我试图将MuPDF纳入podspec。虽然这不是我想要的那么好......
error: could not build module 'UIKit'
这是我每次尝试pod lib lint时得到的错误。我得到两种口味，取决于podspec的确切内容。但在那之前，有些背景！
tl; dr ：我的大脑无法处理MuPDF及其静态库依赖关系，从中制作出漂亮的podspec。你能帮忙吗？
所以图书馆是MuPDF（http://mupdf.com）;我克隆了他们的git存储库。它附带了一堆.m文件，但主库是用C语言编写的，并且有几个依赖项。所以我们最终得到了一些静态库（.a文件）。文件布局如下所示：
mupdf/
# objc files
platform/ios/common.{h,m}
platform/ios/Classes/*.{h,m}
# headers and static libraries
include/**/*.h
platform/ios/thirdparty/*.a
include文件夹包含platform/ios/thirdparty中库所需的标头。这些标头包含在platform/ios/common.h。
我的podspec看起来像这样：
Pod::Spec.new do |s|
# <enter usual podspec yada yada here>
s.source_files = "platform/ios/Classes/**/*.{h,m}", "platform/ios/common.{h,m}", "include/**/*.h"
s.public_header_files = "platform/ios/Classes/**/*.h"
s.header_mappings_dir = "include"
s.libraries = "z"
s.vendored_libraries = "platform/ios/thirdparty/*"
end
基于此（以及podspec的变体），我得到两个不同的错误。
使用这个确切的podspec配置，我收到以下错误：
- ERROR | /<path>/mupdf/include/mupdf/fitz/math.h:97:8:
error: redefinition of 'fz_point_s'
- NOTE | /<path>/mupdf/include/mupdf/fitz/math.h:97:8:
note: previous definition is here
- ERROR | /<path>/mupdf/include/mupdf/fitz/math.h:121:8:
error: redefinition of 'fz_rect_s'
- NOTE | /<path>/mupdf/include/mupdf/fitz/math.h:121:8:
note: previous definition is here
# etc. etc.
- NOTE | Target Support Files/Pods-mupdf/Pods-mupdf-prefix.pch:2:9:
fatal error: could not build module 'UIKit'
如果我注释掉s.public_header_files行，我最终会出现循环依赖错误。太奇怪了！
- NOTE | /privateTarget Support Files/Pods-mupdf/Pods-mupdf-umbrella.h:1:9:
fatal error: cyclic dependency in module 'UIKit':
UIKit -> Foundation -> CoreFoundation -> MuPDF -> UIKit
我的大脑疼，请帮忙！
答案 0 :(得分：4)
我不太确定你的PodSpec会发生什么事，抱歉。这可能与你如何解决math.h头文件冲突有关 - 在pod规范中做到这一点是非常棘手的。
我刚刚创建了一个CocoaPod for MuPDF，并创建了一个example application based on that pod，一切似乎都正常。
此处参考我的pod规范（请注意，这已经过时了;请参阅published mupdf pod spec以获取与最新版本的mupdf和最新CocoaPods兼容的版本）：
# podspec for MuPDF
#
# Copyright (C) 2015 Joseph Heenan <joseph@heenan.me.uk>
Pod::Spec.new do |s|
s.name = "MuPDF"
s.version = "1.7"
s.summary = "A lightweight PDF and XPS viewer."
s.description = <<-DESC
MuPDF is a small, fast, and yet complete PDF viewer.
It supports PDF 1.7 with transparency, encryption,
hyperlinks, annotations, searching and more. It also
reads XPS and OpenXPS documents.
DESC
s.homepage = "http://www.mupdf.com/"
s.license = { :type => "Affero GNU GPL v3", :file => 'COPYING' }
s.author = "Artifex Software Inc"
s.source = { :git => "https://github.com/ArtifexSoftware/mupdf.git", :tag => s.version.to_s }
s.platform = :ios, '6.1'
s.requires_arc = false
s.source_files = 'platform/ios/Classes/**/*.[mh]', 'platform/ios/common.[mh]'
s.resources = 'platform/ios/*.png', 'platform/android/res/drawable-ldpi/*.png'
s.public_header_files = "platform/ios/Classes/**/*.h", "platform/ios/common.h"
# See https://github.com/CocoaPods/CocoaPods/issues/1437
s.preserve_paths = "include/*", "include/**/*"
s.prepare_command = <<-CMD
# I tried --depth 1 here but it failed with git error "fatal: reference is not a tree:"
git submodule update --init
cd platform/ios
# build the various .a files
# release armv7 + arm64
xcodebuild -scheme MuPDF -configuration Release CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO
# release i386 + x86_64
xcodebuild -scheme MuPDF -configuration Release -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO
# combine into fat libraries
cd ../../build/
for i in curl freetype jbig2dec jpeg mujs mupdf openjpeg z; do
LIB=lib${i}.a
lipo -create -output $LIB release-ios-i386-x86_64/$LIB release-ios-armv7-arm64/$LIB
done
CMD
s.vendored_libraries = "build/*.a"
s.xcconfig = {
# we have a math.h which conflicts with the system math.h unless
# we disable header maps
'USE_HEADERMAP' => 'NO',
'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/Target Support Files/Pods"',
'USER_HEADER_SEARCH_PATHS' => '"${PODS_ROOT}/MuPDF/include"',
'ALWAYS_SEARCH_USER_PATHS' => 'NO'
}
end
答案 1 :(得分：0)
我通过在Build Phases中删除和添加UIKit.framework解决了这个问题 - ＆gt; Link Binary With Libraries和set project的最低iOS版本是6.0。