>

in <code>viewWillAppear:</code> and <code>willAnimateRotationToInterfaceOrientation:duration:</code>

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

How to get the screen width and height in iOS?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何在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willAnimateRotationToInterfaceOri...

问如何在iOS中获取屏幕的宽度和高度？
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问如何在iOS中获取屏幕的宽度和高度？EN