iOS禁用侧滑返回手势要点解析

-(void)viewDidAppear:(BOOL)animated { 
  [super viewDidAppear:animated]; 
  if([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) { 
    self.navigationController.interactivePopGestureRecognizer.enabled = NO; 
  } 
} 
-(void)viewWillDisappear:(BOOL)animated { 
  [super viewWillDisappear:animated]; 
  if([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) { 
    self.navigationController.interactivePopGestureRecognizer.enabled = YES; 
  }; 
}
```oc