From NSURLConnection to NSURLSession - ios

Question

What is the best way to convert NSURLConnection to NSURLSession ?
error message: (Xcode)
ViewController.m:342:45: 'stringByAddingPercentEscapesUsingEncoding:' is deprecated: first deprecated in iOS 9.0 - Use -stringByAddingPercentEncodingWithAllowedCharacters: instead, which always uses the recommended UTF-8 encoding, and which encodes for a specific URL component or subcomponent since each URL component or subcomponent has different rules for what characters are valid.
my code :
-(void)downloadZip
{
NSLog(#"Start Downloading Zip File");
NSDate *myDate = (NSDate *)[[NSUserDefaults standardUserDefaults] objectForKey:#"LastUpdate"];
NSString *path = [NSString stringWithFormat:phpLinkgetZip, myDate];
NSURL *url = [NSURL URLWithString:[path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSLog(#"Checking update at Zip File : %#", path);
NSLog(#"Checking update Time : %#", myDate);
responseData = [[NSMutableData alloc] init];
NSURLRequest* updateRequest = [NSURLRequest requestWithURL: url];
NSURLConnection* connection = [[NSURLConnection alloc] initWithRequest:updateRequest delegate:self];
[connection start];
NSLog(#"Zip Downloading start...");
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];
filesize = [[NSNumber numberWithLong: [response expectedContentLength] ] retain];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[self updateZipDownloaded];
[filesize release];
[connection release];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[responseData appendData:data];
NSNumber* curLength = [NSNumber numberWithLong:[responseData length] ];
float progress = [curLength floatValue] / [filesize floatValue] ;
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"Zip Downloading error");
}

Answer 1

If you want to overcome above error please use below code
NSCharacterSet *setPath = [NSCharacterSet URLPathAllowedCharacterSet];
NSString *strURL = [path stringByAddingPercentEncodingWithAllowedCharacters:setPath];
stringByAddingPercentEncodingWithAllowedCharacters:
Returns a new string made from the receiver by replacing all
characters not in the specified set with percent-encoded characters.
Characters passed to set below methods
(NSCharacterSet *)URLUserAllowedCharacterSet;
(NSCharacterSet *)URLPasswordAllowedCharacterSet;
(NSCharacterSet *)URLHostAllowedCharacterSet;
(NSCharacterSet *)URLPathAllowedCharacterSet;
(NSCharacterSet *)URLQueryAllowedCharacterSet;
(NSCharacterSet *)URLFragmentAllowedCharacterSet;
If you want to go NSURLSession from NSURLConnetion,do the following things
NSURL *URL = [NSURL URLWithString:#"http://example.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
// ...
}];
[task resume];
NSURLSession class and related classes provide an API for downloading content via HTTP. This API provides a rich set of delegate methods for supporting authentication and gives your app the ability to perform background downloads when your app is not running or, in iOS, while your app is suspended.
To use the NSURLSession API, your app creates a series of sessions,
each of which coordinates a group of related data transfer tasks. For
example, if you are writing a web browser, your app might create one
session per tab or window. Within each session, your app adds a series
of tasks, each of which represents a request for a specific URL (and
for any follow-on URLs if the original URL returned an HTTP redirect).
Like most networking APIs, the NSURLSession API is highly
asynchronous. If you use the default, system-provided delegate, you
must provide a completion handler block that returns data to your app
when a transfer finishes successfully or with an error. Alternatively,
if you provide your own custom delegate objects, the task objects call
those delegates’ methods with data as it is received from the server
(or, for file downloads, when the transfer is complete).