Failed to emit precompiled header because Loop condition

Question

Let said I have Swift and Objc classes, and a MyProject-Bridging.h

BazSwiftClass.swift

public class BazSwiftClass: NSObject {
    public let foo: String
    @objc init(foo: String) {
        self.foo = foo
    }
}

FooClass.h

#import "MyProject-Swift.h"
@interface FooClass : NSObject {
     - (BazSwiftClass)bazMethod;
}

I want to access the FooClass.h in another Swift Class (let said BarSwiftClass)

public class BarSwiftClass {
     public hello() -> BazSwiftClass {
          return FooClass().bazMethod()
     } 
}

I need FooClass.h in my swift file, so I added FooClass in my MyProject-Bridging.h

#import "FooClass.h"

So the Flow is like BarSwiftClass -> FooClass -> BazSwiftClass

It can't work because the compiler show "failed to emit precompiled header" and I think it is because of #import "FooClass.h" in MyProejct-Bridging.h

Please help.

Thank you.

you need to import only .h files in bridging header and not .m files so remove reference to .m file clean and rebuild — Sandeep Bhandari
– Sandeep Bhandari, Commented Jun 12, 2018 at 8:09
I have import only in .h file, but it still causing the error. I edit my question to avoid confusion. — Jefferson Setiawan
– Jefferson Setiawan, Commented Jun 12, 2018 at 8:12
Did you check this link @JeffersonSetiawan stackoverflow.com/questions/46293028/… — Quoc Nguyen
– Quoc Nguyen, Commented Jun 12, 2018 at 8:13
Yes, I know the problem from that link (I use bridging and in the MyProject-bridging, I import that objc file too), but I want to know can I keep using this method? — Jefferson Setiawan
– Jefferson Setiawan, Commented Jun 12, 2018 at 8:21

Prashant Tukadiya · Accepted Answer · 2018-06-12 08:28:00Z

4

Replace your code

#import "MyProject-Swift.h"
@interface FooClass : NSObject {
     - (BazSwiftClass)bazMethod;
}

With

@class BazSwiftClass
@interface FooClass : NSObject {
     - (BazSwiftClass)bazMethod;
}

and in FooClass.m File you can import #import "MyProject-Swift.h"

answered Jun 12, 2018 at 8:28

Prashant Tukadiya

16.5k4 gold badges67 silver badges106 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Jefferson Setiawan Over a year ago

Thank you @PrashantTukadiya !! After use (@)class BazSwiftClass I can make it compiled.

Alper Over a year ago

In general import as few things as possible in your .h files and try to use only forward class and protocol references.

Alper Over a year ago

In general import as few things as possible in your .h files and try to use only forward class and protocol references.

Collectives™ on Stack Overflow

Failed to emit precompiled header because Loop condition

1 Answer 1

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related