I am interested to learn more about the implementation details of class DispatchQueue : DispatchObject.
I have looked here, and here but I can't find the matching implementation.
You probably won't find this in the Swift code because it isn't Swift. This is just a front end for Cocoa's OS_dispatch_queue etc., which are not open source. It's not part of the Swift library; it's an iOS thing, not a language thing.
Related
I am building a rather large library and I think it would be a lot cleaner if I could have the implementation for my methods and such hidden. For example, when you view the in-code documentation for standard Swift types, such as UInt64, you see things like:
With the actual implementation of the methods hidden, and only the declarations and headers shown. How can I do this with my own library?
You need to distribute your library as a precompiled binary, in which case only the public headers + documentation will be visible for consumers of your library.
For more information, you can watch the WWDC2019 video of about Binary frameworks in Swift.
There is a shortcut in Xcode to show only the interface: Control+Command+Up Arrow, but it is a little slow and doesn't hide the internal methods that not useful for the usage of the code (since only public and open interface in Swift Package can be used by outside module).
I am learning Swift by myself on MacOS. When following the tutorial and practicing the array function: <array_name>.sort(), I can get it executed but I always wonder how it works and what is the actual algorithm inside it.
So is there any way to check the certain function definitions?
If you want to check the declaration of the function/class, you can command-click on it. If you want the documentation, you can either option-click it or check it on the API reference page. If you want to see the implementation details of the Swift standard library, check the source code here at GitHub. If the implementation you are checking is in a non open-source APIs though, you can't quite check it.
I'm new to Swift and is trying to understand how to use Swift Standard Library Reference. I have past experience in Java and if I want to find a class or a class's method, I simply type e.g. String.charAt() Java SE8 in Google and the first result shown is the latest offical Oracle documentation on String class. However, if I want to find a class or method in Swift, when I type in e.g. pow() Swift Standard Library Reference, google only shows the main page to Swift Standard Library Reference, not the page of the class that actually contain the method. Could someone please tell me how to actually search the Swift Library? It would help me a great deal! Thanks in advance for any help!
if you are using Xcode just go to Help > Documentation and API Reference
I was just wondering if there is any written documentation on realm swift for iOS 7, since it is combination of objective c and swift.
Just to be clear, I'm not looking for official documentation, just some guidelines so I have a clearer view of what to use.
Thank you for any help.
You should refer to Realm Objective-C's documentation guide (https://realm.io/docs/objc/latest) and API documentation (https://realm.io/docs/objc/latest/api), which is applicable even when used from Swift.
As our installation instructions recommend (https://realm.io/docs/objc/latest/#installation), you should also be using RLMSupport.swift which adds some useful helpers to use Realm Objective-C from Swift. That file's source is its best documentation, it's pretty small and should be fairly readable.
Finally, to determine the exact Swift syntax when calling Objective-C methods, I recommend you either use autocomplete, or command-click a Realm.framework token from Swift, which should display Xcode's auto-generated Swift interface for the Realm module.
I was wondering if you can write inline assembly in Swift.
I know that in Objective-C you could use something like this:
inline void assemblyFunc() {
__asm__(/*Assembly*/);
}
But in Swift it seems that you can't use __asm__(/*Assembly*/).
Does anyone know how to use __asm__() if its even possible.
I haven't found anything about it, so I thought it would be a good question to ask.
There isn't a way in Swift itself. If you need this, probably a good opportunity to take advantage of Swift-ObjC interop.
To expand on what Robert Levy said, you can just use the Swift/Obj-C interop feature, and write an Obj-C class that does the ASM stuff, which you can then call from Swift.
It's an annoying workaround, but it should work nonetheless.
You can read more about how to do it [here]