Swift 做的pod私有库的坑

私有库.podspec文件的配置大概如下

s.framework = "UIKit"
s.dependency 'Alamofire', '~> 4.7'
s.dependency 'MBProgressHUD', '~> 1.2.0'

使用私有库的时候报错

[!] The following Swift pods cannot yet be integrated as static libraries:

The Swift pod `xxxx` depends upon `MBProgressHUD`, which does not define modules. 
To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), 
you may set `use_modular_headers!` globally in your Podfile, 
or specify `:modular_headers => true` for particular dependencies.

解决方法有三种

1）可以在Podfile文件的顶部加

use_frameworks!   // 加这行
target 'xxxxxx' do
pod 'MBProgressHUD', '~> 1.2.0'
end

原理是把pod里面的库编译成frameworks

2）也可以在Podfile文件的顶部加

use_modular_headers!   // 加这行
target 'xxxxxx' do
pod 'MBProgressHUD', '~> 1.2.0'
end

原理是把pod里面的库编译成Modular， 它是可以直接在Swift中 import 的，不需要再经过 bridging-header 的桥接

3.因为use_modular_headers!是把所有的pod库都编译成Modular，也可以只改一个库，Podfile文件的如下：

target 'xxxxxx' do
pod 'MBProgressHUD', '~> 1.2.0', :modular_headers => true
end