loadNibNamed如何工作？UIView出口没有使用loadNibNamed进行初始化

我知道这是非常直接的,但是经过太多的拉毛后,我无法解决问题.

我看过教程解释如何使用XIB和所有创建视图.但它们都没有解决我在这里的情况.

我有一个XIB文件,一个自定义的UIView子类,它有很少的标签和按钮.UIView子类是可重用的,这就是我不能在任何单个View控制器中安装插座的原因.因此,我将此视图的各个控件(子视图)存储在我的自定义UIView本身中.这是合乎逻辑的,因为没有视图控制器应该拥有此自定义视图的子视图,该视图将包含在每个视图控制器中.

问题是,我不知道如何完全初始化整个UI.

这是我的UIView子类的代码:

@interface MCPTGenericView : UIView

+(id)createInstance : (bool) bPortrait;

@property (weak, nonatomic) IBOutlet UIView *topView;
@property (weak, nonatomic) IBOutlet UIView *titleView;
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
@property (weak, nonatomic) IBOutlet UIButton *logoButton;
@property (weak, nonatomic) IBOutlet UITextField *searchTextField;
@property (weak, nonatomic) IBOutlet UIButton *menuButton;
@end

后来,我也计划将这个相同的XIB文件用于这个UIView的横向,我计划在同一个XIB中使用相同的上面的出口和横向控制.

以下是实施:

@implementation MCPTGenericView
//@synthesize topView, titleLabel, titleView;

+(id)createInstance : (bool) bPortrait
{
    UIView * topLevelView = nil;
    MCPTGenericView * instance = [MCPTGenericView new];
    NSArray * views = [[NSBundle mainBundle] loadNibNamed:@"MoceptGenericView" owner:instance options:nil];

    int baseTag = (bPortrait)?PORTRAIT_VIEW_TAG_OFFSET:LANDSCAPE_VIEW_TAG_OFFSET;

    // make sure customView is not nil or the wrong class!

   for (UIView * view in views)
   {

       if (view.tag == baseTag)
       {
           topLevelView = view;
           break;
       }
   }

    instance.topView = (MCPTGenericView *)[topLevelView viewWithTag:baseTag + 1];
    instance.searchTextField = (UITextField *)[topLevelView viewWithTag:baseTag + 2];
    instance.menuButton = (UIButton *)[topLevelView viewWithTag:baseTag + 3];
    instance.logoButton = (UIButton *)[topLevelView viewWithTag:baseTag + 4];
    instance.titleView = [topLevelView viewWithTag:baseTag + 5];
    instance.titleLabel = (UILabel *)[topLevelView viewWithTag:baseTag + 6];

    return instance;
}

-(id)initWithCoder:(NSCoder *)aDecoder
{
    if ((self = [super initWithCoder:aDecoder]))
    {
        [self addSubview:[[[NSBundle mainBundle] loadNibNamed:@"MCPTGenericView" owner:self options:nil] objectAtIndex:0]];
    }
    return self;
}

-(void)awakeFromNib
{
    [super awakeFromNib];
    [self addSubview: self.titleView];
    [self addSubview:self.topView];
}

- (id) init
{
    self = [super init];
    if (self)
    {
        [[NSBundle mainBundle] loadNibNamed:@"MCPTGenericView" owner:self options:nil];
        [self addSubview:self.topView];
        [self addSubview:self.titleView];

    }
    return self;
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        // Initialization code
         [[NSBundle mainBundle] loadNibNamed:@"MCPTGenericView" owner:self options:nil];
        [self addSubview:self.topView];
        [self addSubview:self.titleView];
    }
    return self;
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

@end

有效的东西:

我成功地initWithFrame:frame从我的viewcontroller 调用了.这样,我可以看到所有控件都已正确初始化.但是,如果我已经绘制了XIB,为什么还要提供一个帧？不应该loadNibNamed处理帧设置和布局的东西,因为这是XIB的预期用途？

我也对loadNibNamed需要一个所有者对象的方式感到困惑.为什么我们已经需要一个对象来从XIB获取相同的对象？那也是一个半生不熟的？

请帮忙...