ios - 如何在显示之前在界面生成器(.xib)中配置子类 UIView？

Question

在我的应用程序中，我对 UIView 进行了子类化，它在 .m 文件中声明了三个 ivar(2UIButton 和一个 UITextField)。我通过从对象库中拖动 UIView 并将它们转换为我的子类来使用该对象。下面是我的实现

@interface Prescriber()<UITextFieldDelegate>
{
    UIButton *_addButton;
    UIButton *_lessButton;
    UITextField *_valueField;

}
@end
@implementation Prescriber
@synthesize value=_value,intValueofStrig=_intValueofStrig;
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    NSLog(@"prescriber called");
    return self;
}

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

    if (!_addButton) {
        _addButton=[[UIButton alloc]init];
        [_addButton addTarget:self action:@selector(addbuttonClicked:) forControlEvents:UIControlEventTouchUpInside];
        [_addButton setBackgroundImage:[UIImage imageNamed:@"add1.png"] forState:UIControlStateNormal];
        _addButton.layer.cornerRadius=5;

    }
    if (!_lessButton) {
        _lessButton=[[UIButton alloc]init];
        [_lessButton addTarget:self action:@selector(lessButoonClicked:) forControlEvents:UIControlEventTouchUpInside];
        [_lessButton setBackgroundImage:[UIImage imageNamed:@"Minus.png"] forState:UIControlStateNormal];
    }
    if (!_valueField) {
        _valueField=[[UITextField alloc]init];
        _valueField.delegate=self;
     }
   ///positioning the addbutton on left corner and right corner and position and   
                textfield in the center 


 }

我已经在 -(void)layoutSubviews 方法中完成了配置代码，因为我的 -initwithFrame 没有被调用，因为它们已经在 xib 文件中。我想知道的是，在 -layoutSubViews 中进行初始化是否正确，因为此方法有机会在下次调用。或者我可以调用-viewDidLoad 也像我的子类 View 的委托(delegate)方法吗？

编辑:- 通过创建 IBOutlet 是可能的，但这种方式对我来说是一个限制。

Answer 1

以私有(private)设置方法进行:

@interface MyViewClass ()
- (void)_setup;
@end

@implementation MyViewClass

- (void)_setup
{
    _addButton=[[UIButton alloc]init];
    [_addButton addTarget:self action:@selector(addbuttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [_addButton setBackgroundImage:[UIImage imageNamed:@"add1.png"] forState:UIControlStateNormal];
    _addButton.layer.cornerRadius=5;

    _lessButton=[[UIButton alloc]init];
    [_lessButton addTarget:self action:@selector(lessButoonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [_lessButton setBackgroundImage:[UIImage imageNamed:@"Minus.png"] forState:UIControlStateNormal];

    _valueField=[[UITextField alloc]init];
    _valueField.delegate=self;
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self != nil)
    {
        [self _setup];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
    if (self != nil)
    {
        [self _setup];
    }
    return self;
}

@end