小编Ank*_*tri的帖子

我有一个表'propertyvalues'如下:

ID  FileID  Property  Value

 1   x       Name      1.pdf

 2   x       Size      12567

 3   x       Type      application/pdf

 4   y       Name      2.pdf

 5   y       Size      23576

 6   y       Type      application/pdf

......

and so on

如何在上面的表上编写SQL查询以获取如下所示的结果

 
FileID  Name     Size      Type

  x     1.pdf    12567     application/pdf

  y     2.pdf    23576     application/pdf

我在Google Play上发布了一款应用.我想要一个网址,将用户重定向到Google Play上应用页面上的评论标签!

在发布应用程序的文档中,有用于将用户重定向到应用程序的详细信息选项卡(默认)的URL.我希望当用户点击我将在某些网页上发布的链接(例如"撰写评论")时,着陆页shouuld会在Google Play上的应用页面上打开评论标签!

我正在尝试存档我的第一个iOS项目,我收到以下错误.似乎我用于身份验证的Facebook SDK和Google Plus SDK存在一些问题.我在stackoverflow上遇到过类似的问题,但没有一个解决方案对我有帮助.任何帮助,将不胜感激.提前致谢.

<pre>
Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_FBRequest", referenced from:
      objc-class-ref in LoginViewController.o
  "_OBJC_CLASS_$_GTMLogger", referenced from:
      objc-class-ref in LoginViewController.o
  "_OBJC_CLASS_$_GTLQueryPlus", referenced from:
      objc-class-ref in LoginViewController.o
  "_kGTLAuthScopePlusLogin", referenced from:
      -[LoginViewController getInfoForGoogle] in LoginViewController.o
  "_OBJC_CLASS_$_GTLServicePlus", referenced from:
      objc-class-ref in LoginViewController.o
  "_OBJC_CLASS_$_GPPURLHandler", referenced from:
      objc-class-ref in AppDelegate.o
  "_OBJC_CLASS_$_GPPSignIn", referenced from:
      objc-class-ref in LoginViewController.o
  "_OBJC_CLASS_$_FBSession", referenced from:
      objc-class-ref in AppDelegate.o
      objc-class-ref in LoginViewController.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v …