NSURLConnection with blocks - nsurlconnection

Question

I'm using
[NSURLConnection connectionWithRequest:req delegate:self];
and then I use
-(BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace;
-(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error;
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;
-(void)connectionDidFinishLoading:(NSURLConnection *)connection;
to handle data loading. Everything is ok and working fine but I don't like the beauty of this code )
I wish to use blocks, to make my code looks like this:
[myConnection sendData:data
successBlock:^(void){NSLog(#"success");}
errorBlock:^(NSError * error){NSLog(#"error.description: %#", error.description);}];
is it possible to use NSURLConnection with blocks?

Answer 1

I use this class:
The MyConnection.h
#import <Foundation/Foundation.h>
#interface MyConnection : NSObject <NSURLConnectionDelegate, NSURLConnectionDataDelegate> {
NSURLConnection * internalConnection;
NSMutableData * container;
}
-(id)initWithRequest:(NSURLRequest *)req;
#property (nonatomic,copy)NSURLConnection * internalConnection;
#property (nonatomic,copy)NSURLRequest *request;
#property (nonatomic,copy)void (^completitionBlock) (id obj, NSError * err);
-(void)start;
#end
And the MyConnection.m
#import "MyConnection.h"
static NSMutableArray *sharedConnectionList = nil;
#implementation MyConnection
#synthesize request,completitionBlock,internalConnection;
-(id)initWithRequest:(NSURLRequest *)req {
self = [super init];
if (self) {
[self setRequest:req];
}
return self;
}
-(void)start {
container = [[NSMutableData alloc]init];
internalConnection = [[NSURLConnection alloc]initWithRequest:[self request] delegate:self startImmediately:YES];
if(!sharedConnectionList)
sharedConnectionList = [[NSMutableArray alloc] init];
[sharedConnectionList addObject:self];
}
#pragma mark NSURLConnectionDelegate methods
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[container appendData:data];
}
//If finish, return the data and the error nil
-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
if([self completitionBlock])
[self completitionBlock](container,nil);
[sharedConnectionList removeObject:self];
}
//If fail, return nil and an error
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
if([self completitionBlock])
[self completitionBlock](nil,error);
[sharedConnectionList removeObject:self];
}
#end
to use it:
MyConnection * connection = [[MyConnection alloc]initWithRequest:req];
[connection setCompletitionBlock:^(id obj, NSError *err) {
if (!err) {
//It's ok, do domething with the response data (obj)
} else {
//There was an error
}
}];
[connection start];
It's based on the code, The Big Nerd Ranch uses on his book.

Answer 2

I hope it will be helpful.
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
NSLog(#"%#", response);
NSLog(#"%#", data);
}];