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Device Metrics
iPhone
The device screen may
have lower pixel resolution
than the image rendered
in previous step.
Before the image can be
displayed, it must be
downsampled (resized) to
lower pixel resolution.
Physical Pixels
At the beginning,
coordinates of all
drawings are specified in
Points are abstract units,
they only make sense in
this mathematical
coordinate space.
Points
Point-based drawings are
rendered into pixels. This
process is known as
rasterization.
Point coordinates are
multiplied by scale factor
to get pixel coordinates.
Higher scale factors result
in higher level of detail.
Rendered Pixels
Finally, computed pixels
are displayed on the
physical screen.
The PPI number tells you
how many pixels fit into
one inch and thus how
large the pixels appear in
the real world.
Physical Device
points.
320 × 480
3.5″
render at 1×
(pixels)
2G, 3G, 3GS
3.5″
(points)
320 × 480
show at 163 PPI
320 × 480
640 × 960
3.5″
render at 2×
(pixels)
4, 4s
3.5″
(points)
show at 326 PPI
320 × 568
640×1136
5, 5s, 5c, SE
render at 2×
4″
4″
(points)
(pixels)
show at 326 PPI
375 × 667
750 × 1334
4.7″
render at 2×
(points)
(pixels)
show at 326 PPI
4.7″
375 × 812
1125 × 2436
5.8″
render at 3×
(points)
(pixels)
show at 458 PPI
5.8″
414 × 736
1242 × 2208
1080 × 1920
5.5″
show at 401 PPI
(pixels)
(points)
(device pixels)
5.5″
render at 3×
downsampling / 1.15
414 × 896
828 × 1792
6.1″
render at 2×
(points)
(pixels)
show at 326 PPI
6.1″
414 × 896
1242 × 2688
6.5″
render at 3×
(points)
(pixels)
show at 458 PPI
6.5″
阅读更多
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数字化转型
数字化转型一般指的是企业或组织利用数字技术来改变其业务模式、流程、文化和用户体验,以适应数字化时代的需求。
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iPhone
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