iphone 图标尺寸

57x57

Icon.png

App Store and Home screen on iPhone/iPod touch

Required

114x114

Icon@2x.png

Home screen for iPhone 4 High Resolution

Optional but recommended

72x72

Icon-72.png

Home screen for iPad compatibility

Optional but recommended

29x29

Icon-Small.png

Spotlight and Settings

Optional but recommended

50x50

Icon-Small-50.png

Spotlight for iPad compatibility

Recommended if you have a Settings bundle, otherwise optional but recommended

58x58

Icon-Small@2x.png

Spotlight and Settings for iPhone 4 High Resolution

Recommended if you have a Settings bundle, otherwise optional but recommended

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link:http://developer.apple.com/library/ios/#qa/qa1686/_index.html