Question

在一个新项目中，我有2个视图控制器（View1和View2）我在View1中有一个按钮，在View2中有一个标签。当我在View1中按下此按钮时，我希望当我转移到View2页面时，按钮的名称/标题出现在View2的标签上。我怎么能这样做？

我查看过这个页面但没有真正理解：Passing button title to a new view

Answer 1

创建一个新的CocoaTouch类SecondViewController，为UIViewController创建XIB的子类并为IBOutlet创建label

声明变量：

var labelTitle: String!

中的

SecondViewController

SecondViewController ViewDidLoad将如下所示：

override func viewDidLoad() {
            super.viewDidLoad()

            titleLabel.text = labelTitle
}

// Whereas titleLabel is the UILabel Outlet connected from XIB

现在在您的FirstViewController，按钮上点击操作

添加以下内容

@IBAction func buttonAction(sender : UIButton) {
    // If the VCs are in a storyboard you will need to get the storyboard to access them
    let mainStoryboard = UIStoryboard(name: "Main", bundle: nil) as UIStoryboard
    let secondVC = mainStoryboard.instantiateViewControllerWithIdentifier("SecondViewController") as! SecondViewController
    secondVC.labelTitle = sender.titleLabel?.text

    // If not do this
    let secondVC = SecondViewController.init(nibName: "SecondViewController", bundle: nil)
    secondVC.labelTitle = sender.titleLabel?.text
}

//Next present or push your ViewController

Answer 2

- 在View2上创建用于接受按钮标题的属性

@interface View2 : UIViewController {

}
@property (nonatomic, strong) IBOutlet UILabel *lblTitle;
@property (nonatomic, strong) NSString *btnTitle;

- (void)viewDidLoad {
    [super viewDidLoad];
   self.lblTitle.text = self.btnTitle;
}

在View1中

  @interface View1 : UIViewController {

    }
    @property (nonatomic, strong) IBOutlet UIButton *btn;

    - (void)myButtonClicked:(id)sender{

    View1 *newViewController = [[View1 alloc] initWithNibName:'View1' bundle:nil];
    newViewController.btnTitle = self.btn.titleLabel.text;

    // push or present controller

    }

如何将按钮标题传递给不同视图控制器中的标签

2 个答案: