ios - 如何在 iOS 上调配类方法？

Question

Method swizzling 非常适合实例方法。现在，我需要调配一个类方法。知道怎么做吗？

试过这个但它不起作用:

void SwizzleClassMethod(Class c, SEL orig, SEL new) {

Method origMethod = class_getClassMethod(c, orig);
Method newMethod = class_getClassMethod(c, new);

if(class_addMethod(c, orig, method_getImplementation(newMethod), method_getTypeEncoding(newMethod)))
    class_replaceMethod(c, new, method_getImplementation(origMethod), method_getTypeEncoding(origMethod));
else
    method_exchangeImplementations(origMethod, newMethod);
}

Answer 1

事实证明，我并不遥远。这个实现对我有用:

void SwizzleClassMethod(Class c, SEL orig, SEL new) {

    Method origMethod = class_getClassMethod(c, orig);
    Method newMethod = class_getClassMethod(c, new);

    c = object_getClass((id)c);

    if(class_addMethod(c, orig, method_getImplementation(newMethod), method_getTypeEncoding(newMethod)))
        class_replaceMethod(c, new, method_getImplementation(origMethod), method_getTypeEncoding(origMethod));
    else
        method_exchangeImplementations(origMethod, newMethod);
}