how to hooking a class method？

[sayHelloox]

I find some answer like #20 #27, but I found those can not work, do someone have other solution, thanks!

[Assuner]

id object = object_getClass(obj);
[object aspect_...]

[sayHelloox]

can not work for me , What am wrong with me?

id object = object_getClass([TestObject new]);

[object aspect_hookSelector:@selector(testClassMethod) withOptions:AspectPositionAfter usingBlock:^(id<AspectInfo> info){
    NSLog(@"Class method ------ hook");

} error:NULL];

//then call method
[TestObject testClassMethod];

// No log "Class method ------ hook" print

[Assuner]

id class = object_getClass(obj);
id metaClass = object_getClass(class);
[metaClass aspect_...]

[杨阳]

1. import <objc/runtime.h>

2. fetch MetaClass Object

Class settingsMetal = objc_getMetaClass(NSStringFromClass(Settings.class).UTF8String);

3. hook with the MetaClass Object

   NSError *error = nil;
   [settingsMetal aspect_hookSelector:@selector(hello:) withOptions:AspectPositionBefore usingBlock:^(id info, NSString *hello){

   } error:&error];
   NSLog(@"error %@", error);

Hope this help you ！