为什么ARC中的objc_super.receiver不可用？

Question

如何修复下面第3行中的编译器错误'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无法存储指向Objective-C对象的指针。

你有没有尝试过像这样的桥接演员？

super.receiver = (__bridge void*)self;

Answer 2

使用objective-c ++而不是objective-c（.mm文件）。