I need to convert data received from the web via an array in a PHP script into an array that I can pull values out of. Here's my code!
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
//NSString *payloadAsString = [NSString stringWithUTF8String:[receivedData bytes]];
NSArray *payloadAsString = [NSKeyedUnarchiver unarchiveObjectWithData:receivedData];
[payloadAsString finishEncoding];
verified = [payloadAsString objectAtIndex:0];
NSLog(#"logging");
//NSString *no = [[NSString alloc] init stringWithCString:verified];
NSLog(#"%#", verified);
if([verified isEqualToString:#"admin"]){
NSLog(#"test admin");
[self performSelector:#selector(changeViewAdmin) withObject:nil afterDelay:0.05];
}
if([verified isEqualToString:#"user"]){
NSLog(#"test user");
[self performSelector:#selector(changeView) withObject:nil afterDelay:0.05];
}
if([verified isEqualToString:#"No"]){
NSLog(#"test no");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error"
message:#"Invalid UserName/Password combination!"
delegate:self
cancelButtonTitle:#"Okay"
otherButtonTitles:nil];
[alert show];
[alert release];
}
[payloadAsString release];
//NSLog(#"%#", verified);
// INSERT GOOGLE MAPS URL REQUEST HERE
/*if(requestType == 1){
NSString* addressText = payloadAsString;
// URL encode the spaces
addressText = [addressText stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding];
NSString* urlText = [NSString stringWithFormat:#"http://maps.google.com/maps?q=%#", addressText];
// lets throw this text on the log so we can view the url in the event we have an issue
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlText]];
// */
//
//}
[connection release];
self.receivedData = nil;
}
Unfortunately, my console returns null and asks if I've put the -finishencoding method in. Question is, if that's correct, where would I do so?
PS: Another question, is if I'm retrieving an array of data from a database, is a PHP script the best way to go? Thank you.
1) Of all this code the only string relevant to your question is
NSArray *payloadAsString = [NSKeyedUnarchiver unarchiveObjectWithData:receivedData];
I really doubt that PHP script returns you data in NSKeyedUnarchiver-compatible format. I believe the only reason you don't get NSInvalidArgumentException exception from this method is that receivedData is nil (did you initialize it anywhere?). Try to make a string from what you receive like this
[[[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding] autorelease]
and log it. From this I hope it will be clear how to parse response.
2) Do not name NSArray instances like 'blahBlahString'. Strings and arrays are completely different.
NSKeyedUnarchiver can only unarchive instances which are produced by instances of the NSKeyedArchiver class.
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSKeyedUnarchiver_Class/index.html
Related
I tried to post from twitter but it not posting the comments. It display an error 204 , in the facebook the same data is successfully posted but in the twitter i got an error can any one have an idea How to solve it
-(void)postDataOnTwitterMethod{
if ([[FHSTwitterEngine sharedEngine]isAuthorized]) {
NSData *dataFromPath = UIImageJPEGRepresentation(cameraImage,1.0);
number = (arc4random()%10000)+1; //Generates Number from 1 to 10000.
RndNo = [NSString stringWithFormat:#"%i", number];
NSLog(#" ITEM %#",RndNo);
NSString *avalabelDate = [NSString stringWithFormat:#"%#_%#",[CommonMethods getCurrentDateAndTime],self.AvailableTillTextField.text];
NSString *theWholeString = [NSString stringWithFormat:#"Item No: %#\nItemName: %#\nItemCost: %#\nAvailableTill: %#\nCategory: %#\nDescription: %#",RndNo,self.NameTextField.text,self.PriceTextField.text,avalabelDate,self.ListTypeTextField.text,self.DecTextView.text];
dispatch_async(GCDBackgroundThread, ^{
#autoreleasepool {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSError *returnCode = [[FHSTwitterEngine sharedEngine]postTweet:theWholeString withImageData:dataFromPath];
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
NSString *title = nil;
NSString *message = nil;
if (returnCode) {
title = [NSString stringWithFormat:#"Error %d",returnCode.code];
message = returnCode.localizedDescription;
} else {
title = #"Tweet Posted";
}
dispatch_sync(GCDMainThread, ^{
#autoreleasepool {
UIAlertView *av = [[UIAlertView alloc]initWithTitle:title message:message delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[av show];
}
});
}
});
}
else{
[[FHSTwitterEngine sharedEngine]showOAuthLoginControllerFromViewController:self withCompletion:^(BOOL success) {
NSLog(success?#"L0L success":#"O noes!!! Loggen faylur!!!");
}];
}
}
Your comments made me smile.
I believe it's an HTML error. It means the data was received and understood but you shouldn't expect a return. In other words, it's void. At least that's what I can see with a quick look around your code and my minimal understanding of Twitter API.
Now i am able to send the String but cant able to send the Image using this method
NSError *returnCode = [[FHSTwitterEngine sharedEngine]postTweet:theWholeString withImageData:imageData];
FHSTwitterEngine has some known bugs, and the problem is now fixed, see below:
Getting error while posting image using FHSTwitterEngine
compress the existing image with this code and you will get images posted.
NSData *data = UIImageJPEGRepresentation(imageView.image, 0.6);
I'm planning updates for an enterprise app with ad-hoc distribution.
For updates, Apple recommends having the user visit an HTML page and tap on a link:
href="itms-services://?action=download-manifest&url=http://example.com/
manifest.plist"
See http://help.apple.com/iosdeployment-apps/#app43ad871e
I don't want to do this. I want the app to programmatically check for updates on launch and alert the user with a UIAlertView that an update is available.
Here's what I have so far in application didFinishLaunching. The complicated plist parsing comes from the structure of an example plist found here: http://help.apple.com/iosdeployment-apps/#app43ad78b3
NSLog(#"checking for update");
NSData *plistData = [NSData dataWithContentsOfURL:[NSURL URLWithString:#"http://example.com/MyApp.plist"]];
if (plistData) {
NSLog(#"finished checking for update");
NSError *error;
NSPropertyListFormat format;
NSDictionary *plist = [NSPropertyListSerialization propertyListWithData:plistData options:NSPropertyListImmutable format:&format error:&error];
if (plist) {
NSArray *items = [plist valueForKey:#"items"];
NSDictionary *dictionary;
if ([items count] > 0) {
dictionary = [items objectAtIndex:0];
}
NSDictionary *metaData = [dictionary objectForKey:#"metadata"];
float currentVersion = [[[[NSBundle mainBundle] infoDictionary] objectForKey:#"CFBundleVersion"] floatValue];
float newVersion = [[metaData objectForKey:#"bundle-version"] floatValue];
NSLog(#"newVersion: %f, currentVersion: %f", newVersion, currentVersion);
if (newVersion > currentVersion) {
NSLog(#"A new update is available");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Update available" message:#"A new update is available." delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"UPDATE", nil];
[alert show];
}
}
}
Then I have my UIAlertView delegate method:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1) {
NSLog(#"downloading full update");
UIWebView *webView = [[UIWebView alloc] init];
[webView loadRequest:[[NSURLRequest alloc] initWithURL:[NSURL URLWithString:#"itms-services://?action=download-manifest&url=http://example.com/MyApp.plist"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10.0]];
}
}
A few things:
I know [alert show] shouldn't be called in application didFinish, but I'll change it later.
I don't know how quickly plistData will be downloaded and how this download affects the app.
More importantly, my alert view delegate method doesn't work, and the update doesn't download. Even when I introduce webView with #property (nonatomic, strong) UIWebView *webView, the method doesn't do anything.
I think Dropbox has the MIME configured properly because I can download the .ipa through google Chrome.
So what I really need is a way using NSURLConnection (NSURLRequest etc.) to replicate the act of a user tapping on an HTML href. After that I think the full update will occur.
You can open a URL automatically using
[[UIApplication sharedApplication] openURL:...];
I don't know if it works for itms-services: urls, but it works for other bespoke URL schemes like tel:, fb: etc. so it should do unless Apple have specifically blocked it.
I want to fetch JSON data asynchronously. The data is set up in a way that one request will bring only 8 records. I need to send the requests repeatedly until the response becomes empty or returns less than 8 records.
Currently, I have these methods in myviewcontroller.m class:
(void)myCallback:(id)sender {
MyDataRequest *objMyDataRequest = [[[MyDataRequest alloc] init] autorelease];
objMyDataRequest.myRequiredVariableToGetAuthTokenDataResponse = classOfMyCallBack.someVariable;
// Initiate getAuthToken request
[objWishListRequest initiateGetAuthTokenRequest:self requestSelector:#selector(getAuthTokenDataResponse:)];
}
Now here is the definition of getAuthTokenDataResponse:
(void) getAuthTokenDataResponse:(NSData *)data {
NSString *stringResponse = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
SBJsonParser *parser=[[SBJsonParser alloc]init];
NSDictionary *objDictionaryForStringResponse = [parser objectWithString:stringResponse];
[stringResponse release];
[parser release];
MyListRequest *objMyListRequest = [[[MyListRequest alloc] init] autorelease];
objMyListRequest.myRequiredValueToGetMyDataResponse = [objDictionaryForStringResponse objectForKey:#"Data"];
// Initiate GetMyDataResponse request
[objMyListRequest initiateGetMyDataRequest:self requestSelector:#selector(getMyDataResponse:)];
}
(void) getMyDataResponse:(NSData *)data {
NSString *stringResponse = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
SBJsonParser *parser=[[SBJsonParser alloc]init];
NSDictionary *objGetMyDataRootDictionary = [parser objectWithString:stringResponse];
[stringResponse release];
[parser release];
NSDictionary *dataElements=[objGetMyDataRootDictionary objectForKey:#"Data"];
Wish *objMyData;
for (NSDictionary* objGetMyDataRootDictionary in dataElements) {
objMyData = [[Wish alloc]init];
//add different elements from dataElements into member variables of object objWish
[self.myDataArray addObject:objMyData];
[objMyData release];
}
[self.myDataTableView reloadData];
}
This method lies in MyDataRequest class:
(void)initiateGetMyDataRequest:(id)requestDelegate requestSelector:(SEL)requestSelector{
// Set the delegate and selector
self.delegate = requestDelegate;
self.callback = requestSelector;
NSString* unescapedUrlString = [NSString stringWithFormat:#"http://test.mytesturl.com/core.svc/alldata/My/get/All/?token=%#&search=&page=1",myRequiredtokenparameter];
[self request:url];
}
I need to send multiple requests to the same url (with different parameter value i.e. value of page number) to fetch the results. How may I achieve it given the above scenario? The calls must be asynchronous.
How should I make the actual flow between all these calls? How may I get the data of "all the pages" asynchronously?
I think you are looking for a operation queue. I use ASIHTTPRequests in my apps and they work.
If you want to use this library, here's the link how to use it: Show UIActivityIndicatorView when loading NSString from Web
Guys, I was retrieving an XML response from a .php script on my server using the following code:
NSString *xmlString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString]
encoding:NSUTF8StringEncoding error:&error];
and
//tried also: if(error)
if(!xmlString)
{
NSString * errorString = [NSString stringWithFormat:#"Unable to download xml data (Error code %i )", [error code]];
UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:#"Error loading content" message:errorString delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[errorAlert show];
[errorAlert release];
}
//*** now I have a touchXML xPath query code that extracts what I need from XML
My .php script wasn't working today and my iApp was freezing without any alerts, errors or notifications? I thought that the code above will handle errors but it doesn't???
A) Then what type of error does it catch?
Then I remembered that i I should try working with NSURLConnection and its delegate methods to catch any error that occurs.
//Inside viewDidLoad method
NSMutableData *responseData = [[NSMutableData alloc] init];
NSURL *baseURL = [[NSURL URLWithString:self.chosenDrawRss] retain];
NSURLRequest *request = [NSURLRequest requestWithURL:baseURL];
[[[NSURLConnection alloc] initWithRequest:request delegate:self] autorelease];
NSString *xmlString = [[NSString alloc] initWithData:self.responseData encoding:NSUTF8StringEncoding];
The problem I had using this approach was that app ran the Connection in the background and continued executing the rest of the code found in viewDidLoad, so I had to reorganize my code a bit by moving it to another method that I call from delegate method connectionDidFinishLoading. The problem I have is that my delegate methods are not called. Well, all except didFailWithError: if I try to load URL that doesn't exist.
UPDATE:
delegate methods are called but it takes one minute or so for delegate method to be called and until alert message pops out...
B) Could I use stringWithContentsOfURL and still have an alert to the user if anything happens?
C) If not, then I need help with setting up NSURLConnection approach? I mean, what I'm missing here is why aren't my delegate methods called?
I truly hope my questions make sense :D
L
If your delegate method is called in didFailWithError then i suppose it will even be called in
connectionDidFinishLoading. Check by enabling a breakpoint in the delegate methods and track the flow. It may have happened the function returns before you call the delegate.
NSString *xmlString = [[NSString alloc] initWithData:self.responseData encoding:NSUTF8StringEncoding]
should be called in your delegate connectionDidFinishLoading method and in
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[responseData appendData:data];
}
I dont see why the alert should pop up after a minute unless you are doing some processing before displaying it.
I have follwowing peace of code in which I have specified the leaky line . As I am new to iPhone developement I can't understand what actually is wrong with that line . please have a look at that line and tell me .
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
//take away
//NSURL *url1 = [[NSURL alloc] initWithString:#"http://url/Service.asmx/takeAwayList"];
NSURL *url1 = [[NSURL alloc] initWithString:[NSString stringWithFormat:#"%#/Service.asmx/takeAwayList",serviceURL]];
NSMutableURLRequest* request1=[NSMutableURLRequest requestWithURL:url1];
[request1 setHTTPMethod:#"POST"];
[request1 setTimeoutInterval:10];
//*****the leaky line***********************///
NSData *data2=[[NSURLConnection sendSynchronousRequest:request1 returningResponse:nil error:nil] autorelease];
if(data2 == nil)
{
UIAlertView* alert = [[UIAlertView alloc]initWithTitle:#"Alert" message:#"The network is not available.\n Please check the Internet connection." delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
else
{
NSXMLParser *xmlParser1 = [[NSXMLParser alloc] initWithData:data2];
//Initialize the delegate.
TakeAwayParser *takeAwayParser = [[TakeAwayParser alloc] initTakeAwayParser];
//Set delegate
[xmlParser1 setDelegate:takeAwayParser];
//Start parsing the XML file.
#try {
BOOL success = [xmlParser1 parse];
if(success)
NSLog(#"No Errors");
else
NSLog(#"Error Error Error!!!");
}
#catch (NSException * e) {
NSLog(#"Exception in parsing %# %#",[e name], [e reason]);
}
[takeAwayParser release];
[xmlParser1 release];
}
//[request1 release];
// [response1 release];
//
[url1 release];
// [data2 release];
//new arrivals
//[data2 release];
[pool release];
I had issues with this as well in my Large project. After working with an Apple engineer on trying to locate the leaks, he finally asked the main Apple dev team behind NSURLConnection. They basically said that there is an internal cache that is not clearable at all in NSURLConnection and it was a known issue.
So I set out looking for alternatives. I found ASIHTTPConnection (link below) which works off of CFNetwork. It is designed to be a drop-in replacement for NSURLConnection, plus a bunch of other awesome goodies like downloading to disk instead of memory, download resuming, progress bar callbacks etc..
I have used it in all my projects and have never had any issues or complaints. An, in answer to your question, this is how I got rid of those memory leaks.
http://allseeing-i.com/ASIHTTPRequest/
This line isn't leaking, you shouldn't even being autoreleasing it.
Do yourself a favor and read the Memory Management Guide in Apple's developer docs, commented out releases in your code do not bode well.
EDIT: Hrm I take that back your code is completely fine except for that one line. Are you sure that it's leaking? It's returning an object with a retain count of 0, so you autoreleasing it should be causing trouble because it already has a retain count of 0.