self.navigationController.interactivePopGestureRecognizer.enabled = NO;
或
在使用之前先要判断是否ios7，不然会导致crash。然后创建一个自己的navigationController继承UINavigationController。之后还要设置UINavigationControllerDelegate，这样以上的方法才能触发。最后就判断要show出来的viewController是否需要支持划动返回了。
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{ if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
if (viewController.class == [MyViewController class])
{
self.interactivePopGestureRecognizer.enabled = NO;
} else {
self.interactivePopGestureRecognizer.enabled = YES;
}
}
}