runtime的我的简单封装

Runtime是想要作好iOS开发，或者说是真正的深入的掌握OC这门语言所必需理解的东西。最近在学习Runtime，有本身的一些心得，整理以下，

一为 查阅方便

二为 或许能给他人一些启发，

三为 但愿获得你们对这篇整理不足之处的一些指点。

什么是Runtime

咱们写的代码在程序运行过程当中都会被转化成runtime的C代码执行，例如[target doSomething];会被转化成objc_msgSend(target, @selector(doSomething));。

OC中一切都被设计成了对象，咱们都知道一个类被初始化成一个实例，这个实例是一个对象。实际上一个类本质上也是一个对象，在runtime中用结构体表示。

 可是单纯的去调用又显得很麻烦，全部就本身简单的封装了几个方法，能够和你们一块儿交流学习

/**
 获取类名

 @param class <#class description#>
 @return <#return value description#>
 */
+  (NSString *)fetchClassName:(Class)class{
    const char *className = class_getName(class);
    return [NSString  stringWithUTF8String:className];
    
}

/**
 获取成员变量

 @param class <#class description#>
 @return <#return value description#>
 */
+ (NSArray*)fetchIvaList:(Class)class{
    unsigned int count = 0;
    Ivar *ivarList = class_copyIvarList(class, &count);
    NSMutableArray *mutaList = [[NSMutableArray alloc]initWithCapacity:count];
    for (unsigned  int i=0; i<count; i++) {
        NSMutableDictionary *dic = [NSMutableDictionary  dictionaryWithCapacity:2];
        const char*ivarName = ivar_getName(ivarList[i]);
        const char*ivarType = ivar_getTypeEncoding(ivarList[i]);
        dic[@"type"] = [NSString stringWithUTF8String:ivarType];
        dic[@"ivarName"] = [NSString stringWithUTF8String:ivarName];
        [mutaList addObject:dic];
    }
    free(ivarList);
    return [NSArray arrayWithArray:mutaList];
    
/**
 获取类的属性

 @param NSArray <#NSArray description#>
 @return <#return value description#>
 */
}
+ (NSArray*)fetchPropertyList:(Class)class{
    unsigned int count =0;
    objc_property_t*propertyList = class_copyPropertyList(class, &count);
    NSMutableArray *mutableList = [[NSMutableArray  alloc]initWithCapacity:count];
    for (unsigned int i=0; i<count; i++) {
        const char*propertyName = property_getName(propertyList[i]);
        [mutableList   addObject:[NSString  stringWithUTF8String:propertyName]];
        
    }
    free(propertyList);
    return [NSArray  arrayWithArray:mutableList];
    
}

/**
 类的实例方法

 @param class <#class description#>
 @return <#return value description#>
 */
+ (NSArray*)fetchMethodList:(Class)class{
    unsigned int count = 0;
    Method *methodList = class_copyMethodList(class, &count);
    NSMutableArray *mutableList = [NSMutableArray  arrayWithCapacity:count];
    for (unsigned int i=0; i<count; i++) {
        Method method = methodList[i];
        SEL methodName = method_getName(method);
        [mutableList  addObject:NSStringFromSelector(methodName)];
        
    }
    free(methodList);
    return [NSArray  arrayWithArray:mutableList];
}