iPhone 高分辨率背景：操作方法和来源
实现类似于 PPD 临床试验移动应用程序（允许搜索临床试验）的外观和感觉的最佳方法是什么，他们似乎已经实现了 UINavigationController 和 UITabBar 控制器作为主窗口和高分辨率背景上的覆盖。
另外，作为此问题的后续内容，是否有任何地方有一些库存 iPhone 4 图形（按钮、图标） ，尤其是背景）可以用来模拟东西？
编辑0：顺便说一句，我不知道他们在底部使用了 UITabBarController，但从所有迹象来看，他们确实在顶部使用了 UINavigationController。它的行为正如您所期望的那样。
What is the best way to implement a look and feel similar to the PPD Clinical Trials Mobile app (allows search for clinical trials) where it appears they have implemented a UINavigationController and UITabBar controller as overlays over the MainWindow and a high res background.
Also as a follow up to this question is there anywhere that has some stock iPhone 4 graphics (buttons, icons, and especially backgrounds) that can be used for mocking stuff up?
EDIT 0: By the way, I don't know that they use a UITabBarController for the bottom, but from all indications they do use a UINavigationController up top. It behaves as you would expect.
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在我看来，PPD 临床试验移动应用程序由以下元素组成：
背景顶部的模态视图控制器；
模态视图控制器的框架小于屏幕尺寸；
模态视图控制器包含一个 UINavigationController；
通过将模态视图控制器内视图的
alpha属性设置为低于 1.0（这意味着不透明）来获得透明度效果。It seems to me that the PPD Clinical Trials Mobile app is composed of the following elements:
a modal view controller on top of the background;
the modal view controller has got a frame smaller than the screen size;
the modal view controller contains a UINavigationController;
the effect of transparency is obtained by setting the
alphaproperty of the views inside the modal view controller to something below 1.0 (which means opaque).库存图形/组件：
http://spoiledmilk.dk/blog/iphone-ui-design
http://www.teehanlax.com/blog/iphone-gui-psd-30/
图标集：
http://glyphish.com/
至于截图，我想你可以通过以下方式完成它的内容：
背景：静态图像，在 Photoshop 或类似工具中创建（pixlr.com 为一个伟大的免费在线替代方案）
导航栏：覆盖默认的 UINavigationBar 并以不同的方式设置组件的框架。
>
选择菜单：再次覆盖默认类对象。
希望这对您有所帮助！
Stock graphics/components:
http://spoiledmilk.dk/blog/iphone-ui-design
http://www.teehanlax.com/blog/iphone-gui-psd-30/
Icon sets:
http://glyphish.com/
As for the screenshot, I reckon you could accomplish it's contents in the following way:
Background: Static image, created in Photoshop or similar (pixlr.com as a great free online alternative)
Navigation bar: Overridden the default UINavigationBar and set the frames of the components differently.
Selection menus: Overridden default class objects again.
Hope this was of some help!