有时候(对于预storyboard应用程序)，如果布局会有足够的不同，在viewController init中根据设备指定不同的xib是值得的(参见这个问题-你需要修改代码来处理iPhone 5)，因为如果你需要不同的图形，再多的自动调整蒙版也不会起作用。

-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

    NSString *myNibName;
    if ([MyDeviceInfoUtility isiPhone5]) myNibName = @"MyNibIP5";
    else myNibName = @"MyNib";

    if ((self = [super initWithNibName:myNibName bundle:nibBundleOrNil])) {


...

这对于针对旧iOS版本的应用程序非常有用。

Download and install latest version of Xcode. Set a Launch Screen File for your app (in the general tab of your target settings). This is how you get to use the full size of any screen, including iPad split view sizes in iOS 9. Test your app, and hopefully do nothing else, since everything should work magically if you had set auto resizing masks properly, or used Auto Layout. If you didn't, adjust your view layouts, preferably with Auto Layout. If there is something you have to do for the larger screens specifically, then it looks like you have to check height of [[UIScreen mainScreen] bounds] as there seems to be no specific API for that. As of iOS 8 there are also size classes that abstract screen sizes into regular or compact vertically and horizontally and are recommended way to adapt your UI.

唯一真正需要做的事情是在应用程序资源中添加一个名为“Default-568h@2x.png”的启动图像，在一般情况下(如果你足够幸运)应用程序将正常工作。

如果应用程序不处理触摸事件，那么确保键窗口有适当的大小。解决方法是设置适当的框架:

[window setFrame:[[UIScreen mainScreen] bounds]]

在迁移到iOS 6时，还有其他与屏幕大小无关的问题。详情请阅读iOS 6.0发布说明。

在iOS设备和iOS模拟器上测试时，有一个小问题。看起来模拟器(XCode 6.0.1)在[[UIScreen mainScreen] bounds]中给出了宽度和高度的切换值。大小，取决于设备方向。

因此，在确定正确的物理屏幕尺寸时，这可能是一个问题。此代码还有助于区分所有2014年。iPhone型号:

iPhone4s iPhone5(和iPhone5s) iPhone6(及iPhone6+)

它也可以很容易地改变，使区别，如iPhone6从iPhone6+。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    CGSize iOSDeviceScreenSize = [[UIScreen mainScreen] bounds].size;

    if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone)
    {
        if (iOSDeviceScreenSize.width > 568 || // for iOS devices
            iOSDeviceScreenSize.height > 568) // for iOS simulator
        {   // iPhone 6 and iPhone 6+

            // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone6
            storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone6" bundle:nil];

            NSLog(@"loaded iPhone6 Storyboard");
        }
        else if (iOSDeviceScreenSize.width == 568 || // for iOS devices
                 iOSDeviceScreenSize.height == 568) // for iOS simulator
        {   // iPhone 5 and iPod Touch 5th generation: 4 inch screen (diagonally measured)

            // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone5
            storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone5" bundle:nil];

            NSLog(@"loaded iPhone5 Storyboard");
        }
        else
        {   // iPhone 3GS, 4, and 4S and iPod Touch 3rd and 4th generation: 3.5 inch screen (diagonally measured)

                // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone4
            storyboard = [UIStoryboard story    boardWithName:@"MainStoryboard_iPhone" bundle:nil];

                NSLog(@"loaded iPhone4 Storyboard");
        }
    }
    else if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
    {   // The iOS device = iPad

        storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPadnew" bundle:nil];

        NSLog(@"loaded iPad Storyboard");
    }

    // rest my code
}

在横屏模式下，使用568检查边界将失败。iPhone 5只在纵向模式下启动，但如果你想支持旋转，那么iPhone 5的“check”也需要处理这种情况。

这是一个宏，它处理方向状态:

#define IS_IPHONE_5 (CGSizeEqualToSize([[UIScreen mainScreen] preferredMode].size, CGSizeMake(640, 1136)))

'preferredMode'调用的使用来自我几个小时前读的另一篇文章，所以我没有想到这个想法。

我解决了这个问题。只需要在图像中添加~568h@2x后缀，在xib的图像中添加~568h。不需要更多的运行时检查或代码更改。