怎么样hook方法在方法执行之前修改参数

eleme / Stinger

Stinger is a high-efficiency library with great compatibility, for aop in Objective-C, using libffi instead of Objective-C message forwarding. It is 20+ times faster than the Aspects, from message-sending to Aspect-oriented code ends.

MIT License

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比如:

typedef void(^XXURLRequestCompletionBlock)(NSData *, NSURLResponse *, NSError *);

[NSURLSession st_hookInstanceMethod:@selector(dataTaskWithRequest:completionHandler:) option:STOptionBefore usingIdentifier:@"session_before" withBlock:^(id<StingerParams> params, NSMutableURLRequest *request, XXURLRequestCompletionBlock completionHandler){
}];

我想在NSURLSession的dataTaskWithRequest:completionHandler:方法执行之前修改参数，包括request以及completionHandler的实现，以便于在completionHandler调用的时候执行其他处理；

eleme / Stinger

怎么样hook方法在方法执行之前修改参数 #23