iOS canOpenURL返回true，但未安装应用程序(facebook) [英] iOS canOpenURL returns true, but app is not installed(facebook)

问题描述

当前，我想检查我的应用程序是否安装了Facebook App.

Currently, I want to check in my app whether Facebook App is installed or not.

我在做什么:

UIApplication.shared.canOpenURL(URL(string: "fb://")!)enter code here

在URL方案中，我添加了fb，所以也不要错过该部分.

In URL Schemes I have added fb, so not missed that part too.

但是canOpenURL返回TRUE！但是该应用程序未安装.我重新启动设备，没有帮助.为什么会这样呢? 更新:一些代码

But canOpenURL RETURNS TRUE ! But the app IS UNinstalled. I restarted the device, not helped. Why this is happening? UPDATE: some code

if UIApplication.shared.canOpenURL(URL(string: "fb://")!) {
    self.shareToFacebook(with: completion)
} else {
    progressVC.dismiss(animated: false, completion: nil)
    UIApplication.shared.open(URL(string: "https://itunes.apple.com/us/app/facebook/id284882215")!)
}

解决方案:我找到了解决方案的人.在URL类型中，我添加了fb45 ....(我的应用程序的ID)，还添加了fb(不应存在的那个)，我删除了fb，只保留了ID，所以openURL现在返回false如果未安装该应用程序

SOLUTION: I found the solution people. In URL types I had been added fb45....(id of my app), and also added fb, which one shouldn't be there, I removed fb, and only kept the one with id, so the openURL now returns false if the app is not installed

推荐答案

您需要将fb添加到应用程序plist中的LSApplicationQueriesSchemes数组中，而不是URL schemes数组中，如下所示:

You need to add fb to the LSApplicationQueriesSchemes array in the app plist, not the URL schemes array, like so:

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>fb</string>
</array>

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