IOS App Icon Size 图标尺寸 LaunchImage iPhone Portrait 启动画面大小 Image资源使用
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）
| 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
| Device | Portrait | Landscape |
|---|---|---|
| iPhone and iPod touch | 320 x 480 pixels 640 x 960 pixels ( | Not supported |
| iPhone 5 and iPod touch (5th generation) | 640 x 1136 pixels ( | Not supported |
| iPad | 768 x 1024 pixels 1536 x 2048 pixels ( | 1024 x 768 pixels 2048 x 1536 pixels ( |
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！