Swift and objective-c mixed programming--oc call Swift

Since I'm talking about the hybrid programming of Swift and OC, my last blog, Swift and objective-c mixed programming--swift call OC, is about calling OC code in a swift project, and now we're going to implement calling Swift code in the OC project, is also very convenient. The specific implementation steps are as follows:

(1) Create an iOS project, language select OC, device select iphone.

(2) Then right-click on the project, New Files, select Cocoa Touch Class, then select Swift in the language. Inherit from NSObject. New, there will be a dialog box, select Yes.

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(3) A swift class and a bridging-header.h file are now in the directory structure,

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(4) Then in the new Helloswift.swift class, write a method, and then use OC to invoke.

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(5) Then import the hidden header file of a project in the project's VIEWCONTROLLER.M file, in the format #import "project name-swift.h". and call Swift's SayHello method in Viewdidload (), The specific code is as follows:

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(6) Run the program, the output is as follows: It is in line with our expectations.

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With these implementations, we can invoke swift programs in a project based on OC Development, greatly improving our development efficiency, and we no longer have to dwell on the use of Swift or OC-based.

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Swift and objective-c mixed programming--oc call Swift