Question

我有一个UIViewController嵌入UINavigationController。我想提出这个viewController并在呈现之后我还需要导航方法（Push＆amp; Pop），所以我提交的是UINavigationController而不是UIViewController，但为此，我需要将自定义数据传递给我ViewController之前无法访问之前ViewController的{{1}}表单。这是我的代码。

ViewController

P.S当我从Storyboard设计导航控制器时，我无法UINavigationController *navigationController = [self.storyboard instantiateViewControllerWithIdentifier:@"MyNavigationIdentity"]]; [self presentViewController:navigationController animated:YES completion:nil];和alloc新init。

Answer 1

您只需使用ViewController属性

访问UINavigationController childViewControllers内嵌的

NSArray *viewControllers = [navigationController childViewControllers];
if (viewControllers.count > 0) {
    UIViewController *myViewController = (UIViewController *)[viewControllers firstObject];
}

即可

environments {
development {
    grails {
        mail {
            host = "smtp.gmail.com"
            port = 465
            username = "xxxxx@xxxxxx"
            password = jasypt
            props = ["mail.smtp.auth":"true",
                "mail.smtp.socketFactory.port":"465",
                "mail.smtp.socketFactory.class":"javax.net.ssl.SSLSocketFactory",
                "mail.smtp.socketFactory.fallback":"false"]

        }
    }
}
production {
    grails.logging.jul.usebridge = false
}

Answer 2

您可以从viewController的{{1}}媒体资源中访问viewControllers。

UINavigationController

通过NavigationController传递数据

2 个答案: