class func isAppInstalled(_ appName:String) -> Bool{

    let appScheme = "(appName)://app"
    let appUrl = URL(string: appScheme)

    if UIApplication.shared.canOpenURL(appUrl! as URL){
        return true
    } else {
        return false
    }

}

将您正在检查的应用程序的名称添加到info.plist文件中的LSApplicationQueriesSchemes