小编JW *_*Lim的帖子

我正在为我的客户设计一个网站,并且在网页设计和CSS方面没有太多经验.我也想用标准的CSS方式设计它.

问题是我对CSS align属性和float属性很困惑.我知道这两个属性之间存在很大差异,但我仍然无法在开发时正确处理它.

谁能向我解释这两个属性之间的确切区别？

我在我的项目中使用SWRevealViewController,我想在应用程序收到通知时打开一个特定的控制器.我尝试了很多解决方案,但没有任何效果.

如何从AppDelegate显示特定的ViewController？

(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {

    UIApplicationState appState = UIApplicationStateActive;
    if ([application respondsToSelector:@selector(applicationState)]) {
        appState = application.applicationState;
    }
    application.applicationIconBadgeNumber = 0;
    if (appState != UIApplicationStateActive) {

        SWRevealViewController *navigationController = (SWRevealViewController *)self.window.rootViewController;
        UINavigationController *nav = (UINavigationController *)navigationController;
        UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil];
        PushNotificationsVC *controller = (PushNotificationsVC*)[mainStoryboard instantiateViewControllerWithIdentifier: @"PushNotificationsVC"];
        [nav pushViewController:controller animated:YES];

    } else {

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Notification"
                                                            message:[NSString stringWithFormat:@"%@",[[userInfo objectForKey:@"aps"] valueForKey:@"alert"]]
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"
                                                  otherButtonTitles:nil];
        [alertView show];
    }
}

我正在开发一个VPN项目..我对TUN/TAP有一点疑问.

如何以编程方式检查/检测C#中的系统上是否安装了TUN/TAP驱动程序？

如何正确公开延迟加载的多个字段,以便用户在Spring Data REST中可以GET/ PATCH/ POST/ DELETE多个实体关系？

例如,给定一个由多对多关系绑定的Student实体和Teacher实体,使用以下POJO:

@Entity
public class Teacher { // owner of bidirectional relationship
    @Id
    private int id;
    private String name;
    @ManyToMany(fetch = FetchType.LAZY)
    @JoinTable(name = "teacher_student",
            joinColumns = @JoinColumn(name = "teacher_id"),
            inverseJoinColumns = @JoinColumn(name = "student_id"))
    private Set<Student> students;

    // Constructor, getters/setters...
}

@Entity
public class Student {
    @Id
    private int id;
    private String name;
    @ManyToMany(mappedBy = "students", fetch = FetchType.LAZY)
    private Set<Teacher> …

如图所示，我的android studio中XML和java文件的标签栏消失了。

任何人都可以帮我解决这个问题吗？

我想通过单击按钮创建包含一些文本的文本文件.单击按钮后,我想选择保存文件的位置.我怎样才能做到这一点？

我正在使用C#windows应用程序表单.

我尝试使用下面的代码,但它要求我在代码中提供路径.我想要的是在运行时选择路径.

FileStream fs1 = new FileStream("D:\\file.txt", FileMode.OpenOrCreate, FileAccess.Write);
StreamWriter writer = new StreamWriter(fs1);
writer.Write("Hello");
writer.Close();