iOS应用程序之间的几种跳转情况详解

extension ViewController {

 @IBAction func jumpToXinWen(sender: AnyObject) {
  openURL("xinWen://")

 }
 private func openURL (urlString : String) {
  let url = NSURL(string: urlString)!
  if UIApplication.sharedApplication().canOpenURL(url) {
   UIApplication.sharedApplication().openURL(url)
  }

 }
}

 // MARK: - 跳转微信朋友圈
 @IBAction func jumpToWeChatTimeLine(sender: AnyObject) {
  openURL("WeChat://TimeLine?xinWen")

 }
 // MARK: - 跳转微信好友
 @IBAction func jumpToWeChatSession(sender: AnyObject) {
  openURL("WeChat://Session?xinWen")

 }
 private func openURL (urlString : String) {
  let url = NSURL(string: urlString)!
  if UIApplication.sharedApplication().canOpenURL(url) {
   UIApplication.sharedApplication().openURL(url)
  }

extension AppDelegate {
 //监听当前程序被其他程序通过什么样的Url打开
 func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
  //根据url跳转对应页面
  //1.url转化成字符串
  let urlString = url.absoluteString
  //2.获取首页控制器
  let rootVc = application.keyWindow?.rootViewController
  let mainVc = rootVc?.childViewControllers[0] as! ViewController
   //将url传递给mianVc
  mainVc.urlString = urlString
  //3.根据字符串内容完成对应跳转
  if urlString.containsString("Session") {//跳转好友
   mainVc.performSegueWithIdentifier("Session", sender: nil)
  }else if urlString.containsString("TimeLine") {//跳转朋友圈
   mainVc.performSegueWithIdentifier("TimeLine", sender: nil)
  }
  return true
 }
}

 //切换界面,需要来到该方法.能够拿到切换前后的控制器
 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

  if segue.identifier == "Session" {
   let sessionVc = segue.destinationViewController as! SessionViewController
   //传递数据
   sessionVc.urlString = urlString
  }
 }
}

class SessionViewController: UIViewController {

 //接收数据
 var urlString = ""
 override func viewDidLoad() {
  super.viewDidLoad()

  navigationItem.leftBarButtonItem = UIBarButtonItem(title: "退回跳前应用", style: .Plain, target: self, action: #selector(backToStartApp))

 }

}
extension SessionViewController {
 func backToStartApp() {
  //分割Url,获取跳转前的程序的scheme

  let scheme = urlString.componentsSeparatedByString("?")[1]
  print(scheme)
  //拼接字符串
  let backString = "\(scheme)://"
  //打开url
  openURL(backString)
 }


 private func openURL (urlString : String) {
  let url = NSURL(string: urlString)!
  if UIApplication.sharedApplication().canOpenURL(url) {
   UIApplication.sharedApplication().openURL(url)
  }

 }

}