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Questions tagged [toll-free-bridging]

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Using CF_SWIFT_NAME to import a C struct getter and setter that bridges to Foundation from Core Foundation

I have a struct, House, that I want usable in both Objective-C and in Swift (additionally, I just wanted to test the bounds of what I could and couldn't import from C to Swift). House is defined as follows: typedef struct { NSUInteger number; …
F. S.
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Why can't NSSpeechsynthesier's class method availableVoices be bridged to a Swift array of strings?

In Apple's Working with Cocoa Frameworks it reads as if the Foundation and Swift Foundation frameworks work together through bridging. However, I noticed that while attempting to use NSSpeechSynthesizer's class method availableVoices() it allows me…
Laurence Wingo
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Does CFBridgingRelease restore ownership to preexisting references without direct assignment?

If I have the following code: // objective C++ code .mm id texture = ...; void* ptr = (void*)CFBridgingRetain(texture); share_ptr_with_native_code(ptr); [texture do_stuff]; // is this valid? // native code .cpp void…
Mrb83
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Why use toll-free bridging for collections with custom memory-management semantics?

In the book Effective Objective-C 2.0: 52 Specific Ways to Improve Your iOS and OS X Program there is an Item 49: Use Toll-Free Bridging for Collections with Custom Memory-Management Semantics This chapter mainly explains the importance of…
PinkiePie-Z
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Why is Swift Dictionary not bridgeable?

Dictionary is a bridged type, why is it that I can switch from Swift dictionary to NSDictionary but not the other way around? (Compile Error: NSDictionary is not convertible to 'Dictionary') According to Apple's doc: All NSDictionary objects can be…
Boon
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OS X and FSEvents: How do you release a callback pointer supplied to an FSEventStreamRef?

I'm using FSEvents to monitor a directory, and whenever the directory changes I call a block which I originally passed into the FSEventStreamContext of the FSEventStreamRef. How do I release the block when it is time to stop monitoring the…
Steveo
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