Question

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    HeadViewController *headViewController = [[HeadViewController alloc] initWithNibName:@"HeadViewController" bundle:nil];    
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 120)];
    [view addSubview:headViewController.vew];
    [self.view addSubview:view];
}

HeadViewController.h：

@interface HeadViewController : UIViewController
{
    IBOutlet UIView *view;
}
@property (nonatomic, retain)IBOutlet UIView *view;
@end

我将视图连接到文件的所有者。

我无法看到headViewController.view。

Answer 1

首先，您无需在view课程中定义HeadViewController插座。它自动从UIViewController超类继承。

然后，我建议您直接将HeadViewController的视图添加到当前视图中。例如

- (void)viewDidLoad
{
     [super viewDidLoad];
     // Do any additional setup after loading the view from its nib.
     HeadViewController *headViewController = [[HeadViewController alloc] initWithNibName:@"HeadViewController" bundle:nil];    
     headViewController.view.frame = CGRectMake(0, 0, 320, 120);
     [self.view addSubview:headViewController.view];
}

但是，如果您使用ARC（自动引用计数），headViewController方法可能会在viewDidLoad方法结束后释放- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view from its nib. self.headViewController = [[HeadViewController alloc] initWithNibName:@"HeadViewController" bundle:nil]; headViewController.view.frame = CGRectMake(0, 0, 320, 120); [self.view addSubview:headViewController.view]; }实例。将该实例分配给您当前正在显示的控制器中的局部变量很方便（并且我说这是必须的）。这样，您可以在以后需要时处理其视图的组件，实例将被保留，其他所有内容都将完美运行。你应该有类似的东西：

@interface MyController ()
    @property (nonatomic, strong) HeadViewController *headViewController;
@end

和

.m

在{{1}}类实现文件开头的隐藏接口定义中。

Answer 2

这看起来像是一个错字 - 忘了我在.view

[查看addSubview：headViewController.vew];

Answer 3

我在语法中缺少

[查看addSubview：headViewController.view];

UIView addSubview并且不显示子视图

3 个答案: