一个UIButton的selected属性的坑

selected无法重写setter 方法，一次在分类里边强写不赋值，以为只要不引入这个分类其他button不受影响，结果不行。

#import"UIButton+addSelectColor.h"

#import

@implementationUIButton (addSelectColor)

staticchar* keySelectColor ="keySelectedColor";

staticchar*keyNormalColor ="keyNormalColor";

staticchar*keyTitleSelectedColor ="keyTitleSelectedColor";

staticchar*keyTitleNormalColor ="keyTitleNormalColor";

-(void)setSelectedColor:(UIColor*)selectedColor

{

objc_setAssociatedObject(self, &keySelectColor, selectedColor,OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

-(UIColor*)selectedColor

{

returnobjc_getAssociatedObject(self, &keySelectColor);

}

-(void)setNormalColor:(UIColor*)normalColor

{

objc_setAssociatedObject(self, &keyNormalColor, normalColor,OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

-(UIColor*)normalColor

{

returnobjc_getAssociatedObject(self, &keyNormalColor);

}

-(void)setTitleSelectedColor:(UIColor*)titleSelectedColor

{

objc_setAssociatedObject(self, &keyTitleSelectedColor, titleSelectedColor,OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

-(UIColor*)titleSelectedColor

{

returnobjc_getAssociatedObject(self, &keyTitleSelectedColor);

}

-(void)setTitleNormalColor:(UIColor*)titleNormalColor

{

objc_setAssociatedObject(self, &keyTitleNormalColor, titleNormalColor,OBJC_ASSOCIATION_RETAIN);

}

-(UIColor*)titleNormalColor

{

returnobjc_getAssociatedObject(self, &keyTitleNormalColor);

}

-(void)setTabSelected:(BOOL)tabSelected

{

if(tabSelected ==YES) {

self.backgroundColor=self.selectedColor;

[selfsetTitleColor:self.titleSelectedColorforState:UIControlStateNormal];

}else{

self.backgroundColor=self.normalColor;

[selfsetTitleColor:self.titleNormalColorforState:UIControlStateNormal];

}

}

//-(void)setSelected:(BOOL)selected

//{

////self.selected = selected;

//if (selected == YES) {

//self.backgroundColor = self.selectedColor;

//[self setTitleColor:self.titleSelectedColor forState:UIControlStateNormal];

//} else {

//self.backgroundColor = self.normalColor;

//[self setTitleColor:self.titleNormalColor forState:UIControlStateNormal];

//}

//}

//

最后注掉这些，重写了一个方法-(void)setTabSelected:(BOOL)tabSelected来代替实现.

看来一旦在分类里边重写UIKit的方法，所有地方都会被重写，这很危险。