nsjsonserialization

问题 At the moment in order to use this function I'm "converting" my object into a dictionary. i.e. the property names become the keys and the property values become the values. Is there a way to properly do this so that an object will work with this function? i.e. similar to encodeWithCoder and initWithCoder for use with NSUserDefaults . I'd like to do ... NSData *data = [NSJSONSerialization dataWithJSONObject:myObject options:0 error:nil]; at the moment I do something like... NSData *data =

问题 I make a get from my server and I get a valid response: - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Append the new data to the instance variable you declared //[_responseData appendData:data]; NSString *responseBody = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"%@",responseBody); if(data != NULL) { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, (unsigned long)NULL), ^(void) { NSError *error =

问题 I was trying to parse a JSON string from USGS. However I get error "-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x68a34c0" Basically, I would like to parse the USGS JSON into the tableview. Can anyone help? Here are my codes. ViewController.h @interface EarthquakeViewController : UITableViewController { NSArray *json; NSDictionary *earthquakeReport; } ViewController.m - (void)viewDidLoad { //content = [NSMutableArray arrayWithObjects:@"one", @"two", nil]; [super

问题 I have seen almost all the posts about NSURL on this site, and I am still stuck. I am using Xcode 4.5. I am trying to download images and display them in a UIScrollView. I want to download asynchronously download images using URLs, that get stored in an array populated using JSON. I get the URLs from a JSON grab off of my database. That works quite well and I can see the URL's being placed into the urlArray, but making the URLConnection to get the image, seems to fail. I can't get any of the

问题 I'm getting this error while parsing JSON: NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error]; Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Unable to convert data to string around character 73053.) UserInfo=0x1d5d8250 {NSDebugDescription=Unable to convert data to string around character 73053.} Any suggestions how to fix this? ADDED As it says in error report, the

问题 I have a classes that looks like this: class Foo { var bar = Int() } class Bar { var baz = String() var arr = [Foo]() } and I have an object of Bar structure that I need to serialize to JSON: let instance = Bar() What is the more elegant way to do it via standard library or some third-party libraries? Thanks in advance. 回答1: I suggest taking this approach: class Foo { var bar = Int() } class Bar { var baz = String() var arr = [Foo]() var jsonDictionary: NSDictionary { return [ "baz" : self

问题 Here is my code: In my .m NSArray *keys = [NSArray arrayWithObjects:@"Training_Code", @"Training_Duration",@"Training_Startdate",@"Training_Enddate",@"Trainer_ID",@"Training_Location",@"Comments",@"Keyword",@"NumberofDays", nil]; NSArray *objects = [NSArray arrayWithObjects:@"Training_Code", @"Training_Duration",@"Training_Startdate",@"Training_Enddate",@"Trainer_ID",@"Training_Location",@"Comments",@"Keyword",@"NumberofDays", nil]; NSData *jsonData; NSString *jsonString; NSDictionary

问题 i want to convert NSDictionary to json string.everything is working fine, i have a small issue that is described as follows: I have a following code for conversion of NSDictionary to NSString: -(NSString *)dictToJson:(NSDictionary *)dict { NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil]; return [[NSString alloc] initWithBytes:[jsonData bytes] length:[jsonData length] encoding:NSUTF8StringEncoding]; } I am calling the method as:

问题 I have a WebService, which give me the fallowing Json-String back: "{\"password\" : \"1234\", \"user\" : \"andreas\"}" I call the webservice and try to parse the returned data like: [NSURLConnection sendAsynchronousRequest: request queue: queue completionHandler: ^(NSURLResponse *response, NSData *data, NSError *error) { if (error || !data) { // Handle the error } else { // Handle the success NSError *errorJson = nil; NSDictionary *responseDict = [NSJSONSerialization JSONObjectWithData: data

问题 NSData* jsonDataToSendTheServer; NSDictionary *setUser = [NSDictionary dictionaryWithObjectsAndKeys:[@"u" stringByAppendingString:my.id],@"id", @"GET_USER_INFO",@"command", @"",@"value", nil]; NSLog(@"%@", jsonDataToSendTheServer); Here is my code. When I run above code I get this print <7b226964 223a2275 35383738 37373334 31222c22 636f6d6d 616e6422 3a224745 545f5553 45525f49 4e464f22 2c227661 6c756522 3a22227d> I don't have any idea whether I can created a json or not. How can I fix this?