偶尔需要查下设备的分辨率和缩放因子，经常用的时候才网上搜下确认下，比较麻烦。现在整理下方便自己和别人以后使用。
- 1 inch = 2.54cm = 25.4mm
- @2x即1个Point被渲染成1个2x2的像素矩阵，即某个方向上1pt存在2px
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PPI（Pixel Per Inch by diagonal）：沿着对角线每英寸所拥有的像素数目。如iPhone 6的PPI=gif.latex.gif
iPhone 设备
- 放大模式下，iPhone 6分辨率为640x1136(Upsampling，插值采样)，iPhone 6 Plus/6S Plus分辨率为1125×2001(Downsampling，缩减像素采样)。
- iPhone 6 Plus/6S Plus的实际分辨率是1920x1080，实际缩放为@2.46x。（也就是说实际上应该用@2.46x的素材。iOS 拿到@3x绘制结果，实时地再缩小到实际的1080 x 1920分辨率，Downsampling）详见知乎上的讨论。
| 设备 | 尺寸(inch) | 逻辑分辨率(pt) | 实际分辨率(px) | Scale Factor |
|---|---|---|---|---|
| iPhone 16e | 6.1 | 390x844 | 1170x2532 | @3x |
| iPhone 16 Pro Max | 6.9 | 440x956 | 1320x2868 | @3x |
| iPhone 16 Pro | 6.3 | 402x874 | 1206x2622 | @3x |
| iPhone 16 Plus | 6.7 | 430x932 | 1290x2796 | @3x |
| iPhone 16 | 6.1 | 393x852 | 1179x2556 | @3x |
| iPhone 15 Pro Max | 6.7 | 430x932 | 1290x2796 | @3x |
| iPhone 15 Pro | 6.1 | 393x852 | 1179x2556 | @3x |
| iPhone 15 Plus | 6.7 | 430x932 | 1290x2796 | @3x |
| iPhone 15 | 6.1 | 393x852 | 1179x2556 | @3x |
| iPhone 14 Pro Max | 6.7 | 430x932 | 1290x2796 | @3x |
| iPhone 14 Pro | 6.1 | 393x852 | 1179x2556 | @3x |
| iPhone 14 Plus | 6.7 | 428x926 | 1284x2778 | @3x |
| iPhone 14 | 6.1 | 390x844 | 1170x2532 | @3x |
| iPhone 13 Pro Max | 6.7 | 428x926 | 1284x2778 | @3x |
| iPhone 13 Pro | 6.1 | 390x844 | 1170x2532 | @3x |
| iPhone 13 | 6.1 | 390x844 | 1170x2532 | @3x |
| iPhone 13 mini | 5.4 | 360x780 | 1080x2340 | @3x |
| iPhone 12 Pro Max | 6.7 | 428x926 | 1284x2778 | @3x |
| iPhone 12 Pro | 6.1 | 390x844 | 1170x2532 | @3x |
| iPhone 12 | 6.1 | 390x844 | 1170x2532 | @3x |
| iPhone 12 mini | 5.4 | 360x780 | 1080x2340 | @3x |
| iPhone 11 Pro Max | 6.5 | 414x896 | 1242x2688 | @3x |
| iPhone 11 Pro | 5.8 | 375x812 | 1125x2436 | @3x |
| iPhone 11 | 6.1 | 414x896 | 828x1792 | @2x |
| iPhone Xr | 6.1 | 414x896 | 828x1792 | @2x |
| iPhone Xs Max | 6.5 | 414x896 | 1242x2688 | @3x |
| iPhone Xs | 5.8 | 375x812 | 1125x2436 | @3x |
| iPhone X | 5.8 | 375x812 | 1125x2436 | @3x |
| iPhone 8 Plus | 5.5 | 414x736 | 1242x2208 | @3x |
| iPhone 8 | 4.7 | 375x667 | 750x1334 | @2x |
| iPhone 7 Plus | 5.5 | 414x736 | 1242x2208 | @3x |
| iPhone 7 | 4.7 | 375x667 | 750x1334 | @2x |
| iPhone 6S Plus | 5.5 | 414x736 | 1242x2208 | @3x |
| iPhone 6 Plus | 5.5 | 414x736 | 1242x2208 | @3x |
| iPhone 6S | 4.7 | 375x667 | 750x1334 | @2x |
| iPhone 6 | 4.7 | 375x667 | 750x1334 | @2x |
| iPhone 5C | 4 | 320x568 | 640x1136 | @2x |
| iPhone 5S | 4 | 320x568 | 640x1136 | @2x |
| iPhone 5 | 4 | 320x568 | 640x1136 | @2x |
| iPhone 4S | 3.5 | 320x480 | 640x960 | @2x |
| iPhone 4 | 3.5 | 320x480 | 640x960 | @2x |
| iPhone 3GS | 3.5 | 320x480 | 320x480 | @1x |
| iPhone 3G | 3.5 | 320x480 | 320x480 | @1x |
| iPhone | 3.5 | 320x480 | 320x480 | @1x |
| iPhone SE (3rd generation) | 4.7 | 375x667 | 750x1334 | @2x |
| iPhone SE (2nd generation) | 4.7 | 375x667 | 750x1334 | @2x |
| iPhone SE | 4 | 320x568 | 640x1136 | @2x |
