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build failed with: ld: duplicate symbol _OBJC_CLASS_$_Algebra5FirstViewController
(28 answers)
Closed 7 years ago.
I'm trying to add all the frameworks that I need to use the Firebase, but I have a trouble with one framework exactly the FirebaseSimpleLogin.framework, the compiler says that can't found it but it's added. it's my first round with using external frameworks and this is new for me and I can't figured out what is wrong with this.
As Jay mentioned in his comment, you're using an old version of the Firebase SDK.
See this quick video for setting up your project with the latest version of Firebase using CocoaPods.
Related
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Swift compatibility between versions for a library
(2 answers)
Closed 6 years ago.
We are developing an iOS framework using Swift 2.2. This framework is intended for outside use, i.e., its built binary will be distributed to our clients, and they will use it to develop their applications.
Another update: Swift 3 will not have ABI compatibility. See here: https://www.infoq.com/news/2016/05/swift-3-no-stable-abi.
So if we author the framework in Swift, and the only way to guarantee our clients using different versions of Swift can consume it safely is to build multiple versions of the framework, and ask them to download the version that matches theirs, right?
From Apple's documentation.
Swift 2.3 and Swift 3 are not binary compatible so your app's entire
code base needs to pick one version of Swift.
Also here is a similar question that you may find helpful.
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Where is the source code for NSObject.m? [closed]
(3 answers)
Closed 6 years ago.
I am learning about Objective-C runtime. I can access to NSObject.m root class to see how it works but I can not acces to NSProxy.m or UITableView.m files.
Why does Apple enable access to some implementation files and others not?
I've searched in Google but I haven't found anything.
Actually, you don't have access to any of Apple's Cocoa source code. It's secret.
You may have found online some open source version of NSObject (for the Darwin project or OpenStep / GNUStep or similar), but that is not Apple's Cocoa source code.
Apple may choose to provide an open source version of some of their code, e.g. http://www.opensource.apple.com/. But even then you don't really know what they are using under the hood.
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swift : Failed to communicate with Interface Builder
(3 answers)
Closed 7 years ago.
I've searched on google for some time and can't find the answer to this problem of mine.
When I try to open the main.storyboard of any swift project, my xcode crashes, I can access the source code and all, just not the interface builder.
I get the error which can be seen in the pastebin link:
http://pastebin.com/URgBuPkV
Well, this looks like a bug in your Xcode.
I would recommend to simply de-install and then re-install Xcode.
Hope that helps :)
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How to build a framework or library for other developers, the secure way? [closed]
(3 answers)
Closed 8 years ago.
I have a developed a generic class and I want to give it to one of my friend.
How can I hide the code so that he should not view the logic in that. Can I do something like apple does by giving us only the .h files.
Please help me in achieving this. Thanks.
you need to create your own static library i.e. .a file in xcode. And it is not very tough, you can do this in just in few mins.
Read this tutorial and try in out:
How to make Universal Static library (.a file) in iOs using xCode
You will have to make your own library (framework) for this.
You can search about it there are many tutorials about that. One of them is How to build a framework or library for other developers, the secure way?
Edit: Great Tutorial
Creating Static Libraries For iOS
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How to automatically convert Manual Retain-Release code to ARC?
(2 answers)
Closed 9 years ago.
I started an old project in an xcode that did not support ARC, how can I change my project into using ARC and how do I know what to remove from the project?
In Xcode, Edit => Refactor => Convert to Objective-C ARC... and follow the instructions.