关于在 iPhone/iPad 上使用横向模式和自定义图像的问题
嘿，我只是有一个关于为应用程序实现横向模式的简单问题，特别是在 iPad 上运行（但我确信这个概念也适用于 iPhone）。我有一个自定义背景图像，我想将其用于我的根视图。我设计了图像，使其适合纵向模式下的 iPad 屏幕尺寸。我是否需要为横向模式设计第二张图像以使其正确适合？这就是横向/纵向过渡的工作原理，在两个不同的图像之间切换吗？我真的不知道，所以任何帮助将不胜感激。谢谢！
Hey I just had a simple question about implementing landscape mode for an app, particularly running on the iPad (but I am sure the concept holds true for the iPhone). I have a custom background image that I am wanting to use for my root view. I designed the image so that it fits the iPad screen size for portrait mode. Do I need to design a second image for landscape mode so that it fits correctly? Is that how the landscape/portrait transition works, switching between two different images? I really don't have any idea, so any help would be appreciated. Thanks!
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另一件需要考虑的事情是 UIImage 类有
stretchableImageWithLeftCapWidth:topCapHeight: 方法来获取现有图像，并构建一个新图像，该新图像可以通过仅重复图像的中心部分来调整为任何大小并将图像的角点保留为固定图像片段。您可以加载固定的 UIImage，使用此方法生成可拉伸的副本，并将其分配给 UIImageView - 然后，当您由于旋转而调整 UIImageView 的大小时，图像将根据需要进行调整，而不是重新采样图像。
One other thing to think about is that the UIImage class has
stretchableImageWithLeftCapWidth:topCapHeight: method to take an existing image, and build a new image that can adjust to any size by repeating only the central portion of the image and leaving the corners of the image as fixed image segments.You can load in a fixed UIImage, generate a stretchable copy using this method, and assign it to a UIImageView - then as you resize the UIImageView due to rotation, the image will adjust as needed and not resample the image.
假设您有一个 UIImageView 作为背景，请在设备方向更改后更改其图像属性。
请参阅 http://developer 中的处理视图旋转.apple.com/iphone/library/documentation/UIKit/Reference/UIViewController_Class/Reference/Reference.html
Assuming you have a UIImageView as your backdrop, change its image property after the device orientation changes.
See Handling View Rotations in http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIViewController_Class/Reference/Reference.html