NSObject和反射2

NSObject和反射2。

commend +R  run

id stu=[Student student]; // –>   Student *stu=[Student student];

:也是方法名的一部分

主要是反射：reflect 根据字符串来实例化一个对象

//#pragma mark reflect according to class name

void reflect(){

NSString *str=@”Person”;

Class class=NSClassFromString(str);//convert a string to a class

Person *person=[[class alloc]init];

NSLog(@”%@”,person);

[person release];

NSString *str=NSStringFromClass([Person class]);//obtain class name

}

//#pragma mark reflect method

Person.h

@interface Person:NSObject

-(void)test;

@end

Person.m

@implementation

-(void)test{

NSLog(@”Call test method in Person.”);

}

@end

void reflectmethod(){

NSString *method=@”test”;

//Convert this string to a method

//通过字符串调用方法名

SEL selector=NSSelectorFromString(method);

[person performSelector:(selector)];

[person release];

// Convert a(SEL) selector to a string

NSString *selectorName=NSStringFromSelector(selector);

}