在Podfile文件中引入ReactiveCocoa時(shí)報(bào)錯(cuò)。

target 'ReactiveCocoa' do
pod 'ReactiveCocoa'
end

執(zhí)行pod install時(shí)報(bào)錯(cuò)信息如下。

?  ReactiveCocoa git:(master) ? vim Podfile 
?  ReactiveCocoa git:(master) ? pod install
Analyzing dependencies
Downloading dependencies
Installing ReactiveCocoa (5.0.2)
Installing ReactiveSwift (1.1.1)
Installing Result (3.2.1)
[!] Pods written in Swift can only be integrated as frameworks; 
add `use_frameworks!` to your Podfile or target to opt into using it.
The Swift Pods being used are: ReactiveCocoa, ReactiveSwift, and Result

根據(jù)報(bào)錯(cuò)提示信息,在Podfile文件中加上use_frameworks!字段。就能pod install成功。

target 'ReactiveCocoa' do
pod 'ReactiveCocoa'
use_frameworks!
end

Cmd + R運(yùn)行連續(xù)選擇兩次later 仍然報(bào)錯(cuò)，信息如下。

“Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be 
configured correctly for targets which use Swift.Use the 
[Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version 
or use the Build Settings editor to configure the build setting directly.

在網(wǎng)上找了很多種答案,選擇Pods - ReactiveCocoa - Swift Compiler -Version - Use Legacy Swift Language Version，把Unspecified改成YES。發(fā)現(xiàn)還是報(bào)錯(cuò)。最后將ReactiveCocoa、ReactiveSwift和Result的Use Legacy Swift Language Version都改為NO才能解決。