更改标签文字

Question

I'm developing an iOS application, using Xcode 4.6 to code in Objective-C. I have two screens connected by a push segue. In the first one I have a text field that will be filled by the user, and in the second one I have a label, and I want to fill that label text with the first screen text box text. I have also 1 class for each screen, so I have the FirstController.h, FirstController.m, SecondController.h, SecondController.m.

Answer 1

从第一个视图控制器转到第二个视图控制器时，可以在第二个视图控制器中将标签作为属性公开，然后在第一个视图控制器的方法（需要对此进行子类化）期间设置该标签：

[UIViewController prepareForSegue: sender:]

Answer 2

Make sure you have a segue created. You can then pass the data using:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    SecondController *second = [segue destinationViewController];
    second.label.text = textBox.text;

}

Answer 3

If you have the property of your label in your SecondViewController , you can use prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender method to set its text after creating an instance of the SecondViewController and calling for its property as

`secondViewController.myLabel.text = @"some text";

If you have your label as an instance variable, pass the text using an NSString for the label's text to second view as

`secondViewController.txtStr=@"some text";

and in SecondViewController ,set label's text in viewDidLoad method.