zhangpengdeMacBook-Pro:Jump zhangpeng$ pod install
Analyzing dependencies
[!] There may only be up to 1 unique SWIFT_VERSION per target. Found target(s) with multiple Swift versions:
Jump: Swift
Jump: Swift 3.0
[!] Smart quotes were detected and ignored in your Podfile. To avoid issues in the future, you should not use TextEdit for editing it. If you are not using TextEdit, you should turn off smart quotes in your editor of choice.
方法-> 工程->build setting -> 搜索swift_version ->设置swift_version3.0就好了！