pod spec文件支持mrc(-fno-objc-arc)和文

s.subspec 'ZBarSDK1' do |bar1|
bar1.source_files = 'YXTToolKitsSDK/ZBarSDK/*.{h,m}'
bar1.requires_arc = false
bar1.compiler_flags = '-Wno-format -Wno-shorten-64-to-32'
end