我通过将iPad连接到计算机并在试图安装应用程序时通过XCode Organizer查看控制台发现了这个问题。错误原来是:

无法加载非https清单URL: http://example.com/manifest.plist

在iOS 7.1中，清单的URL。plist文件必须是HTTPS，而我们使用的是HTTP。将URL更改为HTTPS解决了这个问题。

I.e.

itms-services://?action=download-manifest&url=http://example.com/manifest.plist

就变成了

itms-services://?action=download-manifest&url=https://example.com/manifest.plist

我假设您必须拥有有关域的有效SSL证书。我们已经做过了，但我想没有它你会有问题。

一些好人通过使用Class 1 StartSSL证书和共享Apache配置来处理这个问题，该配置添加了证书支持(将与任何证书一起工作)和更改现有*中的链接的代码。Plist自动文件。太长了，不能复制，所以这里是链接: http://cases.azoft.com/how-to-fix-certificate-is-not-valid-error-on-ios-7/

通用的解决方案是将你的设备连接到Mac上，然后观察安装过程中发生了什么。我得到一个错误:

Could not load download manifest with underlying error: Error Domain=NSURLErrorDomain Code=-1202 "Cannot connect to the Store" UserInfo=0x146635d0 {NSLocalizedDescription=Cannot connect to the Store, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, NSLocalizedFailureReason=A secure connection could not be established. Please check your Date & Time settings., NSErrorFailingURLStringKey=https://myserver.com/app/manifest.plist, NSUnderlyingError=0x14678880 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “myserver.com” which could put your confidential information at risk.", NSURLErrorFailingURLPeerTrustErrorKey=, NSErrorFailingURLKey=https://myserver.com/app/manifest.plist}

错误中甚至有检查日期设置的建议。不知什么原因，那天是1970年1月1日。设置正确的日期就解决了这个问题。

我也遇到了同样的麻烦，照上面说的做了。

Put the plist in dropbox. Over the download file button, below an image of the document with mouse right button select the copy link action. This link is already something like https://dl.dropboxusercontent.com/s/xyz123/app.plist?stuff=stuff with many params. Remove the parameters (kept only address between https and .plist) Browse for url encode online, selected one of those links, copy, paste, execute, then the resulting text copied and pasted into the html where I have the itms-services link. By the way I have this html in two different locations, one of those is where the ipa is located. Make sure the plist includes absolute references to the ipa file.

这两个页面都成功地在ios 7.1的iphone上安装了应用程序

但是，现在安装了ios 7.0x的iphone无法安装该应用程序。

我创建了一个新问题:升级后的adhoc应用部署在7.1之前的ios上无法工作

这两个问题紧密相关，也因缺乏官方参考而联系在一起。

Our team uses dropbox for ad-hoc distribution which uses https but still our app was failing to install. After much trouble-shooting we realized that the title field is required too. Whenever we sent out a link without this field safari ignored the link and did not prompt the user to install. Sometimes for quick development tests we skipped over the title node in the xml and not populate it. In case this is helpful for anyone having this issue make sure that your .plist contains the following nodes populated:

      ....
     <string>software</string>
    <key>title</key>
     <string>Your App Name</string>
      ...

除了使用Dropbox进行企业推广，你还可以使用TestFlight进行企业签名应用的推广。

https://www.testflightapp.com/

对于托管和分发临时开发版本和企业版本来说，这是一个非常棒的服务。