blocks|key|1263809|text|方向信息不是很一致，有几种方法。如果在视图控制器中，则可以使用interfaceOrientation属性。在其他地方，您可以呼叫：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1263810|[[UIDevice+currentDevice]+orientation]|code-block|syntax|javascript|1263811|或者，您可以请求接收方向更改通知：|1263812|[[UIDevice+currentDevice]+beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter+defaultCenter]+addObserver:self+selector:@selector(orientationChanged:)+name:UIDeviceOrientationDidChangeNotification+object:nil];|1263813|有些人还喜欢检查状态栏的方向：|1263814|[UIApplication+sharedApplication].statusBarOrientation|1263815|entityMap^0|V|K|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|T|$]]

Orientation information isn't very consistent, and there are several approaches. If in a view controller, you can use the <code>interfaceOrientation</code> property. From other places you can call:

<pre><code>[[UIDevice currentDevice] orientation]
</code></pre>

Alternatively, you can request to receive orientation change notifications:

<pre><code>[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil];
</code></pre>

Some people also like to check the status bar orientation:

<pre><code>[UIApplication sharedApplication].statusBarOrientation
</code></pre>

blocks|key|1263900|text|我找到了一个解决FaceUp定向问题的技巧！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1263901|将方向检查推迟到应用程序开始运行之后，然后设置变量、视图大小等。！|1263902|//CODE

-+(void)viewDidLoad+{

++[super+viewDidLoad];

++//DELAY
++[NSTimer+scheduledTimerWithTimeInterval:0.5+
+++++++++++++++++++++target:self+
+++++++++++++++++++++selector:@selector(delayedCheck)+
+++++++++++++++++++++userInfo:nil+
+++++++++++++++++++++repeats:NO];

}


-(void)delayedCheck{

++//DETERMINE+ORIENTATION
++if(+[UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationPortrait+){
++++++FACING+=+@"PU";
++}
++if(+[UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationPortraitUpsideDown+){
++++++FACING+=+@"PD";
++}
++if(+[UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationLandscapeLeft+){
++++++FACING+=+@"LL";
++}
++if(+[UIApplication+sharedApplication].statusBarOrientation+==+UIInterfaceOrientationLandscapeRight+){
++++++FACING+=+@"LR";
++}+
++//DETERMINE+ORIENTATION

++//START
++[self+setStuff];
++//START

}


-(void)setStuff{

++if(+FACING+==+@"PU"+){
++++++++++//logic+for+Portrait
++}
++else
++if(+FACING+==+@"PD"+){
++++++++++//logic+for+PortraitUpsideDown
++}
++else{+
++if(+FACING+==+@"LL"){
++++++++++//logic+for+LandscapeLeft
++}
++else
++if(+FACING+==+@"LR"+){
++++++++++//logic+for+LandscapeRight
++}

}

//CODE|code-block|syntax|javascript|1263903|您可以在'setStuff‘函数中使用addSubviews、position元素等...任何最初取决于方向的内容！|1263904|:D|1263905|-Chris+Allinson|1263906|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I found a trick to solve the FaceUp orientation issue!!!

Delay the orientation check till AFTER the app has started running, then set variables, view sizes, etc.!!!

<pre><code>//CODE

- (void)viewDidLoad {

 [super viewDidLoad];

 //DELAY
 [NSTimer scheduledTimerWithTimeInterval:0.5 
 target:self 
 selector:@selector(delayedCheck) 
 userInfo:nil 
 repeats:NO];

}


-(void)delayedCheck{

 //DETERMINE ORIENTATION
 if( [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait ){
 FACING = @"PU";
 }
 if( [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown ){
 FACING = @"PD";
 }
 if( [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeLeft ){
 FACING = @"LL";
 }
 if( [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeRight ){
 FACING = @"LR";
 } 
 //DETERMINE ORIENTATION

 //START
 [self setStuff];
 //START

}


-(void)setStuff{

 if( FACING == @"PU" ){
 //logic for Portrait
 }
 else
 if( FACING == @"PD" ){
 //logic for PortraitUpsideDown
 }
 else{ 
 if( FACING == @"LL"){
 //logic for LandscapeLeft
 }
 else
 if( FACING == @"LR" ){
 //logic for LandscapeRight
 }

}

//CODE
</code></pre>

You can addSubviews, position elements, etc. in the 'setStuff' function ... anything that would initially depend on the orientation!!!

:D

-Chris Allinson

blocks|key|1263952|text|我认为|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1263953|[[UIDevice+currentDevice]+orientation];|code-block|syntax|javascript|1263954|并不是真的可靠。有时候管用，有时候不行...在我的应用程序中，我使用|1263955|[[UIApplication+sharedApplication]statusBarOrientation];+|1263956|而且它工作得很好！|1263957|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I think 

<pre><code>[[UIDevice currentDevice] orientation];
</code></pre>

is not really reliable. Sometimes it works, sometimes not... In my apps, I use 

<pre><code>[[UIApplication sharedApplication]statusBarOrientation]; 
</code></pre>

and it works great!

blocks|key|1049352|text|我不知道为什么，但每次我的应用程序启动时，前4个是正确的，但随后我得到了相反的方向。我使用一个静态变量来计算这个值，然后用一个BOOL来改变我手动发送这个值到子视图的方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1049353|因此，虽然我不会添加新的独立答案，但我要说的是使用上面的方法并记住这一点。注意:我正在接收状态栏方向，因为它是应用程序启动时唯一会调用的东西，并且“足够正确”来帮助我移动东西。|1049354|使用它的主要问题是视图的延迟加载。确保“在”设置它们的位置以响应它们的方向之前调用包含的和子视图的view属性。感谢Apple在我们设置不存在的变量时没有崩溃，迫使我们记住它们破坏了OO，并迫使我们也这么做……啊，如此优雅的系统却如此破碎！说真的，我喜欢Native，但它就是不好，鼓励糟糕的OO设计。这不是我们的错，只是提醒一下您的调整大小函数可能正在工作，但Apple的方式要求您通过使用来加载视图，而不是通过创建和初始化它|1049355|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I don't know why, but every time my app starts, the first 4 are right, but subsequently I get the opposite orientation. I use a static variable to count this, then have a BOOL to flip how I manually send this to subviews.

So while I'm not adding a new stand-alone answer, I'm saying use the above and keep this in mind. Note: I'm receiving the status bar orientation, as it's the only thing that gets called when the app starts and is "right enough" to help me move stuff.

The main problem with using this is the views being lazily loaded. Be sure to call the view property of your contained and subviews "Before" you set their positions in response to their orientation. Thank Apple for not crashing when we set variables that don't exist, forcing us to remember they break OO and force us to do it, too... gah, such an elegant system yet so broken! Seriously, I love Native, but it's just not good, encourages poor OO design. Not our fault, just reminding that your resize function might be working, but Apple's Way requires you load the view by use, not by creating and initializing it

blocks|key|1049405|text|对于确定横向与纵向，有一个内置的函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1049406|UIInterfaceOrientation+orientation+=+[[UIDevice+currentDevice]+orientation];
BOOL+inLandscape+=+UIDeviceOrientationIsLandscape(orientation);|code-block|syntax|javascript|1049407|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|$]]

For determining landscape vs portrait, there is a built-in function:

<pre><code>UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
BOOL inLandscape = UIDeviceOrientationIsLandscape(orientation);
</code></pre>

blocks|key|1049484|text|您可以通过两种方式实现此目的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1049485|1-使用以下方法：|1049486|**在-(void)viewDidLoad方法中放入以下行：|offset|length|style|CODE|1049487|[[NSNotificationCenter+defaultCenter]+addObserver:self+selector:@selector(deviceRotated:)+name:UIDeviceOrientationDidChangeNotification+object:nil];|code-block|syntax|javascript|1049488|然后将此方法放入您的类中|1049489|-(void)deviceRotated:(NSNotification*)notification
{

+++UIInterfaceOrientation+orientation+=+[[UIApplication+sharedApplication]+statusBarOrientation];
++++if(orientation+==+UIInterfaceOrientationLandscapeLeft+%7C%7C+orientation+==+UIInterfaceOrientationLandscapeRight)
++++{
++++++++//Do+your+textField+animation+here
++++}
}|1049490|上面的方法将检查设备旋转时的方向|1049491|2-第二种方式是在-(void)viewDidLoad中插入以下通知|1049492|[[NSNotificationCenter+defaultCenter]+addObserver:self+selector:@selector(checkRotation:)+name:UIApplicationDidChangeStatusBarOrientationNotification+object:nil];|1049493|然后将以下方法放入类中|1049494|-(void)checkRotation:(NSNotification*)notification
{
++++UIInterfaceOrientation+orientation+=+[UIApplication+sharedApplication].statusBarOrientation;
++++if(orientation+==+UIInterfaceOrientationLandscapeLeft+%7C%7C+orientation+==+UIInterfaceOrientationLandscapeRight)
++++{
+++++++++//Do+your+textField+animation+here
++++}
}|1049495|上面的方法将检查ipad或iPhone的状态栏的方向，并根据它使您的动画在所需的方向。|1049496|entityMap^0|0|0|3|I|0|0|0|0|0|9|I|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|18|8|@$F|19|G|1A|H|I]]|9|@]|A|$]]|$1|J|3|K|5|L|7|1B|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|1D|8|@]|9|@]|A|$M|N]]|$1|S|3|T|5|6|7|1E|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1F|8|@$F|1G|G|1H|H|I]]|9|@]|A|$]]|$1|W|3|X|5|L|7|1I|8|@]|9|@]|A|$M|N]]|$1|Y|3|Z|5|6|7|1J|8|@]|9|@]|A|$]]|$1|10|3|11|5|L|7|1K|8|@]|9|@]|A|$M|N]]|$1|12|3|13|5|6|7|1L|8|@]|9|@]|A|$]]|$1|14|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|15|$]]

You can achieve this by two ways:

1- By using the following method:

**Put the following line in the <code>-(void)viewDidLoad</code> Method:

<pre><code>[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceRotated:) name:UIDeviceOrientationDidChangeNotification object:nil];
</code></pre>

then put this method inside your class

<pre><code>-(void)deviceRotated:(NSNotification*)notification
{

 UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
 if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
 {
 //Do your textField animation here
 }
}
</code></pre>

The above method will check the orientation when the device will be rotated

2- The second way is by inserting the following notification inside <code>-(void)viewDidLoad</code>

<pre><code>[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkRotation:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
</code></pre>

then put the following method inside your class

<pre><code>-(void)checkRotation:(NSNotification*)notification
{
 UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
 if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
 {
 //Do your textField animation here
 }
}
</code></pre>

The above method will check the orientation of the status bar of the ipad or iPhone and according to it you make do your animation in the required orientation.

blocks|key|1049533|text|在视图控制器中，获取self.interfaceOrientation的只读值(接口的当前方向)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1049534|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In your view controller, get the read-only value of self.interfaceOrientation (the current orientation of the interface).

blocks|key|1049569|text|在iPad中，[UIApplication+sharedApplication].statusBarOrientation在横屏时返回肖像，在发布时返回横屏|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1049570|entityMap^0|7|1I|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>[UIApplication sharedApplication].statusBarOrientation</code> returns portrait when it's landscape, and landscape when it's portrait at launch, in iPad

blocks|key|1049605|text|我尝试了上面的许多方法，但似乎没有一种方法对我来说是100%25有效的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1049606|我的解决方案是在Root+View+Controller中创建一个类型为UIInterfaceOrientation的名为orientation的iVar。|1049607|-+(void)viewDidLoad+{

++++[super+viewDidLoad];
++++orientation+=+self.interfaceOrientation;+//+this+is+accurate+in+iOS+6+at+this+point+but+not+iOS+5;+iOS+5+always+returns+portrait+on+app+launch+through+viewDidLoad+and+viewWillAppear+no+matter+which+technique+you+use.
}


-+(BOOL)+shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
++++return+YES;
}

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation+duration:(NSTimeInterval)duration{

++++orientation+=++toInterfaceOrientation;

}|code-block|syntax|javascript|1049608|然后，在任何你需要检查方向的地方，你可以这样做：|1049609|+if(UIInterfaceOrientationIsPortrait(orientation)){
++++//+portrait
++}else{
+++//+landscape
++}|1049610|也许还有一种更好的方法，但这种方法似乎在98%25的时间内都有效(尽管是iOS5)，而且也不是太难。请注意，iOS5总是在纵向视图中启动iPad，然后向设备发送will+willRotateTo和didRotateFromInterfaceOrientation:消息，因此该值仍然会短暂地不准确。|1049611|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I've tried many of the above methods, but nothing seemed to work 100% for me.

My solution was to make an iVar called orientation of type UIInterfaceOrientation in the Root View Controller.

<pre><code>- (void)viewDidLoad {

 [super viewDidLoad];
 orientation = self.interfaceOrientation; // this is accurate in iOS 6 at this point but not iOS 5; iOS 5 always returns portrait on app launch through viewDidLoad and viewWillAppear no matter which technique you use.
}


- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
 return YES;
}

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{

 orientation = toInterfaceOrientation;

}
</code></pre>

Then, any place where you need to check the orientation you can do something like this:

<pre><code> if(UIInterfaceOrientationIsPortrait(orientation)){
 // portrait
 }else{
 // landscape
 }
</code></pre>

There may still be a better way, but this seems to work 98% of the time (iOS5 notwithstanding) and isn't too hard. Note that iOS5 always launches iPad in portrait view, then sends a device the willRotateTo- and didRotateFromInterfaceOrientation: messages, so the value will still be inaccurate briefly.

In a given event handler (not the "shouldAutorotateToInterfaceOrientation" method) how do I detect the current iPad orientation? I have a text field I have to animate up (when keyboard appears) in the Landscape view, but not in the portrait view and want to know which orientation I'm in to see if the animation is necessary.

Get current orientation of iPad?

在给定的事件处理程序(不是"shouldAutorotateToInterfaceOrientation“方法)中，如何检测当前的iPad方向？我有一个文本字段，我必须在横向视图中设置动画(当键盘出现时)，而不是在纵向视图中，并且想知道我所在的方向，以查看动画是否必要。

问是否获取iPad的当前方向？
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