ios - 在不同的 View Controller 中执行一个 Action

Question

在我的应用程序中，我试图创建一个带有按钮的按钮。我现在的代码如下:

- (IBAction)doneTextField:(id)sender {

    YourShortcutsViewController *YSVC2 = [self.storyboard instantiateViewControllerWithIdentifier:@"ViewController2"];
    YSVC2.stringFromTextField = self.textField.text;
    [self presentViewController:YSVC2 animated:YES completion:nil];

    {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

        btn.frame = CGRectMake(0, 0, 100, 50);
        [btn addTarget:self action:@selector(newButtonClicked) forControlEvents:UIControlEventTouchUpInside];
            [btn setTitle:@"FaceTime" forState:UIControlStateNormal];
        [self.view addSubview:btn];

    }
}

这可行，但我需要添加的按钮添加到不同的 View Controller 中，而不是代码所在的 View Controller 中。我该怎么做？谢谢

Answer 1

您需要创建一个函数来在新的 View Controller 中添加按钮:

在 YourShortcutsViewController.h 中:

-(void)addFaceTimeButton:(UIButton*);

在 YourShortcutsViewController.m 中:

-(void)addFaceTimeButton:(UIButton*){
    [self.view addSubview:btn];
}

然后将您的代码更改为:

- (IBAction)doneTextField:(id)sender {

    YourShortcutsViewController *YSVC2 = [self.storyboard instantiateViewControllerWithIdentifier:@"ViewController2"];
    YSVC2.stringFromTextField = self.textField.text;
    [self presentViewController:YSVC2 animated:YES completion:nil];

    UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

    btn.frame = CGRectMake(0, 0, 100, 50);
    [btn addTarget:self action:@selector(newButtonClicked) forControlEvents:UIControlEventTouchUpInside];
    [btn setTitle:@"FaceTime" forState:UIControlStateNormal];

    [YSVC2 addFaceTimeButton:btn];

}