runtime的我的簡單封裝

Runtime是想要作好iOS開發，或者說是真正的深入的掌握OC這門語言所必需理解的東西。最近在學習Runtime，有本身的一些心得，整理以下，

一爲 查閱方便

二爲 或許能給他人一些啓發，

三爲 但願獲得你們對這篇整理不足之處的一些指點。

什麼是Runtime

咱們寫的代碼在程序運行過程當中都會被轉化成runtime的C代碼執行，例如[target doSomething];會被轉化成objc_msgSend(target, @selector(doSomething));。

OC中一切都被設計成了對象，咱們都知道一個類被初始化成一個實例，這個實例是一個對象。實際上一個類本質上也是一個對象，在runtime中用結構體表示。

 可是單純的去調用又顯得很麻煩，全部就本身簡單的封裝了幾個方法，能夠和你們一塊兒交流學習

/**
 獲取類名

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

/**
 獲取成員變量

 @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];
    
/**
 獲取類的屬性

 @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];
    
}

/**
 類的實例方法

 @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];
}