What Is Method Swizzling In Swift?

Do not disable method Swizzling?

Method swizzling in Firebase Cloud Messaging Developers who prefer not to use swizzling can disable it by adding the flag FirebaseAppDelegateProxyEnabled in the app’s Info.

plist file and setting it to NO (boolean value)..

What is Dispatch in Swift?

Method Dispatch is how a program selects which instructions to execute when invoking a method. It’s something that happens every time a method is called, and not something that you tend to think a lot about.

What does @objc mean in Swift?

Objective-C dynamic dispatch@objc means you want your Swift code (class, method, property, etc.) to be visible from Objective-C. dynamic means you want to use Objective-C dynamic dispatch.

How do I find my APN authentication key?

Create the authentication keyIn your developer account, go to Certificates, Identifiers & Profiles, and under Keys, select All.Click the Add button (+) in the upper-right corner.Enter a description for the APNs Auth Key.Under Key Services, select the APNs checkbox, and click Continue.Click Confirm and then Download.Nov 10, 2020

What happens when you invoke a method on a nil pointer?

In Objective-C, it is valid to send a message to nil — it simply has no effect at runtime. … If the method returns any pointer type, any integer scalar of size less than or equal to sizeof(void*) , a float , a double , a long double , or a long long , then a message sent to nil returns 0 .

What is Fcmtoken?

An FCM Token, or much commonly known as a registrationToken like in google-cloud-messaging. As described in the GCM FCM docs: An ID issued by the GCM connection servers to the client app that allows it to receive messages. Note that registration tokens must be kept secret.

What is firebase Swizzling?

The FCM SDK performs method swizzling in two key areas: mapping your APNs token to the FCM registration token and capturing analytics data during downstream message callback handling. Developers who prefer not to use swizzling can disable it by adding the flag FirebaseAppDelegateProxyEnabled in the app’s Info.

What is Swizzling in Swift?

Peter Steinberger. iOS Development Swift. Swizzling (other languages call this “monkey patching”) is the process of replacing a certain functionality or adding custom code before the original code is called. For example, you could swizzle UIViewController.

What is dynamic keyword in Swift?

Dynamic dispatch. It simply means that the Objective-C runtime decides at runtime which implementation of a particular method or function it needs to invoke. … Swift uses the Swift runtime whenever possible. The result is that it can make a number of optimizations.

What is Swizzling in IOS?

Swizzling is the act of changing the functionality of a method by replacing the implementation of that method with another, usually at runtime. There are many different reasons one might want to use swizzling: introspection, overriding default behavior, or maybe even dynamic method loading.

What is the difference between Swift 4 and 5?

Swift 5 is source compatible with Swift 4.2, but isn’t binary compatible with earlier Swift releases. However, future releases will be binary compatible with Swift 5 thanks to ABI stability. … You’ll find Swift Evolution proposal numbers like [SE-0001] in each section of the tutorial.