爲什麼在ARC中objc_super.receiver不可用？

Question

如何在下面的第3行修復編譯器錯誤'receiver' is unavailable: this system field has retaining ownership？

UIKIT_STATIC_INLINE void sample_drawRect(id self, SEL _cmd, CGRect rect) { 
    struct objc_super super; 
    super.receiver = self; 
    super.super_class = class_getSuperclass([self class]); 
    objc_msgSendSuper(&super, @selector(drawRect:)); 
} 

Answer 1

使用ARC，C-Structs不能存儲指向Objective-C對象的指針。

您是否嘗試過橋接模型，像這樣？

super.receiver = (__bridge void*)self; 

Answer 2

使用objective-C++代替objective-c（.mm文件）。