图标

1. android 图标

drawable 96*96
drawable-ldpi 36*36
drawable-mdpi 48*48
drawable-hdpi 72*72
drawable-xhdpi 96*96
drawable-xxhdpi 144*144

2. ios

icon-small 29*29
icon-small@2x 58*58
icon-40 40*40
icon-40@2x 80*80
icon-50 50*50
icon-50@2x 100*100
icon 57*57
icon@2x 114*114
icon-60 60*60
icon-60@2x 120*120
icon-60@3x 180*180  ** iphone6 新增
icon-72 72*72
icon-72@2x 144*144
icon-76 76*76
icon-76@2x 152*152

app store 1024*1024

启动页

1. android

ldpi：240 x 320 (portrait) 320 x 240 (landscape)
mdpi  320 x 480 (portrait) 480 x 320 (landscape)
hdpi 480 x 800 (portrait) 800 x 480 (landscape)
xhdpi 720 X 1280 (portrait) 1280 x 720 (landscape)
xxhdpi 1080 x 1920 (portrait) 1920 x 1080 (landscape)

2. ios

iPhone 4s (@2x) 640 x 960
iPad and iPad mini (@2x) 1536 x 2048 (portrait) 2048 x 1536 (landscape)
iPad 2 and iPad mini (@1x) 768 x 1024 (portrait) 1024 x 768 (landscape)
iPhone 5 640 x 1136
iPhone 6 750 x 1334 (@2x) for portrait 1334 x 750 (@2x) for landscape
iPhone 6 Plus 1242 x 2208 (@3x) for portrait 2208 x 1242 (@3x) for landscape (物理分辨率是1080p)

参考资料：

https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/IconMatrix.html

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