从NSObject类调用presentModalViewController [英] Call presentModalViewController from NSObject class

问题描述

在我的子类 NSObject 我想调用

    [[self navController] presentModalViewController:myView animated:YES];

但我的尝试都没有成功。如果我不在 UIViewController ？

But none of my tries were successful. How can I call a modal view if I'm not in a subclass of UIViewController?

解决方案：

#import "myProjectNameAppDelegate.h"
// ...
MyViewController *myView = [[MyViewController alloc] init];
myProjectNameAppDelegate *appDelegate = (myProjectNameAppDelegate *)[[UIApplication sharedApplication] delegate];
[[appDelegate navController] presentModalViewController:myView animated:YES];

推荐答案

我看不到显示模态视图没有ViewController。你必须在类中存储对UIViewController的引用，所以你可以访问它。或者在您的AppDelegate中设置一个属性，您可以通过调用[[UIApplication sharedApplication] delegate];

I don't see a way to display a modal view without a ViewController. You have to store a reference to a UIViewController in your class so you can access it. Or setup a property in your AppDelegate, which you can get by calling [[UIApplication sharedApplication] delegate];

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