由于开拓的时候总是记不住各个设备屏幕尺寸对应的像素，特此在苹果开拓者文档大将这些记录了下来，利便查阅. Screenshot Properties
Device
Specifications
Editable
3.5-Inch Retina Display Screenshots(required)
One screenshot is required. Up to four additional screenshots can be uploaded. You can rearrange the screenshots when you create or edit the iTunes Connect record.
Don’t include the device status bar in your screenshots. Screenshot requirements are:
72 dpi, RGB, flattened, no transparency
High-quality JPEG or PNG image file format
Any of the following sizes:
640 x 920 pixels for hi-res portrait (without status bar) minimum
640 x 960 pixels for hi-res portrait (full screen) maximum
960 x 600 pixels for hi-res landscape (without status bar) minimum
960 x 640 pixels for hi-res landscape (full screen) maximum
Locked
4-Inch Retina Display Screenshots (Required)
You’re required to upload at least one of these screenshots.
Up to four additional optional screenshots can be uploaded. You can rearrange the screenshots when you create or edit the iTunes Connect record.
Don’t include the device status bar in your screenshots. Screenshot requirements are:
72 dpi, RGB, flattened, no transparency
High-quality JPEG or PNG image file format
Any of the following sizes:
640 x 1096 pixels for portrait (without status bar) minimum
640 x 1136 pixels for portrait (full screen) maximum
1136 x 600 pixels for landscape (without status bar) minimum
1136 x 640 pixels for landscape (full screen) minimum
Locked
4.7-inch Retina screenshot
If your app indicates that it is optimized for the iPhone 6, at least one 4.7-inch screenshot is required. Up to four additional screenshots can be uploaded. You can rearrange the screenshots when you create or edit the iTunes Connect record.
Don’t include the device status bar in your screenshots. Screenshot requirements are:
72 dpi, RGB, flattened, no transparency
High-quality JPEG or PNG image file format
750 x 1334 pixels for hi-res portrait
1334 x 750 pixels for hi-res landscape
Locked
5.5-inch Retina screenshot
If your app indicates that it is optimized for the iPhone 6 Plus, at least one 5.5-inch screenshot is required. Up to four additional screenshots can be uploaded. You can rearrange the screenshots when you create or edit the iTunes Connect record.
Don’t include the device status bar in your screenshots. Screenshot requirements are:
72 dpi, RGB, flattened, no transparency
High-quality JPEG or PNG image file format
1242 x 2208 pixels for hi-res portrait
2208 x 1242 pixels for hi-res landscape
Locked
iPad Screenshots(required if app runs on iPad)
If your binary indicates that your app runs on iPad, you’re required to upload at least one iPad screenshot.
Up to four additional screenshots can be uploaded. You can rearrange the screenshots when you create or edit the iTunes Connect record.
Don’t include the device status bar in your screenshots. Screenshots requirements are:
72 dpi, RGB, flattened, no transparency
High-quality JPEG or PNG image file format
Any of the following sizes:
1024 x 748 pixels for landscape (without status bar) minimum
1024 x 768 pixels for landscape (full screen) maximum
2048 x 1496 pixels for hi-res (without status bar) minimum
2048 x 1536 pixels for hi-res landscape (full screen) maximum
768 x 1004 pixels for portrait (without status bar) minimum
768 x 1024 pixels for portrait (full screen) maximum
1536 x 2008 pixels for hi-res portrait (without status bar) minimum
1536 x 2048 pixels for hi-res portrait (full screen) maximum
