iOS App Icon Sizes

logo 图标尺寸

设备	Icon 尺寸
iPhone	180px × 180px (60pt × 60pt @3x)
120px × 120px (60pt × 60pt @2x)
iPad Pro	167px × 167px (83.5pt × 83.5pt @2x)
iPad, iPad mini	152px × 152px (76pt × 76pt @2x)
App Store	1024px × 1024px

Spotlight, Settings, 和 Notification 图标

Device	Spotlight 图标大小
iPhone	120px × 120px (40pt × 40pt @3x)
80px × 80px (40pt × 40pt @2x)
iPad Pro, iPad, iPad mini	80px × 80px (40pt × 40pt @2x)

Device	Settings 图标大小
iPhone	87px × 87px (29pt × 29pt @3x)
58px × 58px (29pt × 29pt @2x)
iPad Pro, iPad, iPad mini	58px × 58px (29pt × 29pt @2x)

Device	Notification 图标大小
iPhone	60px × 60px (20pt × 20pt @3x)
40px × 40px (20pt × 20pt @2x)
iPad Pro, iPad, iPad mini	40px × 40px (20pt × 20pt @2x)

官网参考文档地址：https://developer.apple.com/ios/human-interface-guidelines/graphics/app-icon/