I created a project without ARC. I want to use a third party SDK in my project. That SDK comes with ARC Support. So I want to add ARC for that third party files. I can disable ARC for all "MYProject" files by adding this flag into build phases like -fno-objc-arc.
But I may use large number of files. So it's better to add ARC for specific SDK only. So how to add ARC support for single or specific SDK files in XCode Project?
For Instance: I want to use Grid View. I'm adding GMGridView in my project and it comes with ARC support.
Add the flag -fobjc-arc to the files that you'd like to use ARC. It's just the opposite of the other.
You add compiler flags in Targets -> Build Phases -> Compile Sources
Compile source show all file that project contain.so please add -fobjc-arc to compiler flag by double clicking on it as show in below image.
Related
I want to use a graph in my iPhone app. I have downloaded the source code Core- Plot for it, but now when I am trying to run it I am getting an error.
clang: error: -Z-reserved-lib-stdc++: 'linker' input unused when '-c' is present
Can anyone suggest me what this error mean or how to resolve it.
`iPhone, iPod Touch, and/or iPad Application
Dependent Project Install
Because frameworks cannot be used in Cocoa Touch applications in the same way as on the Mac, the means of including Core Plot within an iPhone application are slightly different.
First, drag the CorePlot-CocoaTouch.xcodeproj file into your iPhone application's Xcode project. Show the project navigator in the left-hand list and click on your project.
Select your application target from under the "Targets" source list that appears. Click on the "Build Phases" tab and expand the "Target Dependencies" group. Click on the plus button, select the CorePlot-CocoaTouch library, and click Add. This should ensure that the Core Plot library will be built with your application.
Core Plot is built as a static library for iPhone, so you'll need to drag the libCorePlot-CocoaTouch.a static library from under the CorePlot-CocoaTouch.xcodeproj group to the "Link Binaries With Libraries" group within the application target's "Build Phases" group you were just in.
You'll also need to point to the right header location. Under your Build settings, set the Header Search Paths to the relative path from your application to the framework/ subdirectory within the Core Plot source tree. Make sure to make this header search path recursive. You need to add -ObjC to Other Linker Flags as well (as of Xcode 4.2, -all_load does not seem to be needed, but it may be required for older Xcode versions).
Core Plot is based on Core Animation, so if you haven't already, add the QuartzCore framework to your application project.
Finally, you should be able to import all of the Core Plot classes and data types by inserting the following line in the appropriate source files within your project:
import "CorePlot-CocoaTouch.h"`
Source: core plot wiki on google
I got a solution for it here is the link.
CorePlot failed to build in XCode 4.4
Basically the issue was related to Xcode.
Now I have a Xcode project which is built for iOS 5, but now i have to install it on an iPhone 3GS, which has a older iOS. I came to know that this is because I am using ARC in this project and it is not available in iOS 3.2. How can I remove ARC from my current project?
If you want it disabled for the whole project, you need to go to the target's build settings and set it to No
very simple first go to targets in that go "buldphases"-->compileSource--> here "yourfile.m" --> set value
-fno-objc-arc(only particular files )
if u want remove ARC in entire project go to targets in that go "buldsettings" ---> objective-c automaticrefcount :NO
In XCode, there is a global compiler flag called -fobjc-arc. If you disable this (-fno-objc-arc), ARC will be disabled in your whole project. If only a few files don't support ARC, use the -fno-objc-arc flag on those files only. The last flag "wins", see http://clang.llvm.org/docs/AutomaticReferenceCounting.html#general.
However, make sure that you know what you're doing! If the project was designed around ARC, there may not be any deallocation-code in there, including dealloc methods. Also, your properties might be unsupported (strong, weak etc.). You'll most likely end up in a complete mess.
Your best bet would be to just upgrade your 3GS.
Go
Build Settings
make sure "all" option is selected
search for automatic you will find Objective-c Automatic Reference counting set NO
Actually i came to this question when i was trying to add some classes that have been made upon ios prior to IOS 5 and these classes doesn't having ARC and the project i am trying to add is made upon the IOS 5 and it give me the compile time error related to ARC the classes having suck kind of information that if i try to remove the release/retain then it start behaving irregular.That is my problem, Now come to question i want to know that is there any way so that i can mark those classes not to use ARC so that the newly created classes that having base SDK ios5 compile with ARC and i mention not to use ARC simply compiled with their retain/release values.That is the only way i have left i think for making properly this app.
Any idea how i can use those classes that is having base sdk prior to ios5.
Thanks,
the image below will show you how to do it.
-fno-objc-arc flag to disbale arc
-fobjc-arc flag to enable arc
Go to your project settings, under Build Phases > Compile Sources
Select the files you want ARC disabled and add -fno-objc-arc compiler flags. You can set flags for multiple files in one shot by selecting the files then hit Enter key.
Go to Issue Navigator -> Validate project settings -> Perform changes. In this way Xcode automatically remove release and retain keywords from whole project and convert into ARC compatible.
My project uses the ARC(Automatic Reference Counter), so when i try to import the ASIHTTPRequest library which has 4 classes that used in their implementation the autorelease statement, here is an example:
[self setAccessLock:[[[NSRecursiveLock alloc] init] autorelease]];
The error that i got:
ARC forbids explicit message send of autorelease
What should i do to solve this problem.
I have got the solution, i needed to add the right flags to the compiler flags for each file which doesn't support the ARC. For me, i use Xcode 4.2, so under target -> Build Phases -> Compile Sources, double click on the file you want to disable the ARC feature and put -fno-objc-arc the click on Done. And it's Done ;)
Please note, that if the file doesn't exist on the list, you can just add it by clicking the + button and then perform the same work above.
Disable ARC for that one class
When you migrate a project to use ARC, the -fobjc-arc compiler flag is set as the default for all Objective-C source files. You can disable ARC for a specific class using the -fno-objc-arc compiler flag for that class.
In Xcode, in the target Build Phases tab, open the Compile Sources group to reveal the source file list. Double-click the file for which you want to set the flag, enter -fno-objc-arc in the pop-up panel, then click Done.
I want to convert my app to ARC but I have some external librarys and frameworks that are not complaint with ARC. I know when yous start a new project using ARC, you can later specify which files to ignore. But can you do this when upgrading an existing app to ARC?
in XCode, go to your active target and select the Build Phases tab. In the Compiler Flags column, set -fno-objc-arc for each of the files you don't want ARC
EDIT:
Also, to have the opposite behavior, I mean to use a file that was written using ARC inside a non ARC project, you can set the file flag to -fobjc-arc instead
There is plenty of more info regarding ARC here: http://clang.llvm.org/docs/AutomaticReferenceCounting.html#general
ARC may be explicitly enabled with the compiler flag -fobjc-arc. It may also be explicitly disabled with the compiler flag -fno-objc-arc. The last of these two flags appearing on the compile line "wins".
Source: http://clang.llvm.org/docs/AutomaticReferenceCounting.html
To add to Felipe's answer, if you want to add this to multiple files at once:
Select all the files you want to exclude form ARC
Press 'Enter'
The pop-up box will appear at the last file in the list
Type -fno-objc-arc