How to solve the problem of right slide gesture failure caused by different hidden attributes of the two view controllers navigationBar using navigationController

How to solve the problem of right slide gesture failure caused by different hidden attributes of the two view controllers navigationBar using navigationController

### 1. problem description: for example, A is the rootViewController of navigationController, And the navigationBar is displayed on this page (the hidden attribute is NO). It pushes the stack to the B View Controller, B page navigationBar is not displayed (the hidden attribute is YES), there is A certain probability that it will appear, B needs to slide right to pop itself to stack A, the right slide gesture will become invalid, even if self. navigationController. interactivepopgsturerecognizer. enabled = YES does not work either.
### 2. Problem Analysis: Because the right-sliding gesture is blocked and the gesture still exists, you need to rewrite its proxy method so that the gesture is not blocked.
### 3. Solution steps:
#### 1. Write this line code on page B: self. navigationController. interactivepopgsturerecognizer. delegate = self;

#### 2. Enable page B to comply with the UIGestureRecognizerDelegate Protocol

#### 3. Override the GestureRecognizerDelegate method:
-(BOOL) gestureRecognizerShouldBegin :( UIGestureRecognizer *) gestureRecognizer {
If (self. navigationController. viewControllers. count <= 1 ){
Return NO; // prevents B from having only one page. At this time, the right slide gesture is not used.
}
Return YES;
}