iOS 判断应用是否是第一次启动

 //MARK: 判断应用是否是第一次启动
    static func isFirstLaunch() -> Bool {
    
    
        let infoDic = Bundle.main.infoDictionary
        if let dic = infoDic {
    
    
            //获取当前应用的版本号
            let currentAppVersion = "\(dic["CFBundleShortVersionString"] ?? "")"
            //获取上次启动应用保存的appVersion
            let version = "\(UserDefaults.standard.object(forKey: "kAppVersion") ?? "")"
            //版本升级或者首次登陆
            if version != currentAppVersion {
    
    
                UserDefaults.standard.setValue(currentAppVersion, forKey: "kAppVersion")
                return true
            } else {
    
    
                return false
            }
        } else {
    
    
            return false
        }
    }

end