Accessing global const CGFloat defined in an Objec

2019-04-30 18:18发布

I have defined some constants in my .m files that I need to access form my swift code. They are defined:

const CGFloat testValue = 40.0;

and in my other objective-c .m files I can access them by using extern:

extern const CGFloat testValue

Is there an equivalent way of making these constants accessible from the .swift files?

2条回答
看我几分像从前
2楼-- · 2019-04-30 18:21

Just put the var declaration above the class - it will become a global variable.

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我命由我不由天
3楼-- · 2019-04-30 18:30

Add the extern to your bridging header and Swift should be able to access it.

This simple test worked for me:

ObjCTest.m

#import <Foundation/Foundation.h>

const CGFloat testValue = 40.0;

ObjCSwiftBridgeTest-Bridging-Header.h

#import <Foundation/Foundation.h>

extern const CGFloat testValue;

main.swift

println(testValue);

Output

40.0
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