UIApplication.shared.canOpenURL(URL.init(string: appstoreUrlString)!) ? UIApplication.shared.open(URL.init(string: appstoreUrlString)!) : print("can not open")
} else {
// Fallback on earlier versions
}```
UIApplication.shared.canOpenURL(URL.init(string: appstoreUrlString)!) ? UIApplication.shared.open(URL.init(string: appstoreUrlString)!) : print("can not open")
} else {
// Fallback on earlier versions
}```本文标题：版本判断这么干
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