iOS App切片或细化功能不起作用

Question

我目前正在尝试优化iOS IPA的大小，并希望新的“ iOS App Slicing”会减少最终输出中包含的图像数量。似乎并非如此。

我在iOS 9.3上部署目标（7.0-虽然也尝试9.3无济于事）。这是一个通用应用程序，应用程序图标/启动图像位于资产目录中（以及其他一些图像资源）。

为了测试切片，我按照此处的说明进行操作：https : //developer.apple.com/library/tvos/documentation/IDEs/Conceptual/AppDistributionGuide/TestingYouriOSApp/TestingYouriOSApp.html#//apple_ref/doc/uid/TP40012582-CH8- SW17

App Thinning Size报告显示设备类型之间的大小差异很小，iPad和iPhone之间应该有相当大的差异！

App Thinning Size Report for All Variants of myApp

Variant: myApp-iPad (4th generation)-etc.ipa
Supported devices: iPad (3rd generation) and iPad (4th generation)
App + On Demand Resources size: 71.8 MB compressed, 90.3 MB uncompressed
App size: 71.8 MB compressed, 90.3 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPad 2-etc.ipa
Supported devices: iPad 2 and iPad mini
App + On Demand Resources size: 71.6 MB compressed, 90.1 MB uncompressed
App size: 71.6 MB compressed, 90.1 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPad Pro (12.9-inch).ipa
Supported devices: iPad Pro (12.9-inch)
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPad Pro (9.7-inch).ipa
Supported devices: iPad Pro (9.7-inch)
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPad mini 3-etc.ipa
Supported devices: iPad Air, iPad mini 2, and iPad mini 3
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPad mini 4-etc.ipa
Supported devices: iPad Air 2 and iPad mini 4
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 4S.ipa
Supported devices: iPhone 4S
App + On Demand Resources size: 71.8 MB compressed, 90.3 MB uncompressed
App size: 71.8 MB compressed, 90.3 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 5-etc.ipa
Supported devices: iPhone 5 and iPhone 5c
App + On Demand Resources size: 71.8 MB compressed, 90.3 MB uncompressed
App size: 71.8 MB compressed, 90.3 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 5s.ipa
Supported devices: iPhone 5s
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 6 Plus.ipa
Supported devices: iPhone 6 Plus
App + On Demand Resources size: 71.9 MB compressed, 91.2 MB uncompressed
App size: 71.9 MB compressed, 91.2 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 6.ipa
Supported devices: iPhone 6
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 6s Plus.ipa
Supported devices: iPhone 6s Plus
App + On Demand Resources size: 71.9 MB compressed, 91.2 MB uncompressed
App size: 71.9 MB compressed, 91.2 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone 6s.ipa
Supported devices: iPhone 6s
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPhone SE.ipa
Supported devices: iPhone SE
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPod touch (6th generation).ipa
Supported devices: iPod touch (6th generation)
App + On Demand Resources size: 71.5 MB compressed, 90.9 MB uncompressed
App size: 71.5 MB compressed, 90.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp-iPod touch.ipa
Supported devices: iPod touch
App + On Demand Resources size: 71.8 MB compressed, 90.3 MB uncompressed
App size: 71.8 MB compressed, 90.3 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed


Variant: myApp.ipa
Supported devices: Universal
App + On Demand Resources size: 75.3 MB compressed, 99.9 MB uncompressed
App size: 75.3 MB compressed, 99.9 MB uncompressed
On Demand Resources size: Zero KB compressed, Zero KB uncompressed

在进一步研究该过程导出的“特定设备变体”之后，我发现没有明显的切片发生。

iPhone 5设备版本的应用有效负载-解压IPA后：

如果我对切片的理解是正确的，则不应有其他iOS设备（例如iPhone 6 +，iPad）的图标或启动图像

如果有帮助，这是我的资产目录的内容（在xcode和finder中）：

提前致谢！:)

Answer 1

回答我自己的问题：

我当前的假设是启动图像和图标没有被细化/切片。这是因为它们通常用于在启动时检测对某些设备的支持。

不过，我可以确认资产目录中的其他图像资源已正确细化。

您可以通过解压缩 IPA 并在 IPA 内的 Assets.car 文件上运行 CARExtractor 工具来进行检查。

https://github.com/Marxon13/iOS-Asset-Extractor/tree/master/CARExtractor