Processing of NFCTagReaderSession invalidate() is slow on iOS14.

App & System Services Core OS
Developer2021 OP
Created May ’21
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If you run NFCTagReaderSession.invalidate () after the NFC has finished reading, it will take 2-3 seconds slower for iOS 14 to call back didInvalidateWithError than for iOS 13.

The verified app was created with xcode 12.4. The device for iOS 13 is iPhone X. The device for iOS 14 is iPhone 11.

In iOS13, it takes 0.01 [s] from calling invalidate () to the callback method.

In iOS14, it takes 2.913 [s] from calling invalidate () to the callback method.

I don't understand why iOS 14 was slow.

Replies  1
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TonECCT OP
Jun ’21

I have exactly the same experience, using Xcode 12.5 and an iPhone 7 with iOS 14.4.2. Did not yet find a solution or workaround... Anyone tried it with 14.6 yet?

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Processing of NFCTagReaderSession invalidate() is slow on iOS14.
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