cocoapods提示they required a higher minimum deployment targe
[!]Unabletosatisfythefollowingrequirements:-`RxAlamofire(~>3.0.0)`requiredby`Podfile`Specssatisfyingthe`RxAlamofire(~>3.0.0)`dependencywerefound,buttheyrequiredahigherminimumdeploymenttarget.原因是要添加的类库