1.1动态添加属性：
#import "Person.h"
#import <objc/runtime.h>
const char *homeKey = "homeKey";
@implementation Person
@dynamic home;
//通过运行时，动态添加属性
- (void)setHome:(NSString *)home {
[self willChangeValueForKey:home];
objc_setAssociatedObject(self, &homeKey, home, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[self didChangeValueForKey:home];
}
-(NSString *)home {
return objc_getAssociatedObject(self, &homeKey);
}
@end
1.2调用：
Person *p = Person.new;
p.home = @"上海虹口区";
NSLog(@"my home is %@",p.home);
1.3输出结果：
my home is 上海虹口区
2.1动态添加方法
//动态添加方法
SEL pSelector = NSSelectorFromString(@"addMethod:");
class_addMethod(p.class, pSelector, (IMP)pMethod, "v@:@");
if ([p respondsToSelector:pSelector]) {
[p performSelector:pSelector withObject:@"message"];
}
void pMethod(id self,SEL _cmd,NSString *str){
NSLog(@"给person添加一个方法addMethod %@",str);
}
2.2输出结果：
给person添加一个方法addMethod message
3.1动态添加属性检测
unsigned int count = 0;
Ivar *vars = class_copyIvarList(p.class, &count);
for (NSInteger i = 0; i < count; i++) {
Ivar var = vars[i];
NSLog(@"v = %s",ivar_getName(var));//通过取成员变量的方式无法拿到动态添加的属性home
}
objc_property_t *pros =class_copyPropertyList(p.class, &count);
for (NSInteger i = 0; i < count; i++) {
objc_property_t var = pros[i];
NSLog(@"p = %s",property_getName(var));//通过取全部属性的方式可以拿到动态添加的属性home
}
3.2检测结果
p = home
