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POHow to use __bridge for ARC correctly
 

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  1. POHow to use __bridge for ARC correctly
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    <p>I changed the code shown below into ARC compatible.</p> <p>I just changed it as Xcode suggested, and it doesn't show error on Xcode. But the code crushes once the event happens. Does anybody have an idea to fix this?</p> <p>I'm not sure if this crush happens because of acapela SDK, or not.</p> <p><strong>This is non ARC code, it works fine.</strong></p> <pre><code>void MyInterruptionListener(void *inClientData, UInt32 inInterruptionState) { AcapelaSpeech* anAcapelaSpeech = *(AcapelaSpeech**)inClientData; if (inInterruptionState == kAudioSessionBeginInterruption) { [anAcapelaSpeech setActive:NO]; status = AudioSessionSetActive(NO); } if (inInterruptionState == kAudioSessionEndInterruption) { status = AudioSessionSetActive(YES); [anAcapelaSpeech setActive:YES]; } } </code></pre> <p><strong>This is ARC compatible, but it crushes on [anAcapelaSpeech setActive:NO];.</strong></p> <pre><code>void MyInterruptionListener(void *inClientData, UInt32 inInterruptionState) { AcapelaSpeech* anAcapelaSpeech = (__bridge_transfer AcapelaSpeech*)inClientData; if (inInterruptionState == kAudioSessionBeginInterruption) { [anAcapelaSpeech setActive:NO]; AudioSessionSetActive(NO); } if (inInterruptionState == kAudioSessionEndInterruption) { AudioSessionSetActive(YES); [anAcapelaSpeech setActive:YES]; } } </code></pre> <p><strong>Additional info.</strong> I'm using Acapela audio SDK, audio interruption code is shown on the 9.Interruptions of this PDF. <a href="http://www.ecometrixem.com/cms-assets/documents/44729-919017.acapela-for-iphone.pdf" rel="nofollow noreferrer">http://www.ecometrixem.com/cms-assets/documents/44729-919017.acapela-for-iphone.pdf</a></p> <p>This is the screenshot for the crush. <img src="https://i.stack.imgur.com/h1C1b.png" alt="enter image description here"></p> <p><strong>SOLVED</strong> This code works, thanks.</p> <pre><code>void MyInterruptionListener(void *inClientData, UInt32 inInterruptionState) { AcapelaSpeech *anAcapelaSpeech = (__bridge id) (*(void **) inClientData); if (inInterruptionState == kAudioSessionBeginInterruption) { [anAcapelaSpeech setActive:NO]; AudioSessionSetActive(NO); } if (inInterruptionState == kAudioSessionEndInterruption) { AudioSessionSetActive(YES); [anAcapelaSpeech setActive:YES]; } } </code></pre>
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    1. USRichard J. Ross III
    1. USNon Umemoto
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    1. CO__bridge_retained is for CF objects and objects that require a reference to be kept to them. __bridge is used for NSObjects who don't require retention.
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    2. COThanks for your explanation. :)
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