FirstColor 跟 CornerRadious 都是新增的显示属性具体实现方法如下:
@property(nonatomic,weak)IBInspectable UIColor *firstColor;
/...................................../
- (void)setFirstColor:(UIColor *)firstColor{
_firstColor = firstColor;
self.backgroundColor = firstColor;
}
在定义的属性面前增加IBInspectable关键字 (视图已经拖到控制器上)
如果想让所有的View的某个属性都能在IB上显示的话可以新建View的category
@interface UIView (IBIspectable)
@property(nonatomic,assign)IBInspectable CGFloat cornerRadious;
/............在implementation添加IB_DESIGNABLE关键字........................./
IB_DESIGNABLE
@implementation UIView (IBIspectable)
- (void)setCornerRadious:(CGFloat)cornerRadious{
self.layer.cornerRadius = cornerRadious;
self.layer.masksToBounds = cornerRadious>0;
}
- (CGFloat)cornerRadious{
return self.layer.cornerRadius;
}