支持iOS 6和iOS 5自动旋转

Can anyone confirm that to support both iOS 6 and iOS 5 there is no point to adding the new iOS 6 autorotation methods, since the Apple docs suggest that these methods are completely ignored if you are also implementing the iOS 5 methods?

任何人都可以确认，为了支持iOS 6和iOS 5，没有必要添加新的iOS 6自动旋转方法，因为如果您还在实施iOS 5方法，那么Apple文档会建议完全忽略这些方法吗？

In particular, I talking about the methods - (NSUInteger)supportedInterfaceOrientations and - (BOOL) shouldAutorotate -- that these are ignored and synthesized by the compiler if you also implement the - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

特别是，我在谈论方法 - （NSUInteger）supportedInterfaceOrientations和 - （BOOL）shouldAutorotate - 如果你也实现了 - （BOOL）shouldAutorotateToInterfaceOrientation：（UIInterfaceOrientation）interfaceOrientation，这些被编译器忽略和合成

6 个解决方案

#1

You need to add new callback for autorotation if you are packaging your app in the new sdk. However, these callbacks will be received only when such an app is run on iOS 6 devices. For devices running on earlier iOS versions, earlier callbacks would be received. If you dont implement the new callbacks, the default behavior is that your app runs on all orientation on iPad and all except UpsideDown orientation on iPhone.

如果要在新的sdk中打包应用程序，则需要为自动旋转添加新的回调。但是，只有在iOS 6设备上运行此类应用程序时才会收到这些回调。对于在早期iOS版本上运行的设备，将收到早期的回调。如果你没有实现新的回调，默认行为是你的应用程序在iPad上的所有方向上运行，除了iPhone上的UpsideDown方向以外的所有方向。

#2

For iOS5 Rotation. Check for your desired orientation and return YES

对于iOS5旋转。检查所需的方向并返回YES

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{  
    if ((interfaceOrientation==UIInterfaceOrientationPortrait)||(interfaceOrientation==UIInterfaceOrientationPortraitUpsideDown)) {
        return YES;
    }
    else return NO;
}

iOS 6.0 Autorotation Support

iOS 6.0自动旋转支持

- (BOOL)shouldAutorotate
{
    return NO;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationIsPortrait(UIInterfaceOrientationMaskPortrait|| UIInterfaceOrientationMaskPortraitUpsideDown);

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationIsPortrait(UIInterfaceOrientationPortrait|| UIInterfaceOrientationPortraitUpsideDown);

}

#3

 - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationMaskAll;
}

-(void)viewWillLayoutSubviews
{
if([self interfaceOrientation] == UIInterfaceOrientationPortrait||[self interfaceOrientation] ==UIInterfaceOrientationPortraitUpsideDown)
    {
       if (screenBounds.size.height == 568)
        {
          //set the frames for 4"(IOS6) screen here
         }
        else

        {
         ////set the frames for 3.5"(IOS5/IOS6) screen here
        }

}
        else if ([self interfaceOrientation] == UIInterfaceOrientationLandscapeLeft||[self interfaceOrientation] == UIInterfaceOrientationLandscapeRight)
        {
         if (screenBounds.size.height == 568)
        {
          //set the frames for 4"(IOS6) screen here
         }
        else

        {
         ////set the frames for 3.5"(IOS5/IOS6) screen here
        }


    }
//it is for IOS5
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
     return YES;
    }

-(void)viewWillLayoutSubviews this method will call for ios5/ios6. this code is usefull to both ios6/ios5/ios6 with 3.5" screen/4" screen with ios6.

- （void）viewWillLayoutSubviews此方法将调用ios5 / ios6。此代码对ios6 / ios5 / ios6以及带有ios6的3.5英寸屏幕/ 4英寸屏幕都很有用。

#4

I think the most elegant solution is:

我认为最优雅的解决方案是：

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return ((1 << toInterfaceOrientation) & self.supportedInterfaceOrientations) != 0;
}

Do I miss something?

我错过了什么吗？

#5

You have to set a flag somewhere (I believe in your Info.plist) that indicates which of the two you use. If you use the new one, you can't build for iOS 5 (or at least, it won't work on iOS 5). If you use the old one, the new methods aren't being called. So yeah, you pretty much have to choose which method(s) you want to use, and if you want to support iOS 5, you cannot use the new methods.

你必须在某个地方设置一个标志（我相信你的Info.plist），它指示你使用的两个中的哪一个。如果您使用新的，则无法为iOS 5构建（或者至少，它不能在iOS 5上运行）。如果使用旧方法，则不会调用新方法。所以，是的，您几乎必须选择要使用的方法，如果您想支持iOS 5，则无法使用新方法。

#6

to support autorotations in both ios5 and ios6 we need to provide call backs in case of ios6....

为了支持ios5和ios6中的自动旋转，我们需要在ios6的情况下提供回调....

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

and we need to call

我们需要打电话

- (NSUInteger)supportedInterfaceOrientations {
return UIInterfaceOrientationMaskPortrait;

} 

-(BOOL)shouldAutoRotate{
    return YES;
  }

for ios5

对于ios5

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return ((toInterfaceOrientation == UIInterfaceOrientationPortrait) || (toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown));
}

#1

#2