IB_DESIGNABLE 未在情节提要中呈现

Question

#import "UIViewTest.h"

@implementation UIViewTest

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


- (id) initWithCoder:(NSCoder *)coder{
    self = [super initWithCoder:coder];
    if(self){
        self.backgroundColor = UIColor.redColor;
    }
    
    return self;
    
}

- (id)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    
    if(self){
        self.backgroundColor = UIColor.redColor;
    }
    
    return self;
}

@end

我有这段代码可以在设备上运行，但在 IB 中似乎不起作用，

IB_DESIGNABLE @interface  UIViewTest : UIView
@end

我尝试将目标设置为继承，尝试指定模块但似乎没有任何效果。

Answer 1

实施prepareForInterfaceBuilder:

- (void)prepareForInterfaceBuilder {
    self.backgroundColor = UIColor.redColor;
}

（如果重复困扰您，重构。）

IB_DESIGNABLE 未在情节提要中呈现

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