- (void)viewDidLoad {
[super viewDidLoad];
id traget = self.navigationController.interactivePopGestureRecognizer.delegate;
UIPanGestureRecognizer * pan = [[UIPanGestureRecognizer alloc]initWithTarget:traget action:nil];
[self.view addGestureRecognizer:pan];
}
直接粘贴到viewDidLoad完事。
