runtime获取属性，成员变量

unsigned int count = 0;

objc_property_t *propertys = class_copyPropertyList([UIDatePicker class], &count);

for(int i = 0;i < count;i ++){

//获得每一个属性

objc_property_t property = propertys[i];

//获得属性对应的nsstring

NSString *propertyName = [NSString stringWithCString:property_getName(property) encoding:NSUTF8StringEncoding];

//输出打印看对应的属性

NSLog(@"《》《》《》《》《》《》《》propertyname = %@",propertyName);

}

————————————————————————————

Ivar *ivars = class_copyIvarList([UIDatePicker class], &count);

for(int i =0;i < count;i ++){

Ivar ivar = ivars[i];

NSString *ivarName = [NSString stringWithCString:ivar_getName(ivar) encoding:NSUTF8StringEncoding];

NSLog(@"<><><><><><><><><><><>.ivarName = %@",ivarName);

}