如何使用popover segue从secondView将字符串值发送到mainView?

本文介绍了如何使用popover segue从secondView将字符串值发送到mainView?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

我想将字符串值从secondView发送到mainView，但是我单击确定"按钮，使用此代码[self dismissViewControllerAnimated:YES completion:nil];，然后准备segue无法正常工作.当我想单击确定"按钮时，我将textfield值发送到mainView控制器.

i want to send string value from secondView to mainView but I click OK button use this code [self dismissViewControllerAnimated:YES completion:nil]; and then prepare segue not working. When I want to click OK button, I send in textfield value to mainView controller.

感谢回复.

推荐答案

在主视图控制器(包含标签)头文件中，声明标签的出口:

In your Main View Controller (That contains the label) header file declare the outlet for the label:

@property (nonatomic, weak) IBOutlet UILabel *nameLabel;

在您的SettingsViewController.m中，导入您的ViewController.h.并更改下面的OK按钮l.ke>

In Your SettingsViewController.m import your ViewController.h. And change the OK button l.ke below>

- (IBAction)goBack:(id)sender
{
    ViewController *vCtrl = (ViewController *)self.presentingViewController;
    vCtrl.nameLabel.text  = yourTextField.text;
    [self dismissViewControllerAnimated:YES completion:nil];
}

由于OP正在使用UINavigationController并推送segues进行导航，因此该方法应更改为:

As OP is using UINavigationController and push segues for navigating, the method should be changed to:

- (IBAction)goBack:(id)sender
{
    ViewController *vCtrl = (ViewController *)[[(UINavigationController *)self.presentingViewController viewControllers] lastObject];
    vCtrl.nameLabel.text  = yourTextField.text;
    [self dismissViewControllerAnimated:YES completion:nil];
}

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