Question

我是robovm的新手。我正在使用Eclipse Juno。我刚刚更新到最新的robovm安装。在升级之前，ios演示应用程序会短暂运行，然后崩溃。它只会崩溃如果代码尝试创建UINavigationControllerDelegate。

当我尝试创建UINavigationControllerDelegate时，我得到了这个异常：

Exception in thread "main" java.lang.UnsupportedOperationException: Cannot create instances of MyNavControllerDelegate
at org.robovm.objc.ObjCObject.alloc(ObjCObject.java)
at org.robovm.objc.ObjCObject.<init>(ObjCObject.java)
at MyNavControllerDelegate.<init>(MyNavControllerDelegate.java)
at IOSDemo.didFinishLaunching(IOSDemo.java)
at org.robovm.apple.uikit.UIApplicationDelegate$ObjCProxy.$cb$application$didFinishLaunchingWithOptions$(Unknown Source)
at org.robovm.apple.uikit.UIApplication.main(Native Method)
at org.robovm.apple.uikit.UIApplication.main(UIApplication.java)
at IOSDemo.main(IOSDemo.java)

以下是UINavigationControllerDelegate的实现。实施还没有做任何事情。我只想测试robovm运行典型代码的能力。

import org.robovm.apple.uikit.UIInterfaceOrientation;
import org.robovm.apple.uikit.UINavigationController;
import org.robovm.apple.uikit.UINavigationControllerDelegate;
import org.robovm.apple.uikit.UINavigationControllerOperation;
import org.robovm.apple.uikit.UIViewController;
import org.robovm.apple.uikit.UIViewControllerAnimatedTransitioning;
import org.robovm.apple.uikit.UIViewControllerInteractiveTransitioning;
import org.robovm.objc.annotation.Method;
import org.robovm.rt.bro.annotation.MachineSizedUInt;

public class MyNavControllerDelegate extends org.robovm.objc.ObjCObject implements UINavigationControllerDelegate  {
    @Override
    @Method(selector = "navigationController:willShowViewController:animated:")
    public void willShowViewController(UINavigationController navigationController, UIViewController viewController, boolean animated) {
    }

    @Override
    @Method(selector = "navigationController:didShowViewController:animated:")
    public
    void didShowViewController(UINavigationController navigationController, UIViewController viewController, boolean animated) {
    }

    @Override
    @Method(selector = "navigationControllerSupportedInterfaceOrientations:")
    @MachineSizedUInt
    public
    long getSupportedInterfaceOrientations(UINavigationController navigationController) {
        return 0;
    }

    @Override
    @Method(selector = "navigationControllerPreferredInterfaceOrientationForPresentation:")
    public
    UIInterfaceOrientation getPreferredInterfaceOrientation(UINavigationController navigationController) {
        return null;
    }

    @Override
    @Method(selector = "navigationController:interactionControllerForAnimationController:")
    public
    UIViewControllerInteractiveTransitioning getInteractionController(UINavigationController navigationController, UIViewControllerAnimatedTransitioning animationController) {
        return null;
    }

    @Override
    @Method(selector = "navigationController:animationControllerForOperation:fromViewController:toViewController:")
    public
    UIViewControllerAnimatedTransitioning getAnimationController(UINavigationController navigationController, UINavigationControllerOperation operation, UIViewController fromVC, UIViewController toVC) {
        return null;
    }
}

Answer 1

更改您的MyNavControllerDelegate课程，使其扩展UINavigationControllerDelegateAdapter，然后删除所有@Method注释。

你如何实现UINavigationControllerDelegate？

1 个答案: