IOS イメージサイス整理

Application icon (in pixels)
iPad:72x72
iPad Retina:144x144
iPhone:57x57
iPhone Retina:114x114

Launch image (in pixels)
iPad:768 x 1004 (portrait) 1024 x 748 (landscape)
iPad Retina:1536 x 2008 (portrait) 2048 x 1496 (landscape)
iPhone:320 x 480
iPhone Retina:640 x 960

Tab bar icon (in pixels)
iPad:Approximately 30 x 30
iPad Retina:Approximately 60 x 60
iPhone:Approximately 30 x 30
iPhone Retina:Approximately 60 x 60

Toolbar and navigation bar icon (in pixels)
iPad:Approximately 20 x 20
iPad Retina:Approximately 40 x 40
iPhone:Approximately 20 x 20
iPhone Retina:Approximately 40 x 40