将数据传递回以前的viewcontroller

本文介绍了将数据传递回以前的viewcontroller的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试将数据传递回以前的viewController。

I am trying to pass data BACK TO previous viewController.

有谁知道如何将数据从ViewController B传回ViewController A？所以我想要一个字符串从'BIDAddTypeOfDealViewController转到BIDDCCreateViewController。用户编辑了viewController B，我希望在ViewController A中将编辑后的数据返回到我然后使用它。

Does anyone know how to pass data back from ViewController B to ViewController A? So I want a string to go 'from' BIDAddTypeOfDealViewController to BIDDCCreateViewController. A user edits viewController B and I want that edited data back in ViewController A where I then use it.

我正在使用。

If you are new to objective C, please look at What is Delegate.

在ViewControllerB.h中创建协议：

Create protocol in ViewControllerB.h :

#import <UIKit/UIKit.h>

@protocol senddataProtocol <NSObject>

-(void)sendDataToA:(NSArray *)array; //I am thinking my data is NSArray, you can use another object for store your information. 

@end

@interface ViewControllerB : UIViewController

@property(nonatomic,assign)id delegate;

ViewControllerB.m

@synthesize delegate;
-(void)viewWillDisappear:(BOOL)animated
{
     [delegate sendDataToA:yourdata];

}

：当您转到ViewControllerB时

in your ViewControllerA : when you go to ViewControllerB

ViewControllerA *acontollerobject=[[ViewControllerA alloc] initWithNibName:@"ViewControllerA" bundle:nil];
acontollerobject.delegate=self; // protocol listener
[self.navigationController pushViewController:acontollerobject animated:YES];

并定义你的功能：

-(void)sendDataToA:(NSArray *)array
{
   // data will come here inside of ViewControllerA
}

已编辑：

您可以看到此示例：如何将数据传回到之前的viewcontroller：

You can See this example : How you can Pass data back to previous viewcontroller: Tutorial link

这篇关于将数据传递回以前的viewcontroller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！