I have objective-c project and I added swift files in it. i created bridge file and imported swift file in some header files without problems.
But I need to import some header files to swift files by adding them in the "<project-name>-Bridging-Header.h" file.
If I put header file in that bridge file and this header file was import swift file before; Xcode give me error message: "file not found" for the swift bridge file.
i.e:
I have project name called: "ProjectBlaBla"
I have header file called "readingPage.h"
I have swift file called: "readingSwift.swift"
swift bridge file's name: "ProjectBlaBla-Swift.h"
I created header bridge file: "ProjectBlaBla-Bridging-Header.h"
I imported "ProjectBlaBla-Swift.h" in "readingPage.h" file without problem and used swift classes inside objective-c
when I import "readingPage.h" in the "ProjectBlaBla-Bridging-Header.h", I got error message in "readingPage.h" said: "ProjectBlaBla-Swift.h file not found"
any suggestions ?
thanks
You are not able to reference -Swift.h files directly or indirectly in -Bridging-Header.h files.
If you open -Swift.h, you will see a line near the top, in my case line 99: #import "/Users/.../...-Bridging-Header.h", meaning -Swift.h already imports -Bridging-Header.h, so importing back creates a circular dependency.
To avoid this, any header you import in -Bridging-Header.h must use forward references to Swift classes or protocols it uses as described in answers to this question.
In short, if readingPage.h uses a Swift class named MySwiftClass you should:
Remove any references to -Swift.h from readingPage.h.
Import -Swift.h in readingPage.m
Insert #class MySwiftClass; into readingPage.h before the class is used, letting Objective-C know that such a class exists and is declared elsewhere.
Check whether the bridging header path is correct. On the left, select your project name -> TARGETS -> Build Settings -> search for Objective-C Bridging Header. Refer the photo below.
Two options
Import the "ProjectBlaBla-Swift.h" inside the "readingPage.m" file instead of "readingPage.h" file
Create a new PCH file named "Prefix.pch" and import "ProjectBlaBla-Swift.h" inside the "Prefix.pch" file.
Note: Prefix.pch is a precompiled header which makes compiling faster. You do not need to reimport any files that are imported in prefix.ch file.
Related
I am trying to package C code into a Swift module, let's call it CModule. Once I have put it into the base folder of a project (SwiftModule) and configured the Search Paths, I could get auto-complete to work in the Swift files, as well as detect errors/warnings.
The problem is, it won't recognize the module when it's imported, and Jump to Definition results in the following error:
Couldn't Generate Swift Representation
Error (from SourceKit):
"Could not load module: CModule"
CModule contains the following files:
src folder, containing the implementation and an umbrella header exposing all required functions (by importing other sub-headers) such
that main_header.h imports componentA.h, componentB.h etc
module.modulemap, containing only:
module CModule [system] {
header "src/main_header.h"
export *
}
The CModule folder is then put at the root of the SwiftModule project.
The framework and import search paths are defined as follows: $(PROJECT_DIR)/CModule (recursive)
Considering auto-complete and others work, I am confident the import search path is set correctly. No idea about the framework search path.
Additional details:
There are no spaces anywhere in my paths.
SwiftModule is a "framework" that will eventually be put on CocoaPods.
There are no public headers but the base SwiftModule header. CModule headers are all defined as Project headers.
I have a project contains objective C code and I want to implement new features using Swift so I created Bridging header and added it to the build paths, the problem now is when I add #import "xx" to the Bridging header #import is not recognized and when I add it manually by copying and pasting like #import "MBProgressHUD.h", then i try to view the source code I get "?" although when I import the same library in any other .h or .m file it works.
Note: I know that "MBProgressHUD" works with swift, it was just for reference.
Appreciating any support and thanks in advance
I think you should do like this
1、drag the MBProgressHUD into your project
2、you can create an OC class first
, which will remind if you create yourProject-Bridging-Header.h, choose yes
3、import #import "MBProgressHUD.h" in the -Bridging-Header.h，And then compile the project
4、use it
I have an iOS project-ProjectX (not created by me) which is able to access declaration from a .h file without using #include "someHeader.h".
In ProjectX, I could just create an empty File and refer to a declaration in "someHeader.h", which I find perplexing. Example:
#import <Foundation/Foundation.h>
#implementation Empty:NSObject
SOME_TYPE_FROM_SOME_HEADER_H x;
#end
and the compiler automatically knows where the definition is?!
I have since tried to create an identical project, duplicating all the project settings, adding static libraries/files, etc. but to no avail.
Any ideas on what I might have missed out or what do I need to configure in the project to achieve this?
As mentioned by Rishab, I was missing a precompiled header (.pch) file. In the project, a pch imported a static library which contained the header file. Therefore, I was able to call the definitions directly.
I want to use my Swift files in Objective-C code. I found different link that say how to do it.
My project name is: Test-Project.
I imported #import "Test-Project-Swift.h" to my .m file to use needed classed in objective c source code.
I watched this video and there is no problem, but I have 'Test-Project-Swift.h' file not found.
As we recognized:
It looks like the problem with "-" we need to change it to "_" - "Test_Project-Swift.h". I've checked Objective-C Generated Interface Header Name in the project settings.
I've to use some .swift file into my objctiveC project.when I'm trying to add the swift files into bundle, the productodule-swift.h file not getting generated instead its generating bridging header file.I've changed my project settings DEFINES_MODULE to YES and PRODUCT_MODULE to myprojectnameModule...but no use...is there anything I'm doing wrong.please suggest me...thanks in advance
MyProductName-Bridging-header.h,MyProductName-Swift.h both are generated when importing a .swift file for the first time.
MyProductName-Swift.h file is not visible but exists in project.Never Delete MyProductName-bridging-header.h file
Settings DEFINES_MODULE should be YES and PRODUCT_MODULE should be MyProductName.
Add # import "MyProductName-Swift.h" in your objective-c class.