After installing Xcode 8 beta 6, I'm getting a warning saying:
Instance method 'application(_:didFinishLaunchingWithOptions:)' nearly matches optional requirement 'application(_:didFinishLaunchingWithOptions:)' of protocol 'UIApplicationDelegate'
in my App Delegate.
There are 2 suggested fixits to silence the warning:
Mark the method as private
Add #nonobjc to the method
Doing either silences the warning. But why does this need to be done?
iOS 12 SDK Update
In the iOS 12 SDK (that ships with Xcode 10), UIApplicationLaunchOptionsKey has now been renamed to the nested type UIApplication.LaunchOptionsKey, so you'll want:
func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
// ...
}
iOS 10 and 11 SDKs (Xcode 8 and 9)
This warning is due to the fact that the didFinishLaunchingWithOptions: parameter of the application(_:didFinishLaunchingWithOptions:) delegate method is now bridged to Swift as a [UIApplicationLaunchOptionsKey: Any]?, rather than an [NSObject : AnyObject]?.
Therefore you'll need to update your implementation to reflect this change:
func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
) -> Bool {
// ...
}
Note that neither of Xcode's suggested fixes will actually fix the problem, they'll only conceal your implementation of application(_:didFinishLaunchingWithOptions:) from Objective-C – meaning that it'll never actually get called.
the first parameter passed into the function no longer has an external name. This is really just a minor detail since you don’t call this method directly, and it’s a quick fix to make the compiler happy. You can either manually edit that first parameter name to _, or just let Xcode handle this for you.
func application(_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool
or the New Syntax
func application(_ application:UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool // or remove = nil and try
you can get the latest Documentation from apple and sample link in here
Related
I want to use Braze to send in-app message notification and show customized UI to replace the UI created by Braze. But beforeInAppMessageDisplayed is never called. Below is how I done.
I added
Appboy.start(withApiKey: apiKey, in: application, withLaunchOptions: launchOptions, withAppboyOptions: [ ABKInAppMessageControllerDelegateKey: self ]) in func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
and also added
func beforeInAppMessageDisplayed(inAppMessage: ABKInAppMessage!) -> ABKInAppMessageDisplayChoice
in AppDelegate class.
I resolved this issue by putting func beforeInAppMessageDisplayed(inAppMessage: ABKInAppMessage!) -> ABKInAppMessageDisplayChoice in ABKInAppMessageControllerDelegate.
UIApplicationDelegate method - application(_:didFinishLaunchingWithOptions:) showing an error with Swift 4.2 (Xcode 10).
UIApplicationLaunchOptionsKey not found
What is replacement of UIApplicationLaunchOptionsKey in Swift 4.2?
'UIApplicationLaunchOptionsKey' has been renamed to 'UIApplication.LaunchOptionsKey'. Replace 'UIApplicationLaunchOptionsKey' with 'UIApplication.LaunchOptionsKey'.
Click on error hint, will show you solution:
func application(_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
}
Xcode would fix-it but UIApplicationLaunchOptionsKey is replaced by a nested type UIApplication.LaunchOptionsKey.
It should be UIApplication.LaunchOptionsKey, Please find following apple documentation
I have tried the below snippet of the code and worked for me.
func application(_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication: Any]? = nil) -> Bool {
}
Just provide UIApplication in launchOptions.
Hopes it will work for you as well. :)
Isn't didFinishLaunchingWithOptions supposed to be called when the app starts running for the first time? I set a breakpoint at this method and when I run the app in the simulator the breakpoint doesn't get hit, which means the method doesn't get called. I'm trying to load some data from UserDefaults whenever the app launches, but it's being completely ignored. One thing I noticed is that it's by default a private func instead of a func. If I get rid of the private, I receive a warning that "there's an almost similar optional requirement in the UIApplicationDelegate". Can someone explain to me what this means and whether or not the private func has anything to do with the method being ignored? Is that method even supposed to be called when I run my app in the simulator? If not, how can I test if data is being retrieved after my app launches? All the other methods in the AppDelegate do get called normally (for example, the applicationDidEnterBackground method works perfectly fine).
Remove your method signature and have Xcode autocomplete it
I also had the problem that my didFinishLaunchingWithOptions method in AppDelegate would not be called. My function was also marked private and looked like this
private func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
The problem is that this is the old syntax! Apparently for me when I converted my project from Swift 2.x to Swift 3 Xcode did not convert the methods in AppDelegate. The new syntax looks like this
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool
Swift 4.2:
func application( _ application: UIApplication,didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
for Swift ~3.0 Replace didFinishLaunchingWithOptions with
follwing signature
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
}
Have you implemented the didFinishLaunchingWithOptions in one of your ViewControllers? One will not get a call to the custom implementation of this method. This method is defined in the ApplicationDelegate and it will always be called once the app is launched. If you haven't defined the method again in any ViewController and the one in AppDelegate is not being called, then try resetting the simulator. From the simulator menu Simulator -> Reset content and settings.
If compiler prompts to make the didFinishLaunchingWithOptions method private then the parameter of the method might be causing the error.
The parameter of the application(_:didFinishLaunchingWithOptions:) delegate method is now bridged to Swift as a [UIApplicationLaunchOptionsKey: Any]?, rather than an [NSObject : AnyObject]?. So modify the method signature as shown.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// ...
}
This method is defined in the ApplicationDelegate and it will always be called once the app is launched. If you have not defined the method again in any ViewController and the one in AppDelegate is not being called, then try resetting the simulator.
Open simulator - > menu Simulator -> Reset content and settings.
-(BOOL)application(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//..
}
Update for Swift 4.2:
func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool
Delete app from device and restart Xcode worked for me here
After the Xcode update, the compiler began to throw an error on the working code (both functions are in the AppDelegate.swift).
func application(application: UIApplication,
didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool
{
FBLoginView.self
FBProfilePictureView.self
return true
}
With error:
/Users/../AppDelegate.swift:14:11: Objective-C method 'application:didFinishLaunchingWithOptions:' provided by method 'application(:didFinishLaunchingWithOptions:)' conflicts with optional requirement method 'application(:didFinishLaunchingWithOptions:)' in protocol 'UIApplicationDelegate'
And second
func application(application: UIApplication,
openURL url: NSURL,
sourceApplication: NSString?,
annotation: AnyObject) -> Bool {
var wasHandled:Bool = FBAppCall.handleOpenURL(url, sourceApplication: sourceApplication as! String)
return wasHandled
}
with error
/Users/../AppDelegate.swift:25:11: Objective-C method
'application:openURL:sourceApplication:annotation:' provided by method 'application(:openURL:sourceApplication:annotation:)' conflicts with optional requirement method 'application(:openURL:sourceApplication:annotation:)' in protocol 'UIApplicationDelegate'
I understand that most likely I should like you to stick together somehow these two functions into one. I do not understand why this code suddenly stopped working in 6.3, despite the fact that it worked in 6.2.
I'm not sure exactly why the compiler is throwing the error, however I do see a difference in the default Swift version of those same methods. Perhaps you could replace the function declaration with those created with a normal Swift project:
1
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
2
func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool
I'd recommend replacing your method declarations with the above to see if it compiles now.
EDIT 1 (9/21/2015): I've confirmed these are now up to date for Xcode 7's public release. They removed the optional (annotation: AnyObject?) and made it (annotation: AnyObject), in declaration #2.
The type of the launchOptions parameter of the didFinishLaunchingWithOptions function was changed in XCode 6.3:
"launchOptions: NSDictionary?" has become "launchOptions: [NSObject: AnyObject]?"
Just change your function header to match the following:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
You should also make sure you are using the correct type. Use String instead of NSString.
Try overriding that method again from Xcode completions. Worked for me.
launchOptions have been changed; try changing out "launchOptions: NSDictionary?" to "launchOptions: [NSObject: AnyObject]?"
Hope this helps!
I am finding this error in my AppDelegate.swift file and it appears in the AppDidFinishLaunchingWithOptions function. It is raising the error on a line of code that is from the Parse framework.
PFAnalytics.trackAppOpenedWithLaunchOptions(launchOptions)
The error is appearing on the launchOptions parameter. I will post the whole function to show that it should be correct. Also when I comment out the line of code the error disappears, but I still really want to be able to use the function and track the analytics. Here is the whole function:
func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: AnyObject!) -> Bool
{
// Override point for customization after app launches
Parse.setApplicationId("removed on purpose", clientKey: "removed on purpose")
PFAnalytics.trackAppOpenedWithLaunchOptions(launchOptions)
PFFacebookUtils.initializeFacebook()
return true
}
I can't seem to find anything that relates to this error. If anyone has some insight I would really appreciate it!
Since Xcode 6 beta 7, when you want to call application:didFinishLaunchingWithOptions:, you have to replace:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
/* ... */
}
with the following code:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
/* ... */
}
The last parameter of this method is no more a NSDictionary but a Dictionary of type [NSObject: AnyObject]?. Therefore, you must update your code (including your trackAppOpenedWithLaunchOptions: parameter type).
The launchOptions parameter should be declared as NSDictionary! instead of AnyObject!:
func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
// ...
}