Here is the reference I created to my Firebase database
let ref = FIRDatabase.database().reference()
However, when I try to use this as the base_url for a push(), I get this error:
Value of type 'FIRDatabaseReference' has no member 'push'
I tried to change my base_url to this:
let ref = Firebase.database().ref()
But then I get
Module 'Firebase' has no member 'database'
Here's my Podfile. Am I missing something? I have imported Firebase at the top of my file.
# Uncomment this line to define a global platform for your project
# platform :ios, '9.0'
target 'ValleybrookMessenger' do
# Comment this line if you're not using Swift and don't want to use dynamic frameworks
use_frameworks!
# Pods for ValleybrookMessenger
pod 'Firebase'
pod 'Firebase/Database'
pod 'Firebase/Auth'
target 'ValleybrookMessengerTests' do
inherit! :search_paths
# Pods for testing
end
target 'ValleybrookMessengerUITests' do
inherit! :search_paths
# Pods for testing
end
end
Swift doesn't have a push() method, so the equivalent you probably want is childByAutoId().
The first way you created the reference is correct:
let ref = FIRDatabase.database().reference()
Swift doesn't provide push method as javascript does, but you can perform similar action by following code
let ref = Database.database().reference("Items")
var key = ref.childByAutoId().key as? String ?? ""
ref.child(key).setValue(["Item_Name" : name])
In javascript push method automatically generates a unique key but in swift you can generate by
var key = ref.childByAutoId().key as? String ?? ""
which you can add to reference as a child and setValue inside that key.
Related
We have created a CocoaPod which is an XCFramework that has dependencies on other CocoaPods. When we run the demo example app or install the pod in a new app, it works, however this is logged to the console on launch (repeated for many classes):
objc[38875]: Class OTSubscriber is implemented in both
/Users/MyUser/Library/Developer/CoreSimulator/Devices/8DD81910-DD40-4BD7-9355-8A0C78EFD32E/data/Containers/Bundle/Application/60E8C18A-37DC-4C2B-AEB3-E88C3A7C4D96/MyCocoaPod_Example.app/Frameworks/MyFramework.framework/MyFramework
(0x10e3fd660) and
/Users/MyUser/Library/Developer/CoreSimulator/Devices/8DD81910-DD40-4BD7-9355-8A0C78EFD32E/data/Containers/Bundle/Application/60E8C18A-37DC-4C2B-AEB3-E88C3A7C4D96/MyCocoaPod_Example.app/MyCocoaPod_Example
(0x10c8abd80). One of the two will be used. Which one is undefined.
This class is from OpenTok, which is a dependency specified for the pod used in the framework. The message seems to reveal CocoaPods is installing the dependencies on the app in addition to the framework, causing this issue. The app itself shouldn't have any dependencies except this framework.
Perhaps something was done incorrectly in the pod creation process? These are the steps we took:
Create an Xcode framework project, add a Podfile listing its dependencies, build out the framework's functionality
Create an XCFramework from the framework's xcworkspace
Create the pod using pod lib create MyCocoaPod choosing iOS, Swift, include demo, none and no for testing
Update the Podspec:
Pod::Spec.new do |s|
s.name = 'MyCocoaPod'
s.version = '1.0.0'
s.summary = 'Summary'
s.description = <<-DESC
'Description'
DESC
s.homepage = 'https://myhomepage.com'
s.license = { :type => 'MIT', :file => 'LICENSE' }
s.author = { 'Author' => 'auther#somedomain.com' }
s.ios.deployment_target = '12.0'
s.source = { :git => 'https://github.com/user/git-repo.git', :tag => s.version.to_s }
s.vendored_frameworks = 'MyFramework.xcframework'
s.swift_version = '5.5.2'
s.dependency 'OpenTok', '2.21.3'
# Needed to pass lint validation
s.pod_target_xcconfig = { 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'arm64' }
s.user_target_xcconfig = { 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'arm64' }
end
Drag and drop MyFramework.xcframework into Pods/Development Pods/MyCocoPod
Update the example's Podfile to specify BUILD_LIBRARY_FOR_DISTRIBUTION = YES:
post_install do |installer|
installer.pods_project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings['BUILD_LIBRARY_FOR_DISTRIBUTION'] = 'YES'
end
end
end
Run pod install in Example directory - note this will cause the framework to be moved to the root level in Finder and under a Frameworks group in Xcode
Update the example app's code to import and use MyFramework
Commit, tag, and push the changes to the repo
Push the Podspec to the specs repo
Not sure if this is your case but maybe you are falling in a scenario which happened to me,
meaning a dynamic framework that depends on a static framework. In such scenario, your dynamic framework would end up embedding the static one in his resulting binary. Then, in order to import your dynamic framework in the project, you will import with the setting “Embed and sign” for example, as that’s indeed a dynamic one, along with the other static framework which your dynamic one depends on. This causes the duplicated implementation ( your app including the static dependency + the dynamic one embedding inside the same dependency.
What you could do if this is your case, is to make sure that the dynamic framework configuration is changed to be static (static xcframework to be precise) , maybe outside cocoa pod as first step if that simplifies. Code wise would be the same, but it will “link” to the dependency (OpenTok for example) rather than embedding it. As result, once imported in the app, it should be imported only once, as your custom framework links to it and does not embeds it, finally avoiding the duplicated implementation. (static frameworks are imported with “Do not embed” which means that they will be merged in compile time to the app executable)
I'm creating an iMessage app that needs to connect to the same database as my regular app.
I call FirebaseApp.configure() and I authenticate the user but for some reason after all of that Database.database().reference() is null even though it is supposed to be a non null value.
var ref: DatabaseReference!
override func viewDidLoad() {
super.viewDidLoad()
if FirebaseApp.app() == nil {
FirebaseApp.configure()
Database.database().isPersistenceEnabled = true
print("FIREAPP Configed")
print(FirebaseApp.app())
signIn() //Use kept google credentials to log in
configureDatabase()
}
}
func configureDatabase() {
ref = Database.database().reference()
print(ref)
}
I'm expecting Database.database().reference() to be the root reference of the database instead of nil. Thanks for any help in advance!
I was also struggling with similar errors.
In my situation, my understanding of CocoaPods was not enough.
Before:
target 'MyApp' do
use_frameworks!
pod 'Firebase/Database'
target 'MyAppTests' do
inherit! :search_paths
end
target 'MyFrameWorkA' do
inherit! :search_paths
end
target 'MyFrameWorkB' do
inherit! :search_paths
end
end
After:
abstract_target 'AnyTargets' do # Anything that doesn't duplicate the actual target name
use_frameworks!
pod 'Firebase/Database'
target 'MyApp' do
end
target 'MyAppTests' do
end
target 'MyFrameWorkA' do
end
target 'MyFrameWorkB' do
end
end
I was able to consult your questions when looking for a solution.
I hope you solve the problem.
It seems you're confused about this line:
ref = Database.database().reference()
This merely sets up a reference to the root of the database. It doesn't load any data yet.
To actually load the data, attach a listener to the reference:
ref.observeSingleEvent(of: .value, with: { (snapshot) in
print(snapshot.value)
}) { (error) in
print(error.localizedDescription)
}
Note that data is loaded from Firebase asynchronously. Any code that needs the data, must be inside the completion handler (as above) or be called from there.
Also see the Firebase documentation on reading and writing data.
I stumbled over this error as well and the solution for me was adding 'Firebase/Core' to my pod file. I am not sure if this is common knowledge, but on setting up my firebase database project I never read about adding this specific pod.
My pod file after rewriting it:
target 'MyApp' do
# Comment the next line if you're not using Swift and don't want to use dynamic frameworks
use_frameworks!
# Pods for MyApp
# add pods for desired Firebase products
# https://firebase.google.com/docs/ios/setup#available-pods
pod 'Firebase/Database'
pod 'Firebase/Core'
end
# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'
target 'ytl' do
# Uncomment the next line if you're using Swift or would like to use dynamic frameworks
# use_frameworks!
# Pods for ytl
pod 'Google-Mobile-Ads-SDK', '~> 7.20’
pod "AXWireButton"
pod "DGActivityIndicatorView"
pod use_frameworks! “RaisePlaceholder”
end
I created the Swift RaisePlaceholder, now I want to import in Objective-C class UIView Class.
How can I import Swift pod class into objective-C UIView Class?
Your input will be appricated.
Just simply add #objc before your Swift class like below
#objc class YourSwiftClass: UIViewController
Now in your project & targt settings, change below flags to YES
Defines Module : YES
Always Embed Swift Standard Libraries : YES
Install Objective-C Compatibility Header : YES
Now clean your project COMMAND+K now import in your objective C file like regular import
#import "YourTargetName-Swift.h"
Note: If your target name contains spaces, replace them with underscores (example: "Sample Project" becomes "Sample_Project-Swift.h"). Another point to note, in fact, that is not your project name instead your target name
Link to Apple Docs: How to use Swift code in Objective C
Hoping somebody has already solved this; I'm trying to wrap a third-party library (Airwatch) in a cocoapod for better management across our apps. I'm having a hell of a time trying to get this to work, though. I've created a pod around a static library, but this one is a dynamic framework, and I'm having a hell of a time getting it to compile. The headers from the framework just aren't accessible in the containing app....
Here's what I have tried already:
When I set vendored_libraries in podspec i can't seem to access headers with either quotes or <>. Xcode just complains as 'Not Found'
Next, I tried adding the path of the headers in the framework as source_files like so
s.source_files = 'Pod/Classes/**/*','Pod/Framework/AWSDK.framework/Versions/A/Headers/*.h'
This allows xcode to find the header for an import like:
import "AWSDKCore.h" //Documented as the framework's main header
But this throws an error for the existing imports within the original framework:
I figured this was a bad idea, but I thought I'd try naming my cocoapod the same name as the Framework (which should keep the import path). So, this throws a bunch of errors saying some enums either aren't declared or are declared twice.
If anybody has thoughts, I'd be eternally greatful...
Just for reference here's my podspec:
Pod::Spec.new do |s|
s.name = "AirwatchSDK"
s.version = "0.1.0"
s.summary = "A short description of AirwatchSDK."
s.homepage = "https://github.com/<GITHUB_USERNAME>/AirwatchSDK"
s.license = 'MIT'
s.author = { "xxxxx" => "xxxx" }
s.source = { :git => "https://github.com/<GITHUB_USERNAME>/AirwatchSDK.git", :tag => s.version.to_s }
s.platform = :ios, '8.0'
s.requires_arc = true
#s.module_name = 'AWSDK'
s.source_files = 'Pod/Classes/**/*','Pod/Framework/AWSDK.framework/Versions/A/Headers/*.h'
s.vendored_frameworks = 'Pod/Framework/AWSDK.framework'
s.frameworks = 'CFNetwork','CoreData','CoreFoundation','CoreGraphics','CoreLocation','CoreTelephony','CoreText'
s.libraries = 'stdc++','z','sqlite3','c++'
end
Since I figured out my own answer, I thought I'd post it here for the next guy...
The key, it turns out, was to not have 'source_files' (or to comment it out). I'm not sure if that is a bug or not, but my final podspec had vendored_framework set and source_files not set like so:
#can't have source files if you want to access vendor framework
#s.source_files = 'Pod/Classes/**/*'
# airwatch framework.
s.vendored_frameworks = 'AWSDK.framework'
I am trying to modulize my app by splitting it in different sub projects.
Inspired by this idea. So I splited my project to static libraries followed by that tutorial. I created a first library with some costume UIHelpers/Views. It has some dependencies which I defined in PodSpec file followed by AFNetworking example. (one of the dependencies is Choosy). I stored this library in bitBucket. Everything is working fine for that library(I can build it in Xcode). The problem start when I create a Model Library. I specify Git path of UIHelpers in the Model PodFile. Every time I get an error of No visible #interface for a category in Choosy (the error come from CocoaPod NOT in my project, the category is imported in the .mfile). I tried to play with link flags -ObjC,$(inhereted),-force_load included all of them.Objective-C categories in static library I cleaned the derived data.
I read the CocoaPodTroubleShoutes.
Can somebody suggest what can be tried. There is a lot of question in stuck regarding that compile error but none of them helped me.
I believe the problem somewhere in my PodSpec(cant be sure) pod lib linit I receive :- ERROR | [iOS] Choosy/Choosy/Model/ChoosyAppInfo.m:32:19: error: no visible #interface for 'UIImage' declares the selector 'applyMaskImage:completion:'
My PodSec:
Pod::Spec.new do |s|
#I tried this options:
#s.xcconfig = { 'OTHER_LDFLAGS' => $(inherited) }
#s.compiler_flags = '-ObjC'
#'-all_load'
#$(inherited)
#'-DOS_OBJECT_USE_OBJC=0', '-Wno-format'
#'-force_load'
s.prefix_header_contents = '#import <UIKit/UIKit.h>', '#import <Foundation/Foundation.h>','#import <CoreGraphics/CoreGraphics.h>','#import "ARNStyles.h"'
s.description = <<-DESC
A longer description of ARNUIHelpers in Markdown format.
DESC
s.homepage = "http://EXAMPLE/ARNUIHelpers"
s.platform = :ios, "7.0"
s.ios.deployment_target = "7.0"
s.source_files = 'UIHelpers/**/*.{h,m}'
s.requires_arc = true
s.subspec 'Choosy' do |ss|
ss.requires_arc = true
ss.compiler_flags = '-force_load'
ss.platform = :ios, "7.0"
ss.dependency 'Choosy'
# ss.xcconfig = { "FRAMEWORK_SEARCH_PATHS" => "$(PODS_ROOT)/Headers/Public/Choosy"}
# ss.ios.public_header_files = 'UIImage+ImageEffects.h'
end
s.subspec 'Dependencies' do |ss|
#ss.ios.public_header_files = 'UIImage+ImageEffects.h'
ss.requires_arc = true
ss.dependency 'FormatterKit'
end
end
In the end it was my fault. The previous developer copied those files from Choosy pod and included it manually.We still use Choosy in other places. Unfortunately the error wasn't clear enough to deduce what was wrong.