iPhone 设备：

iPhone 1G --- 320x480
iPhone 3G --- 320x480
iPhone 3GS --- 320x480
iPhone 4 --- 640x960
iPhone 4S --- 640x960
iPhone 5 --- 640x1136
iPhone 5S --- 640x1136
iPhone 5C --- 640x1136
iPhone 6 --- 750x1334
iPhone 6 Plus --- 1080x1920 （开发应按照1242x2208适配）
iPhone 6S --- 750x1334
iPhone 6S Plus --- 1080x1920 （开发应按照1242x2208适配）

iPod Touch:

iPod Touch 1G --- 320x480
iPod Touch 2G --- 320x480
iPod Touch 3G --- 320x480
iPod Touch 4G --- 640x960
iPod Touch 5G --- 640x1136

iphone界面的尺寸.png

图标icon 的尺寸：

iPhone的icon.png

iPad:

iPad 1 --- 1024x768
iPad 2 --- 1024x768
The New iPad --- 2048x1536
iPad mini --- 1024x768
iPad 4 --- 2048x1536
iPad Air --- 2048x1536
iPad mini 2 --- 2048x1536
iPad Air 2 --- 2048x1536
iPad mini 3 --- 2048x1536
iPad mini 4 --- 2048x1536
iPad Pro --- 2732x2048

ipad图标尺寸.png