如何将一个视图控制器中的字符串变量访问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，现在我想访问所有视图控制器中的字符串变量，但我知道在委托方法中声明变量，但我无法访问它，请帮帮我.

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控制器，子视图类是Viewcontroller1、viewcontroller2、viewcontroller3.而subwebview是所有三个viewcontroller(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).

现在我想从所有视图控制器(Viewcontroller1,Viewcontroller2,Viewcontroller3)访问subwebview中的字符串变量，我如何访问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的视图控制器，比如，

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.请帮帮我.

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

谢谢.

推荐答案

最简单的方法是传入对 parentViewController 的引用，然后您就可以通过该引用访问您的变量.不确定您使用的是什么类名，但类似这样:

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;

这当然需要您在子控制器中为父控制器创建一个属性:

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

ParentController *myParentController;

为其添加@property 和@synthesize

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