December 2018
Intermediate to advanced
414 pages
10h 19m
English
Content preview from Hands-On Design Patterns with Swift
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Exposing Swift to Objective-C
In order to expose Swift to Objective-C, Xcode will generate a header for you, which contains all Swift classes and modules that can be exposed to Objective-C. In Xcode, you can set the value of that header by controlling SWIFT_OBJC_INTERFACE_HEADER_NAME.
There are many reasons why a Swift class can't be exposed to Objective-C, including the following:
- Using types that don't directly bridge to Objective-C
- Using generics
- Using pure Swift structs and classes
SWIFT_OBJC_INTERFACE_HEADER_NAME is usually set to $(SWIFT_MODULE_NAME)-Swift.h at the project level, which is a good default and unlikely to conflict with any other header declaration. Most of the time, $(SWIFT_MODULE_NAME) will be the name of your app. ...
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