复用时，H5 跳转页面，点导航返回异常 #78
Description
test code
NSString *url = @"https://www.baidu.com/";
WebViewController *web = [[WebViewController alloc] initWithUrl:url];
[self.navigationController pushViewController:web animated:YES];{{ message }}
test code
NSString *url = @"https://www.baidu.com/";
WebViewController *web = [[WebViewController alloc] initWithUrl:url];
[self.navigationController pushViewController:web animated:YES];