为什么要“添加子视图”不工作?
我尝试添加子视图但不起作用。我的代码是:
HomeViewController* homeViewController = [[HomeViewController alloc] initWithNibName:@"HomeView" bundle:nil];
NSViewController *viewController = homeViewController;
[mainView addSubview: [viewController view]];
NSLog(@"%@",[viewController view]);
NSLog(@"%@",[[viewController view]superview]);
NSLog(@"%@",[mainView subviews]);
NSLog 在控制台中写入:
HTPC[1467:a0f] <HomeView: 0x10042e9f0>
HTPC[1467:a0f] (null)
HTPC[1467:a0f] (null)
为什么 addsubview 不起作用?当我运行我的应用程序时,会出现 HomeView,但我无法将其用作子视图。
I try add subview but not work. My code is:
HomeViewController* homeViewController = [[HomeViewController alloc] initWithNibName:@"HomeView" bundle:nil];
NSViewController *viewController = homeViewController;
[mainView addSubview: [viewController view]];
NSLog(@"%@",[viewController view]);
NSLog(@"%@",[[viewController view]superview]);
NSLog(@"%@",[mainView subviews]);
The NSLog write in console:
HTPC[1467:a0f] <HomeView: 0x10042e9f0>
HTPC[1467:a0f] (null)
HTPC[1467:a0f] (null)
Why addsubview don't work? When I run my app HomeView appears but I can't use it as subview.
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在我看来,执行此代码时
mainView
是nil
。Looks to me like
mainView
isnil
at the time this code is executed.