Can I use Swift enum in Objective-C?

Can I use Swift enum in Objective-C?

Swift imports as a Swift enumeration any C-style enumeration marked with the NS_ENUM macro. This means that the prefixes to enumeration value names are truncated when they are imported into Swift, whether they’re defined in system frameworks or in custom code. So, no, you can’t use a Swift enum in an Objective-C class.

What is enum in Objective-C?

enum , or enumerated value types, are the C way to define constants for fixed values, like days of the week, or available styles of table view cells. In an enum declaration, constants without explicit values will automatically be assigned values sequentially, starting from 0 .

Where do we declare enum in Objective-C?

If you want to use this myTypes enum somewhere in your code on other class, then you have to import the MyFirstClass. h in that class directly or indirectly. So the visibility of enum is, where it was defined. If u want to use the enum in all the class that u have then just create the seperate EnumConstants.

What is NS_ENUM?

The NS_ENUM and NS_OPTIONS macros provide a concise, simple way of defining enumerations and options in C-based languages. These macros improve code completion in Xcode and explicitly specify the type and size of your enumerations and options.

How do I create an enum in Objective-C?

Defining an enum Enums are defined by the following the syntax above. typedef NS_ENUM(NSUInteger, MyEnum) { MyEnumValueA, MyEnumValueB, MyEnumValueC, }; You also can set your own raw-values to the enumeration types. typedef NS_ENUM(NSUInteger, MyEnum) { MyEnumValueA = 0, MyEnumValueB = 5, MyEnumValueC = 10, };

How do I import a swift file into Objective-C?

Import Swift code into Objective-C within the same framework:

1. Under Build Settings, in Packaging, make sure the Defines Module setting for that framework target is set to Yes.
2. Import the Swift code from that framework target into any Objective-C .

How do you create an enum in Objective-C?

Can you call Swift from Objective-C?

Call Swift from Objective-C The Swift library cannot be directly called from Objective-C, since it is missing the required annotations in the code, and in many cases, modules do not inherit from NSObject, rather they use the native Swift data types.

Is Objective-C better than Swift?

Objective-C has a superior runtime compared to Swift. It’s probably going to be several years before Swift can catch up. If you’re using powerful SDKs, Objective-C is also your best option here as well. I’d still recommend that new developers start off learning Swift.

Can a swift enum be exported to Objective-C?

Swift enums can now be exported to Objective-C using the @objc attribute. @objc enums must declare an integer raw type, and cannot be generic or use associated values. Because Objective-C enums are not namespaced, enum cases are imported into Objective-C as the concatenation of the enum name and case name.

How to create a private enum in Swift?

From Swift, you can use .string on an enum (similar to .rawValue ). From Objective-C, you can use [ServiceProvider FieldNameToString:enumValue]; You can create an private Inner enum. The implementation is a bit repeatable, but clear and easy. 1 line rawValue, 2 lines init, which always look the same.

How to access enum values in Objective C?

However, you can access the enum values in objects that Objective C accepts, not as actual enum values. If you don’t mind to define the values in (Objective) C, you can use the NS_TYPED_ENUM macro to import constants in Swift.