ios – UIView addSubview并且不显示子视图

概述- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view from its nib. HeadViewController *headViewController = [[HeadViewController alloc] initWithNibN

- (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(0,320,120)];    [vIEw addSubvIEw:headVIEwController.vew];    [self.vIEw addSubvIEw:vIEw];}

headVIEwController.h：

@interface headVIEwController : UIVIEwController{    IBOutlet UIVIEw *vIEw;}@property (nonatomic,retain)IBOutlet UIVIEw *vIEw;@end

然后我将视图连接到文件的所有者.

而且我看不到headVIEwController.vIEw.

解决方法 首先,您不需要在headVIEwController类中定义视图插座.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(0,120);     [self.vIEw addSubvIEw:headVIEwController.vIEw];}

但是,如果您使用ARC(自动引用计数),则headVIEwController实例可能会在vIEwDIDLoad方法结束后释放.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：

- (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(0,120);     [self.vIEw addSubvIEw:headVIEwController.vIEw];}

和

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

在.m类实现文件开头的隐藏接口定义中.

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