This question already has answers here:
Is there an alternative to initialize() in macOS now that Swift has deprecated it?
(3 answers)
Swift 3.1 deprecates initialize(). How can I achieve the same thing?
(10 answers)
Closed 4 years ago.
First of all I'm trying to execute code in my app (only from my Swift Framework!) when it is loaded into memory.
Normally I would use this ObjC Method to execute Code when my Framework is loaded into Memory.
Is there something equivalent to this in Swift?
static void __attribute__((constructor)) initialize(void){
NSLog(#"==== Code Injection in Action====");
/*
My Code
*/
}
What I have found:
Apple Developer Page regarding this (but it's also only explained in ObjC)
Other Page about Code Injection in general
Any Ideas?
Currently, Swift does not have this functionality. You can either just define an initialization function for your framework and ask your clients to call it before using any other APIs, or you can just mix in an Objective-C file into the project.
Related
This question already has answers here:
Classes vs. Modules in VB.NET
(8 answers)
VB.NET What is the purpose of a class or module?
(7 answers)
Closed 9 years ago.
I have been new to Visual Basic. Why exactly do we use a module in VB.NET?
What would be a small example of a module and calling it one of the form?
A Module in VB.Net is essentially a grouping a methods and fields. These members can be accessed without qualification anywhere that the module itself is accessible. This mechanism is actually how many of the standard VB operators ChDir, ChDrive, CurDir are implemented. There is a module in the VB runtime named FileSystem which defines all of these operations
The main advantages / differences between Module and Class are the following
It's a declarative grouping of functions that aren't associated with instances of an object
It's the only way to define extension methods in VB.Net
No need for a redundant qualifier on every usage of a project helper method
No need to protect a module from accidental instantiation by the developer. It's by definition not creatable
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Dynamically creating functions in c
Here is an example of what I'd like to do:
void attribute((constructor)) someFunction() {
// Would be nice to define C function "someFunction2" somehow here.
}
I know class_addMethod allows adding C functions to Objective-C classes during runtime.
Is it possible to add C function to C main space?
Please, don't tell me I'm wrong if I'm thinking about this way of doing things - I am interested in it rather for educational purposes.
No. A C function consists of a name and a body. The compiler transforms the body to a binary piece of executable code that will be mapped to some address when a process is created from the executable. The name is used by the static and dynamic linkers as an alias to this address.
At runtime both concepts aren't really of much interest. The executable is loaded and names are resolved, so there's little use in creating them dynamically.
On iOS it would even be impossible to create new function implementations as the kernel disallows to make memory executable.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
JavaDoc-like documentation for Objective-C in Xcode?
How to decorate Objective C methods with documentation?
I am new with objective-c. I want to add some comments for my methods so I can see these comments anywhere, anywhen I type the name of these methods and press Ctrl - Space bar. This is similar what we do with java or C#. Please give me some steps to do this.
You can use Appledoc (see this answer: Xcode: show documentation for my custom classes)
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How do I do inline assembly on the IPhone?
I am running xcode4.2.1, can I do in line assembly i.e. __asm in the code?
It's just a matter of using an inline specified and an asm() call:
inline void myFunction() {
__asm__(//asm goes here);
}
CLANG does use a similar but different form of ASM though (it's still pretty darn compatible with GAS, which can be read about here
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
What is the best way to solve an Objective-C namespace collision?
I was using 2 open source projects in an application with different use --- the issue was that both project had same class name with different implementations.
As per my understanding objective C don't have namespace option to handle scope --- as of now I am renaming the one of the class and its usage to make it work in my project.
Is there any alternative solution then renaming? I feel like objective C is missing namespace.
Renaming is the correct way. There is a reason why Apple recommends to prefix your classes with some uppercase letters. This should prevent exactly this situation. Same for method names in class extension, or "private" methods.