iOS 判断应用是否是第一次启动

本文介绍: //MARK: 判断应用是否是第一次启动 static func i sFi rstLaunch() -&g t; Bo ol { let infoDic = Bundl e.main.infoDi c ti on a ry if let dic = infoDi c { //获取当前应用的版本号 let currentAppVers i on = “(dic[“CFBundleSh o rtVers i onSt r in g“] ?? “”)” .

 //MARK: 判断应用是否是第一次启动
    static func isFirstLaunch() -&gt; 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
        }
    }