[ASTextKitComponents] Make sure Main Thread Checker isn't triggered during background calculations #trivial #612
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… upsetting Main Thread Checker - Add a new thread-safe text view bounds. - Temporary components stack doesn't have a text view so it can be safely deallocated off main.
nguyenhuy
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maicki
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Oct 12, 2017
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| #import <tgmath.h> | ||
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| @interface ASTextKitComponentsTextView () | ||
| @property (nonatomic, assign) CGRect threadSafeBounds; |
bernieperez
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Apr 25, 2018
…uring background calculations #trivial (TextureGroup#612) * Add unit test * Make sure TextKit components can calculate size in background without upsetting Main Thread Checker - Add a new thread-safe text view bounds. - Temporary components stack doesn't have a text view so it can be safely deallocated off main. * Add ASTextKitComponentsTextView * Remove unnecessary change * Fix minor mistake * ASTextKitComponentsTextView has only 1 initializer * Minor change * Switch to atomic property * Remove manual synthesization
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Currently the checker is triggered either when the components need to get the backing text view's bounds, or when the text view's delegate is cleared out during deallocation.
In the first case, I add a new subclass of UITextView that has a thread-safe bounds property and is used exclusively by ASTextKitComponents.
The second case is handled in #598. However, a new main thread assertion added in #603 causes background deallocations of temporary components to fail. #610 attempts to fix that, but since temporary components don't have a reference to a text view, it's fine to avoid the assertion altogether.