macos - ViewController 的视图未在 NSBox 中显示可可 Mac

Question

我对 Mac 开发的可可很陌生。我目前正在努力让 viewController 的视图显示为 NSBox 的 contentView。相关代码如下所示：

// AccountsViewController.h. ManagingViewController is a custom subclass of NSViewController
// as of Cocoa Programming for Mac.
@interface AccountsViewController : ManagingViewController
{
    LoginViewController *loginViewController;
}

@property (strong) IBOutlet NSBox *box; 

// Implementation

@implementation AccountsViewController
@synthesize box;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Initialization code here.

        // Should display the view in the contentView(!?!)
        loginViewController = [[LoginViewController alloc]   initWithNibName:@"LoginViewController" bundle:nil];
        box.contentView = loginViewController.view;
    }

    return self;
}

目前，框的 contentView 中没有显示任何内容。我应该怎么做才能让 viewControllers 视图进入框中？

Answer 1

问题是 init 添加/更改视图还为时过早。在 AccountsViewController 上实现awakeFromNib方法并在那里设置内容视图。加载 nib 并且一切都准备好进行操作后，将在您的类上调用 awakeFromNib。