ViewController的视图没有在带有cocoa Mac的NSBox中显示

Question

我对Mac开发的可可很新。我目前正在努力将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，框中的contentView中没有显示任何内容。我该怎么做才能将viewControllers视图放入框中？

Answer 1

问题是init太早，无法添加/更改视图。在AccountsViewController上实现awakeFromNib方法并在其中设置内容视图。在加载nib并准备好操作所有内容之后，将在您的类上调用awakeFromNib。