nsdata

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { response=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];} Here, I get the response in the "response value" --> [{"response":true,"danger":false}] The thing is: How can I rescue the "danger"(true/false) into a new variable to use it in other methods? I need to know if "danger" is true or false becouse if its true, i have to show an alert. I would really appreciate someone help, as I am stuck in here. use NSJSONSerialization: http://developer.apple.com/library/ios/#documentation/Foundation

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!! Use +[NSPropertyListSerialization dataWithPropertyList:format:options:error:] to convert the data, then check if the result -isKindOfClass:[NSArray class] . Use NSKeyedArchiver for archiving object to data. NSKeyedUnarchiver for unarchiving object from data: NSArray *object = [NSKeyedUnarchiver

I am writing a Mac app based on an iOS app. The code below converts a UIImage to NSData to upload to Parse.com. I would like to do the same for Mac but I do not seem to be able to convert it to NSData. What should I be doing? Thanks var image = UIImage(named: "SmudgeInc") let imageData = UIImagePNGRepresentation(image) let imageFile = PFFile(name:"image.png", data:imageData) You can use the NSImage property TIFFRepresentation to convert your NSImage to NSData : let myImageData = yourImage.TIFFRepresentation! If you need to save your image data to a PNG file you can use NSBitmapImageRep(data:)

In my app, user can select a pic from album or camera where i can get uiimage representation. Since the album may have pic from web, the file type is not only jpg. Then i need to sent it to the server without convertion. Here i can only use nsdata. I know UIImageJPEGRepresentation and UIImagePNGRepresentation, but i think this two method may convert the original image. Maybe when quality set to 1 UIImageJPEGRepresentation can get original pic? Is there any method to get the original uiimage nsdata? You can use the ALAssetsLibrary and ALAssetRepresentation to get the original data. Example: -

How is it possible to get a base64 string from an NSData instance? Saurabh please try to search before posting questions I already post a answer for this here - Verifying a Receipt with the App Store - try this function there. Yang (if you targeting on IOS 7 ...) There is an easy way using provided API: https://stackoverflow.com/a/19088341/2481444 I also tested the accepted code. They both generate the same result. It also has decoding function. @S.J NSString* base64String = [nsdata base64Encoding]; 来源： https://stackoverflow.com/questions/6006823/creating-a-base-64-string-from-nsdata

I am writing a .jpg file to my app's Documents directory like this: NSData *img = UIImageJPEGRepresentation(myUIImage, 1.0); BOOL retValue = [img writeToFile:myFilePath atomically:YES]; Later, I load that image back into a UIImage using: UIImage *myImage = [UIImage imageWithContentsOfFile:path]; I know it works because I can draw the image in a table cell and it is fine. Now if I try to use UIImageJPEGRepresentation(myImage, 1.0), the debugger prints out these lines: <Error>: Not a JPEG file: starts with 0xff 0xd9 <Error>: Application transferred too few scanlines And the function returns nil.

I'm working on an app where you can send either a text, image or a contact over Multipeer Connectivity to another device. It will then save in the second device's Core Data. What I do is send the data over as an NSDictionary and convert it back again. So I am left with an NSDictionary on the receiving device. How then, can I save the object for the key of @"objectData" to Core Data? I'd like it to work with NSString, UIImage & ABPerson. // Create a new object in the managed object context. Received *receivedData = [NSEntityDescription insertNewObjectForEntityForName:@"Received"

Now I know that xCode automaticly does the GZip decrompession for you within: NSData *data = [NSData dataWithContentsOfURL:URL]; And it does work if I point to a Gzip file on my server. But since my content is dynamic, I have a PHP script that rather then create a gzip file like so: $zp = gzopen($file, "r"); $data = gzread($zp, $filesize); gzclose($zp); I encode my own data with: echo gzencode($data, 9); With this I add the following headers: header("Content-Type: application/x-gzip"); header("Content-Encoding: gzip"); header("Accepts-Encoding: gzip"); When I browse to the URL, my browser