iOS app跳转app且传值或者传图片

iOS如何在两个app之间跳转，并且传值或者传图

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先看看效果
app切换的时候，实现传值和传图片（某些app的大图分享功能，就可以这样实现，当然还有其他方法）

app -> app
在浏览器中打开app
browser -> app

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1. 需要在info.plist中添加URL types
   如下图，URL Schemes下的item 0中填入代表当前app的标识

2. iOS 9中app需要在info.plist中将要使用到的URL Schemes添加到白名单，才可正常跳转或者检查是否安装（比如，想要在当前app中跳转到微信中，那么就需要将微信的URL Schemes添加到白名单）
   在info.plist中添加LSApplicationQueriesSchemes，如下

3. 打开对应app需要使用对应的URL Schemes（FFWinter://，后面可以拼接一些需要传递的信息）
   UIApplication.shared.open(URL.init(string: "FFWinter://****")!, options: [:], completionHandler: nil)
4. 如果跳转的时候，需要携带图片的话需要借助剪贴板UIPasteboard
5. 跳转到的app中：
   OC在入口类中的- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey, id> *)options中处理
   Swift在入口类中的func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool中处理
6. 看👇栗子

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栗子：

1. 首先创建两个项目FFWinter与FFSpring，并且各自添加对应的URL Schemes和LSApplicationQueriesSchemes
2. FFWinter中
   AppDelegate中

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    let url = url.absoluteString;
    let alertController = UIAlertController.init(title: "", message: url, preferredStyle: .alert)
    alertController.addAction(UIAlertAction.init(title: "确认", style: .cancel, handler:nil))
    app.keyWindow?.rootViewController!.present(alertController, animated: true, completion: nil)
    return false
}

vc中

@IBAction func openSpringAppClcik(_ sender: Any) {
    UIPasteboard.remove(withName: UIPasteboardName.general)
    UIPasteboard.general.setData(Data.init(), forPasteboardType: "FFWinter")

    let url = URL.init(string: "FFSpring://showSomething")!
    if UIApplication.shared.canOpenURL(url) {
        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    } else {
        let alertController = UIAlertController.init(title: "无法打开FFSpring", message: "", preferredStyle: .alert)
        alertController.addAction(UIAlertAction.init(title: "确认", style: .cancel, handler: nil))
        self.present(alertController, animated: true, completion: nil)
    }
}

@IBAction func openSpringAppWithImageClick(_ sender: Any) {
    let pasteboard = UIPasteboard.general
    pasteboard.setData(UIImageJPEGRepresentation(UIImage.init(named: "ali.jpeg")!, 0)!, forPasteboardType: "FFWinter")

    let url = URL.init(string: "FFSpring://showSomething")!
    if UIApplication.shared.canOpenURL(url) {
        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    } else {
        let alertController = UIAlertController.init(title: "无法打开FFSpring", message: "", preferredStyle: .alert)
        alertController.addAction(UIAlertAction.init(title: "确认", style: .cancel, handler: { (action) in

        }))
        self.present(alertController, animated: true, completion: nil)
    }
}

3. FFSpring中
   AppDelegate中

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    let url = url.absoluteString;
    let alertController = UIAlertController.init(title: "", message: url, preferredStyle: .alert)
    alertController.addAction(UIAlertAction.init(title: "确认", style: .cancel, handler:nil))

    let vc = app.keyWindow?.rootViewController as! ViewController
    vc.present(alertController, animated: true, completion: nil)

    if let data = UIPasteboard.general.data(forPasteboardType: "FFWinter") {
        vc.imgView.isHidden = false
        vc.imgView.image = UIImage.init(data: data)
    } else  {
        vc.imgView.isHidden = true
    }

    return false
}

vc中

@IBAction func openWinterAppClick(_ sender: Any) {
    let url = URL.init(string: "FFWinter://")!
    if UIApplication.shared.canOpenURL(url) {
        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    } else {
        let alertController = UIAlertController.init(title: "无法打开FFSpring", message: "", preferredStyle: .alert)
        alertController.addAction(UIAlertAction.init(title: "确认", style: .cancel, handler: nil))
        self.present(alertController, animated: true, completion: nil)
    }
}

即可实现文章开头的效果 ~

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