Conflict between location and url_launcher plugin - ios

Question

I'm developing an app which finds points of interest around the location of the user. To get the location of the user I use the location plugin which works quite nicely.
The next thing I'd like to implement is a button to open the default mapping application to navigate the user to the POI. I went at it using the url_launcher plugin and the geo: url scheme for android and the maps: scheme for iOS.
Independent of each other both plugins work as expected. Once I had both plugins in my project the problems started. Using the default setup of flutter create I get the following error:
Launching lib/main.dart on iPhone 6 in debug mode...
Running pod install...
CocoaPods' output:
↳
Preparing
Analyzing dependencies
Inspecting targets to integrate
Using `ARCHS` setting to build architectures of target `Pods-Runner`: (`arm64`)
Finding Podfile changes
- Flutter
- location
- url_launcher
Fetching external sources
-> Fetching podspec for `Flutter` from `/Users/rainerwittmann/Flutter/flutter/bin/cache/artifacts/engine/ios`
-> Fetching podspec for `location` from `/Users/rainerwittmann/.pub-cache/hosted/pub.dartlang.org/location-1.0.2/ios`
-> Fetching podspec for `url_launcher` from `/Users/rainerwittmann/.pub-cache/hosted/pub.dartlang.org/url_launcher-0.4.2+1/ios`
Resolving dependencies of `Podfile`
Comparing resolved specification to the sandbox manifest
- Flutter
- location
- url_launcher
Downloading dependencies
-> Using Flutter (1.0.0)
-> Using location (0.0.1)
-> Using url_launcher (0.0.1)
- Running pre install hooks
[!] Pods written in Swift can only be integrated as frameworks; add `use_frameworks!` to your Podfile or target to opt into using it. The Swift Pod being used is: location
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/installer.rb:448:in `block (2 levels) in verify_framework_usage'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/installer.rb:443:in `each'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/installer.rb:443:in `block in verify_framework_usage'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/installer.rb:440:in `each'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/installer.rb:440:in `verify_framework_usage'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/installer.rb:114:in `install!'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/command/install.rb:37:in `run'
/Library/Ruby/Gems/2.0.0/gems/claide-1.0.1/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/lib/cocoapods/command.rb:50:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'
Error running pod install
Error launching application on iPhone 6.
So far so good. Adding use_frameworks! to my podfile, as suggested by the error message resulted in another error:
Launching lib/main.dart on iPhone 6 in debug mode...
Running pod install...
Running Xcode build...
Failed to build iOS app
Error output from Xcode build:
↳
** CLEAN FAILED **
The following build commands failed:
Check dependencies
(1 failure)
** BUILD FAILED **
The following build commands failed:
Check dependencies
(1 failure)
Xcode's output:
↳
Build settings from command line:
ARCHS = x86_64
BUILD_DIR = /Users/rainerwittmann/Flutter/zapfsuche/build/ios
ONLY_ACTIVE_ARCH = YES
SDKROOT = iphonesimulator10.3
=== CLEAN TARGET location OF PROJECT Pods WITH CONFIGURATION Release ===
Check dependencies
“Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.
=== CLEAN TARGET url_launcher OF PROJECT Pods WITH CONFIGURATION Release ===
Check dependencies
=== BUILD TARGET url_launcher OF PROJECT Pods WITH CONFIGURATION Release ===
Check dependencies
=== BUILD TARGET location OF PROJECT Pods WITH CONFIGURATION Release ===
Check dependencies
“Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.
Could not build the application for the simulator.
Error launching application on iPhone 6.
Unfortunately I have no idea how to proceed from here. Can somebody help me sort this out?
Note
This problem only exists on iOS. Both plugins work like a charm on android.

Answer 1

Swift plugins require use_frameworks! and that isn't fully supported yet.
I'm currently working on it. Thanks for your patience!

Answer 2

Edit Podfile
Add/uncomment after "target 'Runner' do" line number ~35
use_frameworks!
Then add this line after line number ~67
config.build_settings['SWIFT_VERSION'] = '4.0'
Example:
target 'Runner' do
** use_frameworks! **
........ ......
post_install do |installer|
installer.pods_project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings['ENABLE_BITCODE'] = 'NO'
** config.build_settings['SWIFT_VERSION'] = '4.0' **
end
end
end
delete your Podfile.lock and try.