Cocoa：从另一个类调用App Delegate方法 [英] Cocoa: Call App Delegate Method from another Class

问题描述

我目前正试图从自定义视图中的拖放操作获取文件的路径，然后将该路径传递给我的应用程序委托。我目前正在使用以下内容：

I'm currently trying to get the path of a file from a drag and drop operation inside of a custom view, and then pass that path to my app delegate. I'm currently using the following:

- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender 
{

    NSPasteboard *pb = [sender draggingPasteboard];
    NSString *type = [pb availableTypeFromArray:[NSArray arrayWithObject:NSFilenamesPboardType]];
    NSArray *array = [[pb stringForType:type] propertyList];

    //access the app delegate
    NSApplication *myApplication;
    myApplication = [NSApplication sharedApplication];

    [myApplication uploadFiles:array];

    return NO;

} 

但是，我一直收到一条消息，委托没有响应uploadFiles方法。它在我的应用程序代理中声明。我以正确的方式访问NSApplication？

However, I keep getting a message that says that my app delegate doesn't respond to the "uploadFiles" method. It is declared inside of my app delegate. Am I accessing the NSApplication in the correct manner?

谢谢。

推荐答案

p>我相信问题是你指的是应用程序，而不是它的委托。这应该可以工作：

I believe the problem is that you're referring to the application but not its delegate. This should work:

Mac

[(YourAppDelegate *)[[NSApplication sharedApplication] delegate] uploadFiles:array]

实际的应用程式委托名称，并确定要#import它。

replacing YourAppDelegate with your actual app delegate name, and being certain to #import it.

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