将参数从视图传递回另一个视图的UITableView的单元格

问题描述

我有两种看法.第一:FirstViewController第二:SecondViewController

i have got two view.First: FirstViewControllerSecond: SecondViewController

FirstViewController 是我的 UINavigationController 的根控制器，在 FirstViewController 中，我有UITableView.在UITableView中单击一个单元格时，该视图将导航到 SecondViewController .在 SecondViewController 里面，我有UILabel.我想将此UILabel的值分配给在导航栏"中单击后退"按钮 时在FirstViewController 上单击的单元格.我应该怎么做才能实现这一点?

FirstViewController is my UINavigationController's root controller and inside FirstViewController I ve got UITableView. When a cell is clicked in UITableView, the view is navigated to SecondViewController. Inside SecondViewController i have UILabel. I want to assign this UILabel's value to the cell which is clicked at FirstViewController when Back button is clicked in Navigation Bar. What am i supposed to do to implement this?

我可以通过创建以下内容将值从FirstViewController传递给SecondViewController:

I can pass value to SecondViewController from FirstViewController by creating:

SecondViewController * sv;sv.somestring = someotherotherstring;

SecondViewController *sv;sv.somestring = someanotherstring;

但是不能在SecondViewController上实现此功能，以将值传递给FirstViewController中的NSString.

but can not implement this at SecondViewController to pass the value to a NSString in FirstViewController.

你能帮我吗?

谢谢.AE

推荐答案

是的，有很多简单的方法可以解决这个问题.....

Ya , there is much a easy way to handle this.....

您可以采用全局变量

在您的 Delegate.h 文件中声明您的变量:

In your Delegate.h file declare your variable:

@interface Smoke_ApplicationAppDelegate : NSObject {

  UIWindow *window;
  UINavigationController *navigationController;
  NSString *messageString;  //This would be your String Variable
}
 @property(nonatomic,retain)NSString *messageString;

其次是 Delegate.m 文件

@implementation Smoke_ApplicationAppDelegate

@synthesize window; 
@synthesize navigationController; 
@synthesize messageString; // Synthesize it over here..

完成.现在，您可以在所有/任何所需的类中使用此字符串变量.

This is Done .Now you can use this String Variable in All/any class you want..

要使用此全局变量.

只需 导入您的代理文件即可使它成为obj ....

Just import you Delegate file make the obj of it....

import "DelegateFile.h"

@implementation About

DelegateFile *appDel;

现在在您的班上.m

-(void)viewDidLoad { [super viewDidLoad];

appDel=[[UIApplication sharedApplication]delegate];

}

现在，您可以通过此对象在班上的任何地方访问它:

Now you can access it anywhere in your class by this Object:

appDel.messageString

只要认真按照我的步骤操作，我相信这肯定会为您提供帮助.....

Just follow my Steps Carefully , I am sure this is definitely going to help you.....

过着轻松的生活，

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