开发中我们也经常会使用第三方SDK，只要几行代码就实现功能，重点是你看不到代码是怎么实现的，顿时感觉这个逼格很高，大牛一位。（面试中甚至有面试官问：你会不会封装SDK？当时心中忐忑不安，心想什么鬼，面试的是多少K的工作，居然要会SDK）
普及一下静态库和动态库的定义及区别
静态库即静态链接库（Windows 下的 .lib，Linux 和 Mac 下的 .a）。之所以叫做静态，是因为静态库在编译的时候会被直接拷贝一份，复制到目标程序里，这段代码在目标程序里就不会再改变了。静态库的好处很明显，编译完成之后，库文件实际上就没有作用了。目标程序没有外部依赖，直接就可以运行。当然其缺点也很明显，就是会使用目标程序的体积增大。
动态库动态库即动态链接库（Windows 下的 .dll，Linux 下的 .so，Mac 下的 .dylib）。与静态库相反，动态库在编译时并不会被拷贝到目标程序中，目标程序中只会存储指向动态库的引用。等到程序运行时，动态库才会被真正加载进来。动态库的优点是，不需要拷贝到目标程序中，不会影响目标程序的体积，而且同一份库可以被多个程序使用（因为这个原因，动态库也被称作共享库）。同时，编译时才载入的特性，也可以让我们随时对库进行替换，而不需要重新编译代码。动态库带来的问题主要是，动态载入会带来一部分性能损失，使用动态库也会使得程序依赖于外部环境。如果环境缺少动态库或者库的版本不正确，就会导致程序无法运行（Linux 下喜闻乐见的 lib not found 错误）。
创建动态库framework的步骤》》》》》》见图
1、新建项目
Snip20161019_1.png
2、将代码导入到项目中，并将公开的接口暴露
Snip20161019_2.png
注意：开放接口的头文件，一定要导入这个新建文件的头文件中，否则其他项目导入framework时会出现：找不到子模块的警告⚠️
Snip20161019_12.png
3、设置适合所有框架
Snip20161019_3.png
4、因为动态库打包出来只能是在真机或模拟器使用，为了方便调试，可以添加一个脚本命令，生成一个同时支持真机和模拟机的framework
Snip20161019_6.png
Snip20161019_7.png
脚本命令
set
-e
set
+u
### Avoid recursively calling this script.
if
[[ $UF_MASTER_SCRIPT_RUNNING ]]
then
exit 0
fi
set
-u
export UF_MASTER_SCRIPT_RUNNING=1
### Constants.
UF_TARGET_NAME=${PROJECT_NAME}
FRAMEWORK_VERSION=
"A"
UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal
IPHONE_DEVICE_BUILD_DIR=${BUILD_DIR}/${CONFIGURATION}-iphoneos
IPHONE_SIMULATOR_BUILD_DIR=${BUILD_DIR}/${CONFIGURATION}-iphonesimulator
### Functions
## List files in the specified directory, storing to the specified array.
#
# @param $1 The path to list
# @param $2 The name of the array to fill
#
##
list_files ()
{
filelist=$(ls
"$1"
)
while
read line
do
eval
"$2[\${#$2[*]}]=\"\$line\""
done <<<
"$filelist"
}
### Take build target.
if
[[
"$SDK_NAME"
=~ ([A-Za-z]+) ]]
then
SF_SDK_PLATFORM=${BASH_REMATCH[1]} #
"iphoneos"
or
"iphonesimulator"
.
else
echo
"Could not find platform name from SDK_NAME: $SDK_NAME"
exit 1
fi
### Build simulator platform. (i386, x86_64)
echo
"========== Build Simulator Platform =========="
echo
"===== Build Simulator Platform: i386 ====="
xcodebuild -project
"${PROJECT_FILE_PATH}"
-target
"${TARGET_NAME}"
-configuration
"${CONFIGURATION}"
-sdk iphonesimulator BUILD_DIR=
"${BUILD_DIR}"
OBJROOT=
"${OBJROOT}"
BUILD_ROOT=
"${BUILD_ROOT}"
CONFIGURATION_BUILD_DIR=
"${IPHONE_SIMULATOR_BUILD_DIR}/i386"
SYMROOT=
"${SYMROOT}"
ARCHS=
'i386'
VALID_ARCHS=
'i386'
$ACTION
echo
"===== Build Simulator Platform: x86_64 ====="
xcodebuild -project
"${PROJECT_FILE_PATH}"
-target
"${TARGET_NAME}"
-configuration
"${CONFIGURATION}"
-sdk iphonesimulator BUILD_DIR=
"${BUILD_DIR}"
OBJROOT=
"${OBJROOT}"
BUILD_ROOT=
"${BUILD_ROOT}"
CONFIGURATION_BUILD_DIR=
"${IPHONE_SIMULATOR_BUILD_DIR}/x86_64"
SYMROOT=
"${SYMROOT}"
ARCHS=
'x86_64'
VALID_ARCHS=
'x86_64'
$ACTION
### Build device platform. (armv7, arm64)
echo
"========== Build Device Platform =========="
echo
"===== Build Device Platform: armv7 ====="
xcodebuild -project
"${PROJECT_FILE_PATH}"
-target
"${TARGET_NAME}"
-configuration
"${CONFIGURATION}"
-sdk iphoneos BUILD_DIR=
"${BUILD_DIR}"
OBJROOT=
"${OBJROOT}"
BUILD_ROOT=
"${BUILD_ROOT}"
CONFIGURATION_BUILD_DIR=
"${IPHONE_DEVICE_BUILD_DIR}/armv7"
SYMROOT=
"${SYMROOT}"
ARCHS=
'armv7 armv7s'
VALID_ARCHS=
'armv7 armv7s'
$ACTION
echo
"===== Build Device Platform: arm64 ====="
xcodebuild -project
"${PROJECT_FILE_PATH}"
-target
"${TARGET_NAME}"
-configuration
"${CONFIGURATION}"
-sdk iphoneos BUILD_DIR=
"${BUILD_DIR}"
OBJROOT=
"${OBJROOT}"
BUILD_ROOT=
"${BUILD_ROOT}"
CONFIGURATION_BUILD_DIR=
"${IPHONE_DEVICE_BUILD_DIR}/arm64"
SYMROOT=
"${SYMROOT}"
ARCHS=
'arm64'
VALID_ARCHS=
'arm64'
$ACTION
### Build device platform. (arm64, armv7)
echo
"========== Build Universal Platform =========="
## Copy the framework structure to the universal folder (clean it first).
rm -rf
"${UNIVERSAL_OUTPUTFOLDER}"
mkdir -p
"${UNIVERSAL_OUTPUTFOLDER}"
## Copy the last product files of xcodebuild command.
cp -R
"${IPHONE_DEVICE_BUILD_DIR}/arm64/${PROJECT_NAME}.framework"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework"
### Smash them together to combine all architectures.
lipo -create
"${BUILD_DIR}/${CONFIGURATION}-iphonesimulator/i386/${PROJECT_NAME}.framework/${PROJECT_NAME}"
"${BUILD_DIR}/${CONFIGURATION}-iphonesimulator/x86_64/${PROJECT_NAME}.framework/${PROJECT_NAME}"
"${BUILD_DIR}/${CONFIGURATION}-iphoneos/armv7/${PROJECT_NAME}.framework/${PROJECT_NAME}"
"${BUILD_DIR}/${CONFIGURATION}-iphoneos/arm64/${PROJECT_NAME}.framework/${PROJECT_NAME}"
-output
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/${PROJECT_NAME}"
### Create standard structure for framework.
#
# If we don't have "Info.plist -> Versions/Current/Resources/Info.plist", we may get error when use this framework.
#
# MyFramework.framework
# |-- MyFramework -> Versions/Current/MyFramework
# |-- Headers -> Versions/Current/Headers
# |-- Resources -> Versions/Current/Resources
# |-- Info.plist -> Versions/Current/Resources/Info.plist
# `-- Versions
# |-- A
# | |-- MyFramework
# | |-- Headers
# | | `-- MyFramework.h
# | `-- Resources
# | |-- Info.plist
# | |-- MyViewController.nib
# | `-- en.lproj
# | `-- InfoPlist.strings
# `-- Current -> A
#
echo
"========== Create Standard Structure =========="
mkdir -p
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Versions/${FRAMEWORK_VERSION}/"
mv
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/${PROJECT_NAME}"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Versions/${FRAMEWORK_VERSION}/"
mv
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Headers"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Versions/${FRAMEWORK_VERSION}/"
mkdir -p
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Resources"
declare -a UF_FILE_LIST
list_files
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/"
UF_FILE_LIST
for
file_name
in
"${UF_FILE_LIST[@]}"
do
if
[[
"${file_name}"
==
"Info.plist"
]] || [[
"${file_name}"
=~ .*\.lproj$ ]]
then
mv
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/${file_name}"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Resources/"
fi
done
mv
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Resources"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Versions/${FRAMEWORK_VERSION}/"
ln -sfh
"Versions/Current/Resources/Info.plist"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Info.plist"
ln -sfh
"${FRAMEWORK_VERSION}"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Versions/Current"
ln -sfh
"Versions/Current/${PROJECT_NAME}"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/${PROJECT_NAME}"
ln -sfh
"Versions/Current/Headers"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Headers"
ln -sfh
"Versions/Current/Resources"
"${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Resources"
### Open the universal folder.
open
"${UNIVERSAL_OUTPUTFOLDER}"
5、生成framework文件，选中“StyleBox”文件，运行程序
Snip20161019_9.png
Snip20161019_11.png
到这里，framework的创建已经成功了，只要右击“show in Finder”，就可以找得framework并导入其他项目中
Paste_Image.png
项目实际使用中，直接导入framework，并且需要动态库需要在此添加：
Snip20161019_14.png
当动态库中，包含资源文件如nib文件或图片的....
Snip20161019_13.png
以上是创建framework的基本流程
