oc反射机制有三个用途：
1.获得Class
Class LoginViewController = NSClassFromString(@"LoginViewController");
NSString *str = NSStringFromClass([LoginViewController class]);
2.检查继承关系
// 判断对象是否为某个类的实例对象
[person isMemberOfClass:Person.class]
// 判断实例对象是都为某个类及其子类的实例
[person isKindOfClass:[person class]]
// 判断的实例对象是否实现了指定的协议
[person conformsToProtocol:@protocol(UITableViewDelegate)]
3.动态的调用方法
SEL selector = NSSelectorFromString(@"SelectorFirstParameter:SecondParameter:");
if([self respondsToSelector:selector])
{
[self performSelector:@selector(SelectorFirstParameter:SecondParameter:) withObject:@"firstParameter" withObject:@"secondParameter"];
}
- (void)SelectorFirstParameter:(NSString *)first SecondParameter:(NSString *)second{
NSLog(@"Logs %@ %@", first, second);
}
NSString *str = NSStringFromSelector(@selector(login));