Runtime动态扩展属性

源码

#import "BMKShape+DangMapSearch.h"#import@implementation BMKShape (DangMapSearch)

char* const newdituid = "dituid";

-(void)setDituid:(NSString *)dituid{

objc_setAssociatedObject(self,newdituid,dituid,OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

-(NSString *)dituid{

return objc_getAssociatedObject(self,newdituid);

}