Go to the File inspector in interface builder, and untick &quot;Use Auto Layout&quot;.

![enter image description here][1]


  [1]: http://i.stack.imgur.com/eztg4.png

Go to the file inspector and uncheck the option &#39;Use Autolayout&#39; below Document versioning.

What&#39;s the recommended timestamp format for a REST GET API like this:

    http://api.example.com/start_date/{timestamp}

I think the actual date format should be ISO 8601 format, such as `YYYY-MM-DDThh:mm:ssZ` for UTC time.

Should we use the ISO 8601 version without hyphens and colons, such as:

    http://api.example.com/start_date/YYYYMMDDThhmmssZ

or should we encode the ISO 8601 format, using for example base64 encoding?

Recommended date format for REST GET API

In ASP.NET MVC, we have `@Url.Action` for actions. Is there something similar like `@Url.Api` which would route to /api/controller?

How to create ASP.NET Web API Url?

I&#39;m trying to make my project compatible with Snow Leopard and I am not able to remove the autolayout in the nibs using Interface builder (XCode 4.3 on Lion).

Is it possible to remove the constraints and the autolayout in a nib on XCode?

Remove autolayout (constraints) in Interface Builder

<p>I'm trying to make my project compatible with Snow Leopard and I am not able to remove the autolayout in the nibs using Interface builder (XCode 4.3 on Lion).</p>
<p>Is it possible to remove the constraints and the autolayout in a nib on XCode?</p>


I get the following error messages when I moved my code from my laptop to my Mac Mini and opened it over there:


&gt;myProject is locked for editing and you may not be able to save your changes?

---

&gt;myProject is currently locked because you are not the owner of the file and do not have write permission.

---------------

&gt;The file &quot;xxx.xcuserdatad&quot; could not be unlocked.
Could not add write permission to the file because you do not own it.  Try modifying the permission of the file in the Finder or Terminal.

---------------

I did a search with Finder:  What came up was a file called UserInterfaceState.xcuserstate inside of xxx.xcuserdatad... GetInfo showed the file not to be locked. 

However looking at the path(from GetInfo) showed the file to be within &quot;xxx.xcodeproj&quot; and further within &quot;project.xcworkspace/xcuserdata/xxx.xcuserdatad&quot;

I can&#39;t find this anywhere, and I don&#39;t know how to use my project on another computer.

myProject is locked for editing and you may not be able to save your changes?

Is it possible to segue from one storyboard to another, or to embed a storyboard in a view controller in another storyboard? I need to place a `UITabBarController` in a `UINavigationController`, and I&#39;d like to keep them nice and separate.

Segue to another storyboard?

Can someone explain what do these options in Xcode do?

* Enable Scribble
* Enable Guard Edges
* Enable Guard Malloc

what they are and what they do and how useful can they be for debugging/testing?

thanks.

Xcode - scribble, guard edges and guard malloc

OMG, what I&#39;ve done? 

Couple of days ago, I tried using macport to install something, because I&#39;m using Xcode 4.3 and the command-line tool hadn&#39;t been installed by the time, macport wouldn&#39;t work. So I followed some guide to get command-line tool installed, then I used following command:

    sudo xcode-select -switch /Applications/Xcode.app/

which I think screwed everything except macport: now, in Xcode, even a simple single-view iOS project won&#39;t be compiled, it says &quot;UIKit/UIKit.h not found&quot;.

Does anyone know how to correct this? I don&#39;t want to re-install the gigantic Xcode again, gotta do some iOS project tonight, help!

Xcode stops working after set &quot;xcode-select -switch&quot;

I still have Snow Leopard. I have Xcode 4.2 for iOS development. This morning I upgraded my iPhone and iPad to iOS 5.1. 

But Xcode 4.2 is not detecting my device for testing. I could not find the iOS 5.1 SDK image on Apple&#39;s developer site, for Xcode 4.2.

I don&#39;t want to do upgrade to Lion to get XCode 4.3 at this time.

Will I able to use Xcode 4.2 (on Snow Leopard) for iOS development now?

Is it possible to get the iOS 5.1 SDK for Xcode 4.2 on Snow Leopard?

I&#39;m looking for the best way to duplicate the Linux &#39;watch&#39; command on Mac&amp;nbsp;OS&amp;nbsp;X. I&#39;d like to run a command every few seconds to pattern match on the contents of an output file using &#39;tail&#39; and &#39;sed&#39;.

What&#39;s my best option on a Mac, and can it be done without downloading software?






OS X Bash, &#39;watch&#39; command

I&#39;m attempting to [re-install Ruby 1.9.3 with a patch that will allow me to use ruby-debug][1].

When following the instructions and running

    rvm reinstall 1.9.3 --patch debug --force-autoconf

It runs through and after applying the patch spits out:

&gt; rvm requires autoreconf to install the selected ruby interpreter however autoreconf was not found in the PATH.

Unfortunately, googling around for how to install autoreconf on OS&amp;nbsp;X&amp;nbsp;v10.7 (Lion) (or much information about it at all) seems to be a dead end.

  [1]: https://github.com/chuckg/chuckg.github.com/blob/master/ruby/193_and_rdebug.md


Install autoreconf on OS X v10.7 (Lion)?

I just upgraded XCode to 4.3.1.
I&#39;m using a script to build (and then deploy through Testflight) my app.
But I now receive this error:

&gt; Error: No developer directory found at /Developer. Run /usr/bin/xcode-select to update the developer directory path.

I&#39;ve no /Developer dir in my machine: how can I fix it?

How can I resolve &quot;Error: No developer directory found at /Developer&quot;?

My system&#39;s  date time is 26 May 22:55 but when i get date with `[NSDate date]` date time is 27 May 02:35 

is it  because of time zone ? 

if yes how to solve this problem, that when i get date time, give me the date of my system and doesn&#39;t check time zone

Get Current date &amp; time with [NSDate date]

I am trying to load parsed data in cells, but the problem is that it is happening synchronously and UitableView doesn&#39;t show until the data has finished loading. I tried to solve the problem by using performSelectorInBackground, but now data isn&#39;t loaded in the cells until I start scrolling. Here is my code:

    - (void)viewDidLoad
    {
        [super viewDidLoad];
    	// Do any additional setup after loading the view, typically from a nib.
        
        [self performSelectorInBackground:@selector(fethchData) withObject:nil];
            
    
    }
    
    
    - (void)viewDidUnload
    {
        [super viewDidUnload];
        // Release any retained subviews of the main view.
    self.listData = nil;
        self.plot=nil;
    }
    
    
    -(void) fethchData
    
    {
        NSError *error = nil;
        NSURL *url=[[NSURL alloc] initWithString:@&quot;http://www.website.com/&quot;];
        NSString *strin=[[NSString alloc] initWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
        
        HTMLParser *parser = [[HTMLParser alloc] initWithString:strin error:&amp;error];
        
        if (error) {
            NSLog(@&quot;Error: %@&quot;, error);
            return;
        }
        
        listData =[[NSMutableArray alloc] init];
        plot=[[NSMutableArray alloc] init];
        
        HTMLNode *bodyNode = [parser body];
        NSArray *contentNodes = [bodyNode findChildTags:@&quot;p&quot;];
        
        
        for (HTMLNode *inputNode in contentNodes) {
                [plot addObject:[[inputNode allContents] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];    
            }
          
        
        NSArray *divNodes = [bodyNode findChildTags:@&quot;h2&quot;];
        
        for (HTMLNode *inputNode in divNodes) {
           
                [listData addObject:[[inputNode allContents] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];          
                
            }
        }
        
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
    {
        
        static NSString *CellIdentifier = @&quot;Cell&quot;;
        //here you check for PreCreated cell.
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil) {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
            cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
           
        }
        
        //Fill the cells...  
        
       
        cell.textLabel.text = [listData objectAtIndex:indexPath.row];
        cell.textLabel.font = [UIFont boldSystemFontOfSize:14];
        cell.textLabel.numberOfLines=6; 
        cell.textLabel.textColor=[UIColor colorWithHue:0.7 saturation:1 brightness:0.4 alpha:1];
     
        
        cell.detailTextLabel.text=[plot objectAtIndex:indexPath.row];
        cell.detailTextLabel.font=[UIFont systemFontOfSize:11];
        cell.detailTextLabel.numberOfLines=6;
       
        return cell;
        
    
    }



Data doesn&#39;t load in UITableView until I scroll

I have used NSSets many times in my apps, but I have never created one myself. 

When is it better to use an [`NSSet`][1] as opposed to an [`NSArray`][2] and why?

  [1]: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSSet_Class/
  [2]: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/index.html#//apple_ref/doc/c_ref/NSArray



When is it better to use an NSSet over an NSArray?

It looks like `aspect fit` aligns the image to the bottom of the frame by default. Is there a way to *override* the alignment while keeping `aspect fit` intact?

** EDIT **

*This question predates auto layout. In fact, auto layout was being revealed in WWDC 2012 the same week this question was asked*

UIImage aspect fit and align to top

The Gestalt() function located in `CarbonCore/OSUtils.h` has been deprecated as of OS X 10.8 Mountain Lion.

I often use this function to test the version of the OS X operating system at runtime (see the toy example below).

What other API could be used to check the OS X operating system version at runtime in a Cocoa application?

    int main() {
        SInt32 versMaj, versMin, versBugFix;
        Gestalt(gestaltSystemVersionMajor, &amp;versMaj);
        Gestalt(gestaltSystemVersionMinor, &amp;versMin);
        Gestalt(gestaltSystemVersionBugFix, &amp;versBugFix);

        printf(&quot;OS X Version: %d.%d.%d\n&quot;, versMaj, versMin, versBugFix);
    }

How do I determine the OS version at runtime in OS X or iOS (without using Gestalt)?

I&#39;m trying to create a container view controller using `iOS5` and new methods like `addChildViewController`.

Do I have to call `addSubview` after calling `addChildViewController`?

Do I have to call `removeFromSuperview` before calling `removeChildViewController`?

I don&#39;t see anything about this in Apple docs.
What do you think?

Do I have to call addSubview after calling addChildViewController?

I would like to display a unicode character (the speaker symbol U+1F50A) in label.
Is it possible to enter this symbol in Interface Builder?



How to enter unicode characters in a UILabel in Interface Builder?

I have a view that needs to have its frame manipulated programmatically - it&#39;s a kind of document view that wraps to its content which is then scrolled and zoomed around a superview by manipulating the frame origin. Autolayout fights with this at runtime.

Disabling autolayout completely seems a bit harsh because it could reasonably be used to handle layout for the other views. It seems like what I might want is some kind of &quot;null constraint&quot;.


Can I disable autolayout for a specific subview at runtime?

What I&#39;d like to do is drag a component/view from one superview to another in Xcode&#39;s interface-builder without having its frame/position be reset.  

Xcode&#39;s default behavior when doing this appears to be to center the view being moved vertically and horizontally in its new superview, while preserving its dimensions. This is extremely frustrating, as it means that the view needs to be manually repositioned in its new superview. But I had it positioned correctly before I moved it, so I&#39;d like Xcode to just remember all attributes of its frame instead of just its width/height. Is this possible?

Xcode - Is there a way to drag a component from one view to another without losing its frame?

Is it possible to control UIView border properties (color, thickness, etc...) directly from interface builder or I can only do it programmatically?

Is it possible to set UIView border properties from interface builder?

I recently upgraded my laptop to Snow Leopard, updated TeX to Version 3.1415926 (TeX Live 2011/MacPorts 2011_5), and installed Python 2.7.3.  After all these installs, I ran macport selfupdate and macport upgrade outdated.  However, now when I try to use TeX in matplotlib, I receive the following:

    LaTeX was not able to process the following string:&#39;lp&#39;
    Here is the full report generated by LaTeX: 

    This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011/MacPorts 2011_5)
     restricted \write18 enabled.  
    entering extended mode (./64a53cc27244d5ee10969789771e33fa.tex
    LaTeX2e &lt;2009/09/24&gt;
    Babel &lt;v3.8l&gt; and hyphenation patterns for english, dumylang, nohyphenation, cz
    ech, slovak, dutch, ukenglish, usenglishmax, basque, french, german-x-2009-06-1
    9, ngerman-x-2009-06-19, german, ngerman, swissgerman, italian, polish, portugu
    ese, spanish, catalan, galician, ukenglish, loaded.
    (/opt/local/share/texmf-texlive-dist/tex/latex/base/article.cls
    Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
    (/opt/local/share/texmf-texlive-dist/tex/latex/base/size10.clo))

    ! LaTeX Error: File `type1cm.sty&#39; not found.

    Type X to quit or &lt;RETURN&gt; to proceed, or enter new name. (Default extension: sty)

         
    l.3 \renewcommand
                 {\rmdefault}{pnc}^^M
    No pages of output.



Similar to [this previous question](https://stackoverflow.com/questions/6082126/tex-in-matplotlib-on-mac-os-x-and-tex-live), I tried setting the path in my python code via:

    os.environ[&#39;PATH&#39;] = os.environ[&#39;PATH&#39;] + &#39;:/opt/local/bin/latex&#39;
since `which latex` yielded `/opt/local/bin/latex`.  However, that didn&#39;t work, with the same error message.  I also tried the path to tex, as well as the example from the previous question.  No change.

I then tried to force possibly missing packages via:

    matplotlib.rcParams[&#39;text.latex.preamble&#39;]=[r&quot;\usepackage{amsmath}&quot;]
however, that also did not work. 

The only way I can get my plots to work is to say `rc(&#39;text&#39;, usetex=False)`, which is not ideal.  Any help would be much appreciated.


Python: Unable to Render Tex in Matplotlib

Like some others I am getting this error when I run rake db:migrate in my project or even try most database tasks for my [Ruby on Rails][1] 3.2 applications.

&gt; PGError (could not connect to server: No such file or directory. Is the
&gt; server running locally and accepting connections on Unix domain socket
&gt; &quot;/tmp/.s.PGSQL.5432&quot;?

I installed [PostgreSQL][2] with [Homebrew][3] a long time ago and following an attempted installation of [MongoDB][4] recently my PostgreSQL install has never been the same. I&#39;m running OS&amp;nbsp;X&amp;nbsp;v10.6 Snow&amp;nbsp;Leopard.

What&#39;s wrong and how do I better understand how PostgreSQL is and should be setup on my Mac?

So far (I think) this tells me that PostgreSQL is not running(?).

    ps -aef|grep postgres                                                                                                   (ruby-1.9.2-p320@jct-ana) (develop) ✗
      501 17604 11329   0   0:00.00 ttys001    0:00.00 grep postgres

But does this tell me that PostgreSQL is running?

    ✪ launchctl load -w /usr/local/Cellar/postgresql/9.1.4/homebrew.mxcl.postgresql.plist                                                        (ruby-1.9.2-p136) 
    homebrew.mxcl.postgresql: Already loaded

How do I fix this? what am I not seeing?

PS: `~/Library/LaunchAgents` includes two PostgreSQL .plist files. I am not sure if that&#39;s relevant.

    org.postgresql.postgres.plist
    homebrew.mxcl.postgresql.plist

I tried the following and got a result as below.

**$ psql -p 5432 -h localhost**   

    psql: could not connect to server: Connection refused
    	Is the server running on host &quot;localhost&quot; (127.0.0.1) and accepting
    	TCP/IP connections on port 5432?
    could not connect to server: Connection refused
    	Is the server running on host &quot;localhost&quot; (::1) and accepting
    	TCP/IP connections on port 5432?
    could not connect to server: Connection refused
    	Is the server running on host &quot;localhost&quot; (fe80::1) and accepting
    	TCP/IP connections on port 5432?

I&#39;ve read since that this is occuring because OS&amp;nbsp;X installs its own version of PostgreSQL and Homebrew installs a different version in a different place and the PostgreSQL commands are looking in the /tmp/ directory. You&#39;ll need to search more on Stack&amp;nbsp;Overflow, but basically you symlink PostgreSQL so that anything looking in that tmp path actually finds the real path, if that makes sense.

This is the link where I found a few more things to try, specifically doing the symlink as per above, *https://stackoverflow.com/questions/17240516*. I still wish someone would put together a decent explanation of the concepts behind installing PostgreSQL on OS&amp;nbsp;X and why it&#39;s all so difficult.

Latest insights to help with troubleshooting:
 
    $ which psql // This tells you which PostgreSQL you are using when you run $ psql. 

Then run:

    $ echo $PATH

The key thing to take into account is this:

**Ensure that the path entry for the copy of PostgreSQL you want to run COMES BEFORE the path to the OS&amp;nbsp;X system&#39;s PostgreSQL.**

This is a core requirement which decides which PostgreSQL gets run and is what I&#39;m told leads to most of these issues.

  [1]: http://en.wikipedia.org/wiki/Ruby_on_Rails
  [2]: http://en.wikipedia.org/wiki/PostgreSQL
  [3]: https://en.wikipedia.org/wiki/Homebrew_%28package_management_software%29
  [4]: http://en.wikipedia.org/wiki/MongoDB


PostgreSQL error &#39;Could not connect to server: No such file or directory&#39;

My Mac currently is running Snow Leopard (10.6.8), and I would like to develop with Java 7. I downloaded the Java 7 OS X installer from [Oracle&#39;s website][1], started to run it. Unfortunately, I was immediately greeted with a message that said the installer is supported only on OS X Lion (10.7.3). Is there any way I can get Java 7 on my machine with Snow Leopard? I am not buying a new OS just to upgrade my Java. I googled around some, but I am not finding much. I&#39;m hoping I can find some help here. Thanks. 


  [1]: http://www.oracle.com/technetwork/java/javase/downloads/jdk7u9-downloads-1859576.html

How to install java jdk 7 on Snow Leopard

How can I get `homebrew` to list out all files installed for a package? For example, when I run `brew list` for the exim package, I get these files:

    $ brew list exim
    /usr/local/Cellar/exim/4.80.1/bin/exiwhat
    /usr/local/Cellar/exim/4.80.1/bin/exiqsumm
    /usr/local/Cellar/exim/4.80.1/bin/exiqgrep
    /usr/local/Cellar/exim/4.80.1/bin/exipick
    /usr/local/Cellar/exim/4.80.1/bin/exinext
    /usr/local/Cellar/exim/4.80.1/bin/eximstats
    /usr/local/Cellar/exim/4.80.1/bin/exim_tidydb
    /usr/local/Cellar/exim/4.80.1/bin/exim_lock
    /usr/local/Cellar/exim/4.80.1/bin/exim_fixdb
    /usr/local/Cellar/exim/4.80.1/bin/exim_dumpdb
    /usr/local/Cellar/exim/4.80.1/bin/exim_dbmbuild
    /usr/local/Cellar/exim/4.80.1/bin/exim_ctl
    /usr/local/Cellar/exim/4.80.1/bin/exim_checkaccess
    /usr/local/Cellar/exim/4.80.1/bin/exim-4.80.1-3
    /usr/local/Cellar/exim/4.80.1/bin/exim
    /usr/local/Cellar/exim/4.80.1/bin/exigrep
    /usr/local/Cellar/exim/4.80.1/bin/exicyclog
    /usr/local/Cellar/exim/4.80.1/share/man/man8/exim.8


But there are files added to the system that is not in the list above. For example:

    $ ls -ld /usr/local/etc/exim.conf 
    -rw-r--r--  1 hanxue  admin  35904 Sep 25 21:11 /usr/local/etc/exim.conf






Content Type	Original Author	Original Content on Stackoverflow
Question	Olof	View Question on Stackoverflow
Solution 1 - Xcode	Olof	View Answer on Stackoverflow
Solution 2 - Xcode	GSD	View Answer on Stackoverflow

Remove autolayout (constraints) in Interface Builder

Xcode Problem Overview

Xcode Solutions

Solution 1 - Xcode

Solution 2 - Xcode

How to create ASP.NET Web API Url?

Recommended date format for REST GET API

Attributions