iOS method reuse (pass parameters) - ios

Question

I have an url request method, because each page will be used, I want to make it public.
（Poor standard of English, forgive me）
here is my class method:
- (void)httpRequest :(NSString *)url :(NSMutableArray *)array;
{
NSURL *myUrl = [NSURL URLWithString:url];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:myUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSLog(#"请求完成");
NSArray *arr;
arr = [NSJSerialization JSONObjectWithData:operation.responseData options:NSJSONReadingAllowFragments error:NULL];
[array addObjectsFromArray:arr];
？？？？？？？
}failure:^(AFHTTPRequestOperation *operation, NSError *error){
NSLog(#"请求失败: %#", error);
？？？？？？
}];
[operation start];
}
I know how to pass simple parameters,like array and url.But when I use this method,code in the question mark will be different everytime.What can I do to make it can be passed,like parameters.
Like: [myApple httpRequest :myurl :myarray : (susucess .....) : (failure......)];
the question mark can be filled in: mytableView reloadData or nslog...
I'm not sure if i explained my question clearly,i don't know if block can solve this,thanks,waiting for your help.

Answer 1

Firstly, note that all method parameters in Objective-C should be named. So instead of - (void)httpRequest :(NSString *)url :(NSMutableArray *)array;, you should have something like:
- (void)performHttpRequestWithURL:(NSString *)url resultsArray:(NSMutableArray *)array;
To answer your question, you could pass your own completion block into your method. You can then call this block once AFNetworking has completed its HTTP request.
- (void)performHTTPRequestWithURL:(NSString *)urlString completion:(void (^)(NSArray *results, NSError *error))completion
{
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:10];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSLog(#"请求完成");
NSArray *results = [NSJSerialization JSONObjectWithData:operation.responseData options:NSJSONReadingAllowFragments error:nil];
if (completion)
completion(results, nil);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"请求失败: %#", error);
if (completion)
completion(nil, error);
}];
[operation start];
}
You could then call your method and pass in a block:
[self performHTTPRequestWithURL:#"http://www.example.com" completion:^(NSArray *results, NSError *error) {
if (error)
{
// handle error
}
else
{
// reload tableview or similar
}
}];
Take a look at Apple's Blocks Programming Guide for more information on blocks.