Xcode 4 places its build products and other intermediaries/temporary files/indexes in a derived data directory now instead of a &quot;build&quot; directory that is mixed in with your product files. It does this to deal with the new workspaces and also so that you can have clean builds of different projects in different workspaces without contaminating each other.

If your original template was old, your built product is probably relative to your source directory instead of relative to your built products directory, which is why it&#39;s showing up red. By default, your derived data directory will be under ~/Library/Developer/Xcode/DerivedData. To see where your current workspace/project is placing these files, you can **File-&gt;Workspace Settings...** and take a look at the *Build Location*.

I was having this problem. not only the product .app was red, also simulator wasn&#39;t loaded the binary, it was stuck in attaching &#39;my app&#39;. 
i solved it by going to file-&gt;project settings. in the tab &#39;build&#39; changed derived data location to &#39;project-relative&#39;, and in advanced changed build location to &#39;locations specified by targets&#39;. 
with the default options it wasn&#39;t possible to run the app, i&#39;m not sure why.

To resolve the issue in XCode 4.x go through following steps :-

Open your project in XCode.

Select .xcodeproj file in XCode project Navigator.

Select the target under the PROJECT Heading. (i.e. the top most target, this target specify your project level build settings)

Now navigate to Build Settings.

Now search for option &quot;Per-Configuration Build Products Path&quot; and update it&#39;s value to $(SYMROOT) .






I am using the Generic Repository pattern on top of Entity Framework Code First. Everything was working fine until I needed to include more entities in a query. I got to include one entity successfully, but now I can&#39;t figure out how to include multiple entities. Check out what I&#39;ve got so far:

    public IQueryable&lt;TEntity&gt; GetQuery&lt;TEntity&gt;() where TEntity : class
    {
        var entityName = GetEntityName&lt;TEntity&gt;();
        return _objectContext.CreateQuery&lt;TEntity&gt;(entityName);
    }
    
    public IList&lt;TEntity&gt; GetQueryWithInclude&lt;TEntity&gt;(string toInclude) where TEntity : class
    {
        var entityName = GetEntityName&lt;TEntity&gt;();
        return _objectContext.CreateQuery&lt;TEntity&gt;(entityName).Include(toInclude).ToList();
    }
    
    private string GetEntityName&lt;TEntity&gt;() where TEntity : class
    {
        return string.Format(&quot;{0}.{1}&quot;, _objectContext.DefaultContainerName, _pluralizer.Pluralize(typeof(TEntity).Name));
    }

What I tried to do but didn&#39;t work was pass in an array of strings into a function, then try to &quot;append&quot; the includes on top of the query. I was wondering what if I called the GetQueryWithInclude and passed an entity name (actually a navigation property) at a time to aggregate the results of the query, but I&#39;m worried this might duplicate the results of the query on each call... What do you think would be the best way to get this to work?

Thanks in advance!

**UPDATE:**

Here&#39;s an example of what I&#39;m trying to achieve:


    public IQueryable GetQueryWithIncludes(string[] otherEntities)
    {
        var entityName = GetEntityName&lt;TEntity&gt;();
        //now loop over the otherEntities array 
        //and append Include extensions to the query
        //so inside the loop, something like: 
        _objectContext.GetQuery&lt;TEntity&gt;(entityName).Include(otherEntities[index]);
    }

EF Including Other Entities (Generic Repository pattern)

I saw it [suggested on a blog][1] that the following was a reasonable way to do a &quot;reverse-lookup&quot; using the `getCode(int)` in a Java enum:

	public enum Status {
		WAITING(0),
		READY(1),
		SKIPPED(-1),
		COMPLETED(5);

		private static final Map&lt;Integer,Status&gt; lookup 
				= new HashMap&lt;Integer,Status&gt;();

		static {
			for(Status s : EnumSet.allOf(Status.class))
				lookup.put(s.getCode(), s);
		}

		private int code;

		private Status(int code) {
			this.code = code;
		}

		public int getCode() { return code; }

		public static Status get(int code) { 
			return lookup.get(code); 
		}
	}

To me, the static map and the static initializer both look like a bad idea, and my first thought would be to code the lookup as so:

	public enum Status {
		WAITING(0),
		READY(1),
		SKIPPED(-1),
		COMPLETED(5);

		private int code;

		private Status(int code) {
			this.code = code;
		}

		public int getCode() { return code; }

		public static Status get(int code) { 
			for(Status s : values()) {
				if(s.code == code) return s;
			}
			return null;
		}
	}

Are there any obvious problems with either method, and is there a recommended way to implement this kind of lookup?

[1]: http://www.ajaxonomy.com/2007/java/making-the-most-of-java-50-enum-tricks

Java enum reverse look-up best practice

Regardless of build configuration, building my iPad app does not actually output a .app file.  It does run in the iPad simulator and on a device, but when I hit build or build and run, the binary appears under Products in red and is not created in the &quot;build&quot; folder as designated in build settings.

Any ideas?

Why doesn&#39;t Xcode 4 create any products?

<p>Regardless of build configuration, building my iPad app does not actually output a .app file.  It does run in the iPad simulator and on a device, but when I hit build or build and run, the binary appears under Products in red and is not created in the "build" folder as designated in build settings.</p>
<p>Any ideas?</p>


Since Apple only ships SDK 10.6 with Xcode4, developing PPC applications with Xcode4 became impossible. While it is possible to develop applications with Xcode4 that can also run on 10.5 and maybe even on 10.4 systems (by selecting SDK 10.6, but deployment target 10.5 or 10.4), they will only run on Intel Macs because you need at least SDK 10.5 for building PPC applications.

Further there are some rare cases, where you really need to build against an SDK prior to 10.6 for full platform support, e.g. if certain deprecated functionality has vanished completely from the 10.6 SDK, but you&#39;ll have to use it and dynamic linking is not always the best option in those cases. Also linking against an earlier SDK sometimes will ease development as functionality you are not supposed to use, as it would cause incompatibility to earlier OS versions, won&#39;t be available and any attempt to use it anyhow immediately leads to compiler or linker errors.

Last but not least Apple has also removed GCC 4.0 support from Xcode4, which may be necessary for certain software to build correctly and Apple has never allowed to compile software with GCC 4.2 when using SDK 10.4, even though I hardly believe that this would really cause any issues, after all software built with GCC 4.2 and SDK 10.6 can also run on Mac OS 10.4 without any issues as long as the deployment target has been set correctly and no functionality that is unavailable under MacOS 10.4 has been used.

Of course you can always have a parallel installation of Xcode3 next to Xcode4, but that means you must forgo all the (great?) new features of Xcode4 and keep working with the outdated Xcode3 IDE. It would certainly be much better if you could also manage all your old projects within the same IDE as your new ones and benefit from any new features available. Not all projects can be made 10.6 or Intel only in the foreseeable future. Further I&#39;m strictly against abolishing support for older platforms earlier than would be really necessary.

**Can we restore this functionality to Xcode4?**

How can we restore ppc/ppc64 as well as full 10.4/10.5 SDK support to Xcode 4?

Just installed Xcode 4 so far so good, except that Apple changed all the keyboard shortcuts! Anyone know how to toggle between .h and .m?

How to toggle between .h and .m in Xcode 4

I am trying to integrate Janrain Engage as custom module with Appcelerator Titanium. I have created a sample module and dragged the JREngage folder to the sample module xcodeproj as indicated in the Jainrain&#39;s documentation. 

Now I give build command to this project, then execute the `./build.py` and then finally I execute the `titanium run` command. It launches the application in simulator with a blank screen and immediately crashes throwing the following error.


&gt; Terminating app due to uncaught exception &#39;NSInternalInconsistencyException&#39;, reason: &#39;Could not load NIB in bundle: &#39;NSBundle &amp;lt;/Users/abhilash/Library/Application Support/iPhone Simulator/4.2/Applications/CA167346-4091-4E16-B841-955D1D391713/test.app&amp;gt; (loaded)&#39; with name &#39;JRProvidersController&#39;&#39;


Why could this error be occurring? 

Could not load NIB in bundle

I&#39;m getting this warning when I&#39;m calling a local routine.

My code is this:

    -(void)nextLetter {
    	// NSLog(@&quot;%s&quot;, __FUNCTION__);
    	currentLetter ++;
    	if(currentLetter &gt; (letters.count - 1))
    	{
    		currentLetter = 0;
    	}
    	self.fetchLetter;
    }

I&#39;m getting the warning on the self.fetchLetter statement.

That routine looks like this:

    - (void)fetchLetter {
    	// NSLog(@&quot;%s&quot;, __FUNCTION__);
    	NSString *wantedLetter = [[letters objectAtIndex: currentLetter] objectForKey: @&quot;langLetter&quot;];
    	
    	NSString *wantedUpperCase = [[letters objectAtIndex: currentLetter] objectForKey: @&quot;upperCase&quot;];	
    	
    
    .....	
    }

I prefer to fix warning messages, is there a better way to write this?

Thanks!	

 

Xcode warning &quot;Property access results unused - getters should not be used for side effects&quot;

I&#39;ve been looking all over Xcode for this, but I can&#39;t find any place that allows you to rename an existing scheme in Xcode 4. Is this even possible?


Is there a way to rename an Xcode 4 scheme?

Is there a way to check if a modal view is present? I&#39;d like to run a method only if a modal view is present. Also, if I have multiple modal views, is there a way to check if a certain modal view is present.

I use the following code to present and dismiss modal views:

        [self presentModalViewController:myModalView animated:YES];
        [self dismissModalViewControllerAnimated:YES];
    

Thank you in advance!

Cheers,
Evan

PS. My modal view has a view controller, but I&#39;d like to check if the modal view is present from a separate class that is running asynchronously.

iOS - How to check if a modal view is present

I have heard people state that method swizzling is a dangerous practice. Even the name swizzling suggests that it is a bit of a cheat.

[Method Swizzling][1] is modifying the mapping so that calling selector A will actually invoke implementation B. One use of this is to extend behavior of closed source classes. 

Can we formalise the risks so that anyone who is deciding whether to use swizzling can make an informed decision whether it is worth it for what they are trying to do.

E.g.

 * **Naming Collisions**: If the class later extends its functionality to include the method name that you have added, it will cause a huge manner of problems. Reduce the risk by sensibly naming swizzled methods.


  [1]: https://web.archive.org/web/20130308110627/http://cocoadev.com/wiki/MethodSwizzling

What are the Dangers of Method Swizzling in Objective-C?

I have a view with about 30 subviews on it.  I want to add code in my subview&#39;s viewcontroller so that when I tap the subview, the subview expands to fill the screen.

I&#39;m using `[self.view setFrame:rect]` to expand the subview, and this works fine.  The problem is that some of the other 29 subviews are above the subview that I just tapped, so they&#39;re still visible.

I&#39;ve tried using `bringSubviewToFront` from the parent viewcontroller, but this appears to have no effect.  Is there any code I can put in my subview&#39;s viewcontroller class to make this happen?

How to bring a subview to the front when you tap it?

I just updated to Xcode 4.

Normally when localizing apps we add &quot;Localizable.String&quot; file to the project, and then navigate to &quot;Get Info&quot; menu and click the &quot;Make It Localized&quot; button.

However, in Xcode 4, there is no &quot;Get Info&quot; menu.

When I try to add a language it only effects the &quot;InfoPlist.String&quot; file (which can only localize the app&#39;s name).

How may I add localization to my app in Xcode 4?

Localizing in Xcode 4 with Localizable.String

Xcode finally added tabs but the problem is that they behave very strange. For example they will keep a tab open only if it was opened to a new tab.

If you open a file just by clicking in the project tree, Xcode will close your tab as soon as you are clicking on another file in the tree.

Is is possible to make them behave like real tabs and prevent Xcode from reusing them? How?


How can I make the tabs work normally on Xcode 4?

The app works fine in the simulator, builds and runs.

When I attach my device (iPhone 3GS running iOS 4.3) and target the iPhone, the result is &quot;Build failed&quot; with &quot;No issues&quot;.

Looking at the build results window, everything is green, has a checkmark, *including the Build failed notice*.

Expanding the transcripts show no errors.

I cannot exclude the possibility of a signing or provisioning error, but it gave me those errors, I ironed them out, and now it&#39;s not giving me any errors or issues, just &quot;Build failed; No issues&quot;

* In what ways can the build fail with no issues?
* Is there a way I can watch the build output to see if I can find the reason it&#39;s failing with no issues?
* Is there build output produced beyond the issues list?
* I don&#39;t see on the build window where it attempts to load the app onto my device - is this output elsewhere?

Content Type	Original Author	Original Content on Stackoverflow
Question	Tiki	View Question on Stackoverflow
Solution 1 - Xcode	Jason Coco	View Answer on Stackoverflow
Solution 2 - Xcode	Alexander Fradiani	View Answer on Stackoverflow
Solution 3 - Xcode	Anshul Sharma	View Answer on Stackoverflow

Why doesn't Xcode 4 create any products?

Xcode Problem Overview

Xcode Solutions

Solution 1 - Xcode

Solution 2 - Xcode

Solution 3 - Xcode

Java enum reverse look-up best practice

EF Including Other Entities (Generic Repository pattern)

Attributions