nsurlconnection

Are there complete examples that make use of all the NSURLConnection delegate methods?

由 北城余情 提交于 2019-11-27 12:57:36
I have a hard time to find any examples for NSURLConnection delegate method implemenetations. The SeismicXML example from apple is incomplete. For instance, they don't incorporate -connection:willSendRequest:redirectResponse: Maybe there's a good text out there. I went already through all the Apple material regarding this. Here's an implementation I've been working with lately: .h: NSMutableData *responseData; .m: - (void)load { NSURL *myURL = [NSURL URLWithString:@""]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData

Asynchronous NSURLConnection with NSOperation

由 我怕爱的太早我们不能终老 提交于 2019-11-27 12:29:09
I want to do NSURLConnection in background mode,because it response is having much data.Forums are telling to use Apple's finite length coding to use in didEnterBackground . but I want to avoid it.instead of it I use following code through NSOperation with NSInvocation as, but it is not working. connectToServer is having NSURLConnection operation.any help please? didReceiveData , didReceiveResponse delegate methods are not called? NSOperationQueue *queue = [NSOperationQueue new]; NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector

Check if NSURL returns 404

由 半腔热情 提交于 2019-11-27 11:57:24
I need to check whether a URL (represented by a NSURL) is available or returns 404. What is the best way to achieve that? I would prefer a way to check this without a delegate, if possible. I need to block the program execution until I know if the URL is reachable or not. Jirapong As you may know already that general error can capture by didFailWithError method: - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription], [[error userInfo] objectForKey:NSErrorFailingURLStringKey]); } but for 404

What is the biggest difference between NSURLConnection and NSURLSession

由 隐身守侯 提交于 2019-11-27 11:56:45
NSURLSession is new network SDK than NSURLConnection from Apple. 3rd old choice is CFNetwork. Question here is to figure out the biggest difference between them to understand why Apple is evolving like these. Thanks The entire model is different. NSURLSession is designed around the assumption that you'll have a lot of requests that need similar configuration (standard sets of headers, etc.), and makes life much easier if you do. NSURLSession also provides support for background downloads, which make it possible to continue downloading resources while your app isn't running (or when it is in

Getting Image from URL/server [duplicate]

由 雨燕双飞 提交于 2019-11-27 11:22:46
问题 This question already has answers here : iOS download and save image inside app (11 answers) Closed 5 years ago . I'm fairly new to iPhone development and trying to fetch 'Images from Server' in my application. I'm using the following method to do this: - (UIImage *)imageFromURLString:(NSString *)urlString { NSURL *url = [NSURL URLWithString:urlString]; NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url]; [request setHTTPMethod:@"GET"]; NSURLResponse *response = nil;

NSURLConnection leak?

由 左心房为你撑大大i 提交于 2019-11-27 11:22:20
问题 i have set up a nsurl which grabs the data from http. when i run instrument, it says i have a leak NSFNetwork object. and how do i release theConnection in (void)ButtonClicked? or it will be release later on? - (void)ButtonClicked { NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:KmlUrl] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:20.0f]; NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if

Downloading a file from url and saving to resources on iPhone

由 北城余情 提交于 2019-11-27 11:21:22
问题 Is it possible to download a file (i.e. an sqlite database file) from the Internet into your iPhone application programmatically for later use within the application? I am trying using NSURLConnection , but not able to save the file. Here is the example code I am trying: - (void)viewDidLoad { [super viewDidLoad]; NSString *file = [NSString stringWithFormat:@"http://en.wikipedia.org/wiki/Text_file"]; NSURL *fileURL = [NSURL URLWithString:file]; NSURLRequest *req = [NSURLRequest requestWithURL

How to find size of a file before downloading it in iOS 7?

由 房东的猫 提交于 2019-11-27 09:34:09
Wanted to find size of a file on some server before downloading it in iOS 7... I have a method of NSURLConnectionDelegate but it is deprecated after iOS 4.3 Here was that method: - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response You should instead use the NSURLConnectionDataDelegate Note : DATADelegate and its didReceiveResponse: method to send a HEAD request to get just the header: - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response; Then you can get the response size with @Port's suggestion: long long size

Why do I get this error when I try to pass a parameter in NSURL in iOS app?

由 那年仲夏 提交于 2019-11-27 08:48:42
问题 This is what I have in a public method - (IBAction)methodName NSString *quoteNumber = [[self textBox] text]; NSURL *url = [[NSURL alloc] initWithString:@"http://TestSite.com/virdirectory/Webservice1/Service1.asmx/GetQuote?number=%d", quoteNumber]; The error I get is: Too many arguments to method call, expected 1, have 2 What am I doing wrong? 回答1: The initWithString method can only accept a normal NSString, you are passing it a formatted NSString, Take a look at this code: NSURL *url = [

Need to convert NSData to NSArray

由 大城市里の小女人 提交于 2019-11-27 08:15:26
问题 I am pulling down a plist from a URL using an NSURLConnection, which returns an NSData object. I would like to convert this to an NSArray. Can anyone help me? I am refactoring a method that currently does a synchronous request to the URL, using arrayWithContentsOfURL: to get the NSArray. Thanks!! 回答1: Use +[NSPropertyListSerialization dataWithPropertyList:format:options:error:] to convert the data, then check if the result -isKindOfClass:[NSArray class] . 回答2: Use NSKeyedArchiver for
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