Cannot get a correct buttonMask value from a UIGestureRecognizer instance
| Originator: | yinpengqi | ||
| Number: | rdar://FB8470648 | Date Originated: | |
| Status: | Open | Resolved: | |
| Product: | iOS/UIKit | Product Version: | |
| Classification: | Reproducible: | YES |
According to https://developer.apple.com/documentation/uikit/uigesturerecognizer/3538974-buttonmask?language=objc we can see that buttonMask is a new property added since ios 13.4.
However, during my development process, I found that I cannot get the correct value from a UIGestureRecognizer instance. It always equals to 0. Actually it should equals to 1 if current button is primary, 2 if secondary.
It is worth mentioning that we can get the correct value from its derived class like the following way,
```
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
NSLog(@“%s event.buttonMask:%d”, __func__, event.buttonMask);
}
```
Even so, we cannot access it from the base class instance, and 'buttonMask' is readonly, we cannot change its value.
If you think it is indeed a mistake, can you solve this problem? This will greatly help our development. Thank you very much!
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