Failed to emit precompiled header for bridging header

Question

I downloaded a project from GitHub, then pod the following files, some of which are written by OBJ-C and I used a bridge header.

pod ‘SnapKit’
pod ‘MJRefresh         


        

Answer 1

My experience with this is that Xcode is unable to find header files for pods/frameworks imported in the project.

My Project experience with this: Updating Xcode9.2 - 9.3 where many cocoapods had to be updated due to implicit definitions now unavailable or being outdated.
I had changed the Podfile to now include 'use_frameworks!'. Following this and after dealing with other compile issues I found the error you are experiencing. I believe adding 'use_frameworks! was preventing some pods with support prior to iOS 8 from compiling correctly. Steps I took to correct this issue:

1. I tried deleting the Pods/ directory using cocoa pod deintegrate
2. I then open project with Xcode and cleaned the build folder and the project. (delete content within derived data folder)

3. I then pod install again but the issue persisted.

4. Ultimately I removed the use_frameworks line in Podfile and then repeated steps 1-3 and the project was now able to find the missing header files and the issue never presented it self again.

Answer 2

I also suffered from this after I updated new Xcode. After several hours of investigation, i found that if you have multiple targets, you now have to add more targets in pod file in Xcode 10. So your code should be like this:

platform :ios, '9.0'

target 'EvoRadio' do

pod ‘SnapKit’
pod ‘MJRefresh’
pod ‘Alamofire’
pod ‘Kingfisher’
pod ‘MBProgressHUD’
pod ‘pop’
pod ‘EVReflection’
pod ‘StreamingKit’
pod ‘iCarousel’
pod ‘ReflectionView’

target 'EvoRadio2ndtarget'   # add your second target

end

I found that in Xcode 9 you don't need to add, but in Xcode 10 you need to add this. Hope this helps.

Answer 3

I got this error after renaming the existing Xcode project configuration in which I had another Xcode project imported.

To fix it, you have to rename the same configuration in the imported project as well.

Answer 4

In my case I had the same compiler error with additional errors like "Unknown type" in one of my project files, So I just added this to the problematic file, and it solved it instantly.

#import <UIKit/UIKit.h>

Answer 5

You can try this solution. I have solved the same problem by this way.

Product > Scheme > Edit Scheme > Select "Build" on Left Menu > Find implicit dependencies

Under the build tab, check 'Find implicit dependencies':

Then make a clean and build again.

Answer 6

For Xcode 11 I had an issue with the "Security.framework". I removed this dependency, then re added it. Ultimately fixed the other problems