如何在一个视图控制器中访问字符串变量到另一个视图控制器 [英] How to Access String Variable in One View Controller to Another view Controller

问题描述

我是iphone开发的新手，现在我想在所有视图控制器中访问字符串变量，但我知道在委托方法中声明变量，但我无法访问它，请帮助我。

I am new to iphone development, Now i want to access the string variable in all the view controller, but i know to declare the variables in delegate method, but i cant access it, please help me out.

Mainviewcontroller - > Viewcontroller1 _--> viewcontroller2 - > viewcontroller3 - > subwebview。

Mainviewcontroller-->Viewcontroller1_-->viewcontroller2-->viewcontroller3-->subwebview.

我创建了一个主视图controller和subview类是Viewcontroller1，viewcontroller2，viewcontroller3。 subwebview是所有三个viewcontrollers（Viewcontroller1，Viewcontroller2，Viewcontroller3）的子类。

i have created one main view controller and the subview class are Viewcontroller1,viewcontroller2,viewcontroller3. And the subwebview is the subclass of all the three viewcontrollers(Viewcontroller1,Viewcontroller2,Viewcontroller3).

现在我想从所有viewcontrollers访问子网站中的字符串变量（Viewcontroller1 ，Viewcontroller2，Viewcontroller3），如何访问SUBWEBVIEW中的字符串变量。

Now i want to access the string variables in subwebview from the all viewcontrollers(Viewcontroller1,Viewcontroller2,Viewcontroller3), How can i access the string variables in SUBWEBVIEW.

我正在使用Rss提要阅读器并检索数据。

I am using Rss feed reader and retrieved the datas.

我已经在我的字符串变量中声明了所有视图控制器，例如，

i have declared all the view controllers in my string variables like,

 NSString * currentElement;
 NSMutableString * currentTitle, * currentDate, * currentSummary, * currentLink;

我被困在这里。我无法继续。请帮助我。

i am stuck here. and i am not able to proceed.please help me out.

谢谢。

推荐答案

最简单的方法是只传入对parentViewController的引用，然后通过该引用访问变量。不确定你使用的类名是什么类似的：

The easiest is to just pass in a reference to the parentViewController and then you can access your variables through that reference. Not sure what class names you are using but something like this:

MyChildController *tmpViewController = [[MyChildController alloc] initWithNibName:@"ChildView" bundle:nil];
tmpViewController.myParentController = self;

这当然要求你在子控制器中为父控件创建一个属性：

This of course requires you to create a property in the child controller for the parent one:

ParentController *myParentController;

添加 @property 和 @synthesize 也适用于它

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