关于appicon 大小和启动页大小的设置

最新的参考apple官网地址：https://developer.apple.com/library/ios/qa/qa1686/_index.html，网页下面有详细的使用方法（ios7以后的）

Table 1  iPhone-only app icon requirements.

Image Size (px)	File Name	Used For	App Store	Ad Hoc
512x512	iTunesArtwork	App list in iTunes	Do not include	Optional but recommended
1024x1024	iTunesArtwork@2x	App list in iTunes on devices with retina display	Do not include	Optional but recommended
120x120	Icon-60@2x.png	Home screen on iPhone/iPod Touch with retina display	Required	Required
76x76	Icon-76.png	Home screen on iPad	Optional but recommended	Optional but recommended
152x152	Icon-76@2x.png	Home screen on iPad with retina display	Optional but recommended	Optional but recommended
40x40	Icon-Small-40.png	Spotlight	Optional but recommended	Optional but recommended
80x80	Icon-Small-40@2x.png	Spotlight on devices with retina display	Optional but recommended	Optional but recommended
29x29	Icon-Small.png	Settings	Recommended if you have a Settings bundle, optional otherwise	Recommended if you have a Settings bundle, optional otherwise
58x58	Icon-Small@2x.png	Settings on devices with retina display	Recommended if you have a Settings bundle, optional otherwise	Recommended if you have a Settings bundle, optional otherwise

另外还有个启动画面的大小：
https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/LaunchImages.html
和这里：https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/App-RelatedResources/App-RelatedResources.html#//apple_ref/doc/uid/TP40007072-CH6-SW12

Table 5-4  Typical launch image dimensions

Device	Portrait	Landscape
iPhone and iPod touch	320 x 480 pixels 640 x 960 pixels ( @2x )	Not supported
iPhone 5 and iPod touch (5th generation)	640 x 1136 pixels ( @2x )	Not supported
iPad	768 x 1024 pixels 1536 x 2048 pixels ( @2x )	1024 x 768 pixels 2048 x 1536 pixels ( @2x )

这个不需要默认文件名称，直接在xcode5中拖过去LaunchImage的编辑画面即可。

这里有介绍Images.xcassets资源的，图文并茂：http://blog.csdn.net/liufan321/article/details/9121241

如果全屏启动的时候你会发现状态栏也在，可能拦到画面会比较丑。那么可以在app启动时把状态栏隐藏掉，点击 工程名字->Info，然后鼠标放到Custom iOS Target Properties其中一行，这时右边会出来一个+号，点击+号新增一行，选择Status bar is initially hidden = YES，这样启动时状态栏就隐藏啦！