2012-03-07 | © 2012 Apple Inc. All Rights Reserved.
9
Platform Characteristics
"#$%&'#$(), &#+&()++,- +) iOS, 01-2$ %34 5+06)78+,9 &#&:-++&#$-', (7032;09 +)
(<)01&4-'#$(0- =&78<&()$-73 0 =%07&>-+03, # 6&$&%,1 &+ %):&$)-$. ?)0:&7-- 5#=-@+,-
=%07&>-+03 &9()$,()2$ A$0 &#&:-++&#$0 0 &:-#=-B0()2$ (<)01&4-'#$(0- =&78<&()$-73 0
0+$-C%0%&()+, =%07&>-+0' ( 5#$%&'#$(-, # 6&$&%,1 &+0 %):&$)2$.
The Display Is Paramount, Regardless of Its Size
(J0#=7-' K1--$ LC%&1+&- M+)B-+0-, ?-<)(0#01& &$ N(&-C&
O)<1-%))
J0#=7-' iOS-5#$%&'#$(, 7->0$ ( &#+&(- =&78<&()$-78#6&C& &=,$). Q%&1- $&C&, B$& 7240 (043$
6%)#0(,' $-6#$, C%)R065 0 1-40) +) 40#=7--, &+0 (<)01&4-'#$(52$ R0<0B-#60, # =&1&;82
Multi-Touch 0+$-%R-'#), %56&(&4#$(53#8 #(&01 <+)+0-1 (4)>- 6&C4) +- 1&C5$ (04-$8 A6%)+).
?-#1&$%3 +) $&, B$& %)<1-%, 40#=7--( %)<+,9 40)C&+)7-' 0 %)<%-@-+0' 1&C5$ &6)<,()$8
%)<70B+&- (703+0- +) (<)01&4-'#$(0- =&78<&()$-73 # =%07&>-+0-1, +-6&$&%,- 4-'#$(03
=%01-+32$#3 6& (#-1 iOS-5#$%&'#$()1:
- 1)6#01)78+& 6&1R&%$+,' %)<1-% 473 +)>)$03 UI A7-1-+$&( - 44944 =06#-73;
- &$&:%)>-+0- 954&>-#$(-++&' %):&$, ( =%07&>-+00 &B-+8 B-$6&-;
- X&78<&()$-70 R&65#0%52$#3 +) 6&+$-+$-.
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: Pixel
- =&49&43;)3 -40+0Y) 0<1-%-+03 %)<1-%) A6%)+) 5#$%&'#$() 070
%)<1-%) <+)B6), 6&$&%,' (, #&<4)-$- ( C%)R0B-#6&1 %-4)6$&%-.
Point
- #&&$(-$#$(52;)3
-40+0Y) 0<1-%-+03 0#=&78<5-1)3 473 0<1-%-+03 &:7)#$0, &$&:%)>)-1&' +) A6%)+-.
?) #$)+4)%$+&1 %)<%-@-+00 A6%)+) 5#$%&'#$(), &40+ Point %)(-+ &4+&15 Pixel, +& ( 4%5C09
%)<%-@-+039, (&<1&>+, 4%5C0- co&$+&@-+03: +) Retina-40#=7--, +)=%01-%, &40+ Point
#&&$(-$#$(5-$ 4(51 Pixel.
N1. "Points Versus Pixels" ( iOS Application Programming Guide 473 =&4%&:+&C& 0<5B-+03 A$&'
6&+Y-=Y00.
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Device Orientation Can Change
(^&<1&>+&#$8 N1-+, L%0-+$)Y00 "#$%&'#$())
X&78<&()$-70 1&C5$ (%);)$8 iOS-5#$%&'#$(& ( 72:&' 1&1-+$ 0 =& %)<+,1 =%0B0+)1.
?)=%01-%, 0+&C4) +-6&$&%,1 =&78<&()$-731 54&:+-- %):&$)$8 ( (-%$06)78+&' &%0-+$)Y00, )
0+&C4) - ( C&%0<&+$)78+&'. Q)6&(, :, +0 :,70 =%0B0+, 473 (%);-+03 5#$%&'#$(),
=&78<&()$-70 &>04)2$ &$ =%07&>-+03 &#+&(+,9 R5+6Y0&+)78+,9 (&<1&>+&#$-'.
X&78<&()$-70 6)6 =%)(07& <)=5#6)2$ =%07&>-+03 # C7)(+&C& A6%)+) 0 &>04)2$, B$& &+0
<)=5#$3$#3 ( $&' >- &%0-+$)Y00. ^ iPhone 0 iPad %)<+0Y) ( &$&:%)>-+00 Home Screen, =&-
%)<+&15 (703-$ +) =%07&>-+03:
- ?) iPhone 0 iPod Home screen &$&:%)>)-$#3 $&786& ( &4+&' &%0-+$)Y00 - (-%$06)78+&' -
