如何访问另一个 ViewController 上的 UITextView [英] How to access a UITextView on another ViewController

问题描述

我试图将 UITextView 的字符串从 anotherViewController 等于 MainViewController .我的意思是用户从 anotherViewController 在 UITextView 中写一些东西，当触摸完成按钮时， UITextView 中的字符串应该等于 MainViewController 中的另一个字符串.我如何访问 UITextView ???

I am trying to equal the string of an UITextView from anotherViewController to the MainViewController . I mean users write something in UITextView from anotherViewController and when touch the done button the string in UITextView should equal to another string in MainViewController . How can I access UITextView ???

我做了类似的事情，但没有得到任何结果！

I did something like this but did not get any result !

#import "AnotherViewController"

@class AnotherViewController;

@interface MainViewContoller : UIViewController {

    NSString *main_string;
    AnotherViewController *textEntered;

}

-(void)viewDidLoad {

textEntered.TEXT = main_string

}

***TEXT 是我在 AnotherViewController 上的 UITextView 的名字.

***TEXT is the name my UITextView on AnotherViewController .

@interface AnotherViewController : UIViewController {

    UITextView *TEXT;
    id  delegate;
}


@property (nonatomic, retain) IBOutlet UITextView *TEXT;
@property (nonatomic ,retain) id delegate;

@end


@implementation AnotherViewController
@synthesize TEXT ,delegate;


- (IBAction)doneButton {

    //!!! problem with compare ! the compiler got me some warning 
   [self dismissModalViewControllerAnimated:YES];
}

主视图控制器

#import "AnotherViewController.h"


@class Another...;

@interface MainViewControlelr : UIViewController {

NSString *main_string;

TextViewController *textEntered;

}


- (void)viewDidLoad
{

    textEntered.delegate = self;
    }


- (void) compareText {

    [textEntered.TEXT isEqual:main_string];

}

推荐答案

将 mainViewController 对象设置为 anotherViewController 类型的对象的委托.并使用来自 AnotherViewController 的委托将消息传递给 MainViewController.

Set mainViewController object as the delegate of an object of anotherViewController type. And use that delegate from AnotherViewController to pass messages to MainViewController.

在 MainViewController 中，当你创建另一个视图控制器对象时:

Inside MainViewController, when you create your AnotherViewController object do:

anotherVC.delegate = self;

在AnotherViewController 中，当您的按钮操作完成并且您想将文本传回时，比如说存储在一个字符串中.然后将其传递给 MainViewController 为:

And in AnotherViewController, when your button action is done and you want to pass the text back, say store in a string. Then pass it to MainViewController as:

[delegate compareText:textView.text];

compareText 与 NSString 参数将是 MainViewController 类中的一个方法.

compareText with a NSString argument would be a method in your MainViewController class.

在您的 AnotherViewController.h 界面中，声明一个 ivar:

In your AnotherViewController.h interface, declare an ivar:

id delegate;

然后使用@property(.h)和@synthesize(.m)作为getter和setter.

Then use @property (in .h) and @synthesize (in .m) for getter and setter.

然后做上面的.

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