Question

在我的应用程序中，我正在尝试使用按钮创建一个按钮。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];

    }
}

这有效，但我需要添加的按钮添加到不同的视图控制器中，而不是代码所在的视图控制器。我该怎么办？谢谢

Answer 1

您需要创建一个函数来在新视图控制器中添加按钮：

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];

}

在不同的视图控制器中执行操作

1 个答案: