调用父视图控制器（通过navigationcontroller） [英] Call a parent view controller (through a navigationcontroller)

问题描述

目前我使用 pushViewController：animated：添加一个viewcontroller，现在从那个新的想要在我的parent控制器中调用一个方法。我想我会遇到导航控制器。

Currently I add a viewcontroller using pushViewController:animated: and now from within that new one would like to call a method inside my "parent"-controller. I think I get stuck at the navigationcontroller.

目前正在尝试这个以查看它是否是我想要的控制器：

Currently trying this to see if it's the controller I want:

if([self.superclass isKindOfClass:[MySuperController class]])
// and tried:
if([self.presentingViewController isKindOfClass:[MySuperController class]])

这两个都不起作用。

如何访问推送当前控制器的控制器（其中的方法）？

How can I access the controller (a method in it) that pushed the current one?

推荐答案

就像Marsson提到的那样，你需要使用委托...

Just like Marsson mentioned, you need to use delegate...

以下是一个示例：

在您的子视图控制器.h文件中：

In your child view controller .h file:

@protocol ChildViewControllerDelegate <NSObject>
- (void)parentMethodThatChildCanCall;
@end

@interface ChildViewController : UIViewController 
{
}
@property (assign) id <ChildViewControllerDelegate> delegate;

在您的子视图控制器.m文件中：

In your child view controller .m file:

@implementation ChildViewController
@synthesize delegate;


// to call parent method:
//  [self.delegate parentMethodThatChildCanCall];

在父视图控制器.h文件中：

In parent view controller .h file:

@interface parentViewController <ChildViewControllerDelegate>

在父视图控制器.m文件中：

In parent view controller .m file:

//after create instant of your ChildViewController
childViewController.delegate = self;

- (void) parentMethodThatChildCanCall
{
  //do thing
}

这篇关于调用父视图控制器（通过navigationcontroller）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！