objective-c – 在由.xib创建的UIViewController内添加一个Conta

如果您使用的是xib而不是故事板,则可以将简单的UIView添加到xib作为容器.然后在代码中,将您的childViewController的视图添加为容器的子视图.在这里,我已经遵循适当的子视图控制器方法和添加的布局约束,以确保其框架更新与容器的框架：

- (void)viewDidLoad {
    [super viewDidLoad];

    UIViewController *childViewController = ...; // create your child view controller

    [self addChildViewController:childViewController];
    [self.containerView addSubview:childViewController.view];
    [childViewController didMoveToParentViewController:self];

    NSArray *horzConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[childView]|"
                                                                   options:0
                                                                   metrics:nil
                                                                     views:@{@"childView" : childViewController.view}];

    NSArray *vertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[childView]|"
                                                                   options:0
                                                                   metrics:nil
                                                                     views:@{@"childView" : childViewController.view}];

    [self.view addConstraints:horzConstraints];
    [self.view addConstraints:vertConstraints];

    childViewController.view.translatesAutoresizingMaskIntoConstraints = NO;
}