Flutter plugin - ios

好多年前做过私有pod库的demo，之后再没接触，已然忘光。最近在做flutter plugin 的ios端开发，弄了一天多，记录一下：

1、podspec基本配置：

Flutter plugin 开发的核心在于pod的依赖文件:demo.podspec
下面是我这个plugin用到的podspec文件:

#
# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
# Run `pod lib lint card_ocr.podspec' to validate before publishing.
#
Pod::Spec.new do |s|
  s.name             = 'card_ocr'
  s.version          = '0.0.1'
  s.summary          = 'A Flutter plugin for iOS  for scanning credit cards using the camera.'
  s.description      = <<-DESC
A Flutter plugin for iOS and Android for scanning credit cards using the camera.
                       DESC
  s.homepage         = 'http://example.com'
  s.license          = { :file => '../LICENSE' }
  s.author           = { 'Your Company' => 'email@example.com' }
  s.info_plist = {
    'CFBundleIdentifier' => 'com.zb.example'
  }
  s.source           = { :path => '.' }
  s.platform = :ios, '9.0'
  
  s.source_files = 'CardIO/**/*','Classes/**/*'
  s.public_header_files = 'Classes/*.h'
  
#  s.resources = 'Assets/localization/*'
  s.resource_bundle = { 'bundle' => 'Assets/localization/*' }
  
  s.dependency 'Flutter'
  s.dependency 'Localize-Swift'
  
  s.vendored_libraries  = 'CardIO/*.{a}'
  s.frameworks = 'Accelerate','AVFoundation','AudioToolbox','CoreMedia','MobileCoreServices'
  
#  s.pod_target_xcconfig = { 'OTHER_LDFLAGS' => '-ObjC' }
  s.pod_target_xcconfig = { 'OTHER_LDFLAGS' => '-lc++'}
  
end

具体参数：

1.该参数是项目中所有用到的文件，*通配符，**目录递归通配，引用好像有顺序要求，CardIO和Classes反过来写，Classes中的会报错找不到CardIO中的类，下面的写法 就不报错

s.source_files = 'CardIO/**/*','Classes/**/*'

2.要暴露出去的头文件

s.public_header_files = 'Classes/*.h'

3.s.resources是把目录下的资源文件打包到主工程的bundle目录下，s.resource_bundle打包资源文件到自己的bundle中

  #  s.resources = 'Assets/localization/*'
  s.resource_bundle = { 'bundle' => 'Assets/localization/*' }

4.项目中用到的三方静态库,加上这个之后就不用在build setting的library search patch中配置路径

s.vendored_libraries  = 'CardIO/*.{a}'

5.项目所依赖的系统的framework，提前配置，不用单独在导入

s.frameworks = 'Accelerate','AVFoundation','AudioToolbox','CoreMedia','MobileCoreServices'

6.提前配置 other link flag 单个配置和多个配置：

#  s.pod_target_xcconfig = { 'OTHER_LDFLAGS' => '-ObjC' }
  s.pod_target_xcconfig = { 'OTHER_LDFLAGS' => '-lc++'}

#s.pod_target_xcconfig = { 'OTHER_LDFLAGS' => ['-ObjC','-lc++']}

2、framework中的bundle资源

1、不单独创建资源bundle

  s.resources = 'Assets/localization/*'

  ........
  //没有单独给资源文件创建bundle的，直接通过获取当点bundle(xxxxx)
  NSBundle *bundle = [NSBundle bundleForClass:[self class]];
  NSString *iconPath = [bundle pathForResource:@"ic_close_dark" ofType:@"png"];
  UIImage *icon1 = [UIImage imageWithContentsOfFile:iconPath];

2、单独创建资源bundle

  s.resource_bundle = { 'flutterimageshow' => 'Assets/localization/*' }
  .......
  
  //先找到当前的类所在的framework，然后通过bundleName找到对应的资源bundle的URL，在找到对应的资源bundle
  NSBundle *bundle = [NSBundle bundleForClass:[self class]];
  NSURL *url = [bundle URLForResource:@"flutterimageshow" withExtension:@"bundle"];
  NSBundle *sourceBundle = [NSBundle bundleWithURL:url];
  NSString *icon1Path = [sourceBundle pathForResource:@"ic_close_dark" ofType:@"png"];
  UIImage *icon1 = [UIImage imageWithContentsOfFile:icon1Path];

以上是两种读取本地资源的方式。