im trying to get the same value on xmlDictionary and dicionarioXML but, my dicionarioXML its allway (null), any help?
#synthesize xmlDictionary;
-(NSString*)buscaDados:(NSData*) dados
{
NSString * responseContent = [[NSString alloc] initWithBytes:[dados bytes] length:[dados length] encoding:NSUTF8StringEncoding];
NSError *parseError = nil;
xmlDictionary = [XMLReader dictionaryForXMLString:responseContent error:&parseError];
[responseContent release];
NSString* sucesso=[xmlDictionary valueForKeyPath:#"receitas.total.text"];
NSLog(#"xmlDictionary: %#",xmlDictionary);
return sucesso;
}
-(NSDictionary*)trataDados
{
NSDictionary* dicionarioXML = [self xmlDictionary];
NSLog(#"dicionarioXML: %#",dicionarioXML);
return dicionarioXML;
}
Null means something doesn't exist. What error are you getting back?
NSLog(#"Error: %#", parseError);
Related
macOS 12.2.1
Xcode 13.3
I'm a beginner in Objective-C. When I try to create a local notification, I save an object of a custom class to the userInfo property of NSUserNotification, but the userInfo seems to be assigned to a nil value.
I will provide a simple code below to demonstrate this.
#import <Cocoa/Cocoa.h>
#interface MyData : NSObject<NSSecureCoding>
#end
#implementation MyData{
double data;
}
-(instancetype)initWithData:(double)data{
[super init];
self->data = data;
return self;
}
+(BOOL)supportsSecureCoding{
return YES;
}
-(void)encodeWithCoder:(nonnull NSCoder *)coder {
[coder encodeDouble:data forKey:#"data"];
}
-(nullable instancetype)initWithCoder:(nonnull NSCoder *)coder {
if (self = [super init]){
self->data = [coder decodeDoubleForKey:#"data"];
}
return self;
}
#end
int main(int argc, const char * argv[]) {
NSUserNotification* n = [NSUserNotification new];
MyData* myData = [[MyData alloc] initWithData: 1.0];
n.userInfo = #{#"MyData":myData};
assert(n.userInfo == nil);// nil userInfo
n.userInfo = #{#"MyData":#"Other"};
assert(n.userInfo != nil);// but not nil here.
return 0;
}
// Why? How can I pass my custom object?
Let's see the documentation of userInfo:
All items must be property list types or an exception is thrown.
Does MyData is one of the property list types? No. The allowed types are listed here.
Now, let's do some test:
NSUserNotification* n = [NSUserNotification new];
NSString *errorDescription = nil;
MyData* myData = [[MyData alloc] initWithData: 1.0];
// String: String
NSDictionary *basicDict = #{#"MyData": #"Other"};
n.userInfo = basicDict;
NSLog(#"UserInfo Basic: %#", n.userInfo);
id plistStrTest = [NSPropertyListSerialization dataFromPropertyList:basicDict
format:NSPropertyListXMLFormat_v1_0
errorDescription:&errorDescription];
if (errorDescription) {
NSLog(#"Error while serializing: %#", errorDescription);
}
NSLog(#"Plist Basic: %#", [[NSString alloc] initWithData:plistStrTest encoding:NSUTF8StringEncoding]);
// String: MyData
NSDictionary *rawDataDict = #{#"MyData": myData};
n.userInfo = rawDataDict;
NSLog(#"UserInfo Data: %#", n.userInfo);
errorDescription = nil;
id plistRawData = [NSPropertyListSerialization dataFromPropertyList:rawDataDict
format:NSPropertyListXMLFormat_v1_0
errorDescription:&errorDescription];
if (errorDescription) {
NSLog(#"Error while serializing: %#", errorDescription);
}
NSLog(#"Plist Raw: %#", [[NSString alloc] initWithData:plistRawData encoding:NSUTF8StringEncoding]);
NSDictionary *combinedRawAndBasic = #{#"MyData":#"Other", #"MyData2": myData};
n.userInfo = combinedRawAndBasic;
NSLog(#"UserInfo Combined: %#", n.userInfo);
id plistCombined = [NSPropertyListSerialization dataFromPropertyList:combinedRawAndBasic
format:NSPropertyListXMLFormat_v1_0
errorDescription:&errorDescription];
if (errorDescription) {
NSLog(#"Error while serializing: %#", errorDescription);
}
NSLog(#"Plist Combined: %#", [[NSString alloc] initWithData:plistCombined encoding:NSUTF8StringEncoding]);
// With Encoding, i.e with NSData
NSError *encodingError = nil;
NSData *encodedData = [NSKeyedArchiver archivedDataWithRootObject:myData requiringSecureCoding:YES error:&encodingError];
if (encodingError) {
NSLog(#"Error while encoding: %#", encodingError);
}
NSDictionary *encodedDict = #{#"MyData": #"Other", #"MyData2": encodedData};
n.userInfo = encodedDict;
NSLog(#"UserInfo encoded: %#", n.userInfo);
errorDescription = nil;
id plistEncodedData = [NSPropertyListSerialization dataFromPropertyList:encodedDict
format:NSPropertyListXMLFormat_v1_0
errorDescription:&errorDescription];
if (errorDescription) {
NSLog(#"Error while serializing: %#", errorDescription);
}
NSLog(#"Plist: %#", [[NSString alloc] initWithData:plistEncodedData encoding:NSUTF8StringEncoding]);
You'll see then, and it concords with the documentation that if you put directly a MyData object, it will reject all the dictionary. But not if you encode it first with NSKeyedArchiver.
Strangely, since the doc talks about an exception thrown, I would have a expect a NSUncaughtException in console and a crash, but there isn't, it's a silent one, that just reject the userInfo set.
You'll need later NSKeyedUnarchiver to decode the encoded data.
I'm trying to handle Facebook JSON data and transform it into a NSMutable Dictionary, but I'm getting (null) when I try to print the data. Although when I try to do a count, I get a number.
User_likes is NSMutableDictionary which is globally defined. I'm getting (null) on this line:
NSLog(#"User likes: %#", user_likes);
This is my code:
NSString *query =
#"SELECT page_id, type FROM page_fan WHERE uid = me() ";
// Set up the query parameter
NSDictionary *queryParam = #{ #"q": query };
// Make the API request that uses FQL
[FBRequestConnection startWithGraphPath:#"/fql"
parameters:queryParam
HTTPMethod:#"GET"
completionHandler:^(FBRequestConnection *connection,
id results,
NSError *error) {
if (error) {
NSLog(#"Error: %#", [error localizedDescription]);
} else {
user_likes = [NSJSONSerialization JSONObjectWithData:results options:kNilOptions error:&error];
NSLog(#"User likes: %#", user_likes);
NSInteger* n_user_likes = [results count];
NSInteger* n_user_likes2 = [user_likes count];
NSLog(#"n user likes %qi", n_user_likes);
NSLog(#"n user likes2 %qi", n_user_likes2);
id val = nil;
id values = [[user_likes allKeys] objectAtIndex:0 ];
NSLog(#"values id %#", values);
When I print results, I get a lot of data from Facebook, this is a sample of it:
data = (
{
"page_id" = 253370381511811;
type = "PUBLIC FIGURE";
},
{
"page_id" = 148389618201;
type = "LOCAL BUSINESS";
},
{
"page_id" = 213631462169238;
type = COMMUNITY;
},
{
"page_id" = 162297750451425;
type = "NON-PROFIT ORGANIZATION";
},
{
"page_id" = 503620106320217;
type = "MEDIA/NEWS/PUBLISHING";
},
you can't do directly
user_likes = [NSJSONSerialization JSONObjectWithData:results options:kNilOptions error:&error];
you need first create a dictionary with the data in results like this:
NSDictionary *dictionary = [NSDictionary dictionaryWithJSONData:results];
user_likes = [NSString stringWithFormat:#"%d",[[dictionary objectForKey:#"value_of_the_likes"] intValue]];
NSLog(#"%#",user_likes);
NSLog(#"%#",dictionary);
EDIT:
Please, create this class to your project and import in the class where you need use this.
#import <Foundation/Foundation.h>
#interface NSDictionary (JSONExtensions)
+(NSDictionary*)dictionaryWithJSONData:(NSData*)data;
-(NSData*)JSONValue;
-(NSString*)JSONString;
#end
#implementation NSDictionary(JSONExtensions)
+(NSDictionary*)dictionaryWithJSONData:(NSData*)data{
NSError *error = nil;
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if(error){
NSLog(#"%#",error);
return nil;
};
return result;
}
-(NSData*)JSONValue{
NSError *error = nil;
NSData *result = [NSJSONSerialization dataWithJSONObject:self options:kNilOptions error:&error];
if(error){
NSLog(#"%#",error);
return nil;
};
return result;
}
-(NSString*)JSONString{
return [[NSString alloc] initWithData:self.JSONValue encoding:NSUTF8StringEncoding];
}
#end
Hope it can help you.
maybe you forget set up options:
NSJSONReadingOptions options = NSJSONReadingAllowFragments | NSJSONReadingMutableContainers | NSJSONReadingMutableLeaves;
user_likes = [NSJSONSerialization JSONObjectWithData:results options:options error:&error];
i hope this be useful for you!
UPDATE:
Check this :
NSJsonSerialzation not parsing results from Facebook - Cocoa error 3840
Let me know if that helps you!
I am trying to send some strings and image data from a python script to an objective C application running on OSX.
I am collecting the transmitted data, using GCDAsyncSocket, and appending it to an NSMutableData until the server disconnects. I am then processing that NSData and splitting it into it's original parts.
The transmitted data consists of the following:
ID string, filled out to 16 bytes.
Image number string, filled out to 16 bytes.
Raw image data.
Termination string, filled out to 16 bytes.
The problem is that i am not receiving/getting the last chunk of data, i end up missing the end of the JPEG image, resulting in a corrupt (though mostly displayed) image, and a missing termination string.
Here is the code i am using with GCDAsyncSocket to get the data, and process it:
Socket connection:
- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
{
// This method is executed on the socketQueue (not the main thread)
#synchronized(connectedSockets)
{
[connectedSockets addObject:newSocket];
}
NSString *host = [newSocket connectedHost];
UInt16 port = [newSocket connectedPort];
dispatch_async(dispatch_get_main_queue(), ^{
#autoreleasepool {
[self logInfo:FORMAT(#"Accepted client %#:%hu", host, port)];
}
});
[newSocket readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1 tag:0];
}
Socket Data Received
- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
// This method is executed on the socketQueue (not the main thread)
dispatch_async(dispatch_get_main_queue(), ^{
#autoreleasepool {
NSLog(#"Thread Data Length is %lu", (unsigned long)[data length]);
if (!imageBuffer){
imageBuffer = [[NSMutableData alloc]init];
}
[imageBuffer appendData:[data subdataWithRange:NSMakeRange(0, [data length])]];
NSLog(#"Total Data Length is %lu", (unsigned long)[imageBuffer length]);
}
});
// Echo message back to client
[sock writeData:data withTimeout:-1 tag:ECHO_MSG];
[sock readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1 tag:0];
}
Socket Disconnected
- (void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err
{
if (sock != listenSocket)
{
dispatch_async(dispatch_get_main_queue(), ^{
#autoreleasepool {
[self logInfo:FORMAT(#"Client Disconnected")];
NSData *cameraNumberData;
NSData *imageNumberData;
NSData *imageData;
NSData *endCommandData;
//if ([data length] > 40){
cameraNumberData = [imageBuffer subdataWithRange:NSMakeRange(0, 16)];
imageNumberData = [imageBuffer subdataWithRange:NSMakeRange(16, 16)];
imageData = [imageBuffer subdataWithRange:NSMakeRange(32, [imageBuffer length]-34)];
endCommandData = [imageBuffer subdataWithRange:NSMakeRange([imageBuffer length]-16, 16)];
//}
NSString *cameraNumberString = [[NSString alloc] initWithData:cameraNumberData encoding:NSUTF8StringEncoding];
NSString *imageNumberString = [[NSString alloc] initWithData:imageNumberData encoding:NSUTF8StringEncoding];
NSString *endCommandString = [[NSString alloc] initWithData:endCommandData encoding:NSUTF8StringEncoding];
NSImage* image = [[NSImage alloc]initWithData:imageData];
if (cameraNumberString)
{
NSLog(#"Image recieved from Camera no %#", cameraNumberString);
[self logMessage:cameraNumberString];
}
else
{
[self logError:#"Error converting received data into UTF-8 String"];
}
if (imageNumberString)
{
NSLog(#"Image is number %#", imageNumberString);
[self logMessage:imageNumberString];
}
else
{
[self logError:#"Error converting received data into UTF-8 String"];
}
if (image)
{
NSLog(#"We have an image");
[self.imageView setImage:image];
}
else
{
[self logError:#"Error converting received data into image"];
}
if (endCommandString)
{
NSLog(#"Command String is %#", endCommandString);
[self logMessage:endCommandString];
}
else
{
[self logError:#"No command string"];
}
//self.imageBuffer = nil;
}
});
#synchronized(connectedSockets)
{
[connectedSockets removeObject:sock];
}
}
}
I have used wireshark, and the data is being transmitted, it's just not getting through GCDAsynSocket.
So, i'm obviously missing something. Socket programming and encoding/decoding of data like this is relatively new to me, so i am probably being an idiot.
Help greatly appreciated!
Thanks
Gareth
Ok, so i finally got this working. It involved modifying the transmitting code in Python to send a completion string at the end of the data, and watching for that. The biggest takeaway was that i needed to re-call the readDataToData: method each time the socket read some data, otherwise it would just sit there and wait, and the transmitting socket would also just sit there.
I also had to implement re-calling the second receive with a tag so i could store the received data in the correct NSMutableData object in an NSMutableArray, otherwise i had no way of knowing after the first receive which transmitting socket the data was coming from as the ID was only at the beginning of the first message.
Here is the didReadData code:
- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
dispatch_async(dispatch_get_main_queue(), ^{
#autoreleasepool {
NSInteger cameraNumberNumber = 0;
NSString *cameraNumberString = [[NSString alloc]init];
if (tag > 10){
cameraNumberNumber = tag-11;
DDLogVerbose(#"Second data loop, tag is %ld", tag);
} else {
NSData *cameraNumberData;
//if ([data length] > 40){
cameraNumberData = [data subdataWithRange:NSMakeRange(0, 16)];
NSString *cameraNumberString = [[NSString alloc] initWithData:cameraNumberData encoding:NSUTF8StringEncoding];
cameraNumberString = [cameraNumberString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
cameraNumberNumber = [cameraNumberString intValue]-1;
}
if (cameraNumberNumber+1 <= self.images.count){
if ([self.images objectAtIndex:cameraNumberNumber] == [NSNull null]){
image* cameraImage = [[image alloc]init];
[self.images replaceObjectAtIndex: cameraNumberNumber withObject:cameraImage];
}
image* cameraImage = [self.images objectAtIndex:cameraNumberNumber];
[cameraImage.imageData appendData:[data subdataWithRange:NSMakeRange(0, [data length])]];
cameraImage.cameraNumber = cameraNumberString;
if (!imageBuffer){
imageBuffer = [[NSMutableData alloc]init];
}
[imageBuffer appendData:[data subdataWithRange:NSMakeRange(0, [data length])]];
DDLogVerbose(#"Total Data Length is %lu", (unsigned long)[imageBuffer length]);
} else {
DDLogInfo(#"Wrong camera quantity!");
NSAlert *testAlert = [NSAlert alertWithMessageText:#"Wrong camera quantity!"
defaultButton:#"Ok"
alternateButton:nil
otherButton:nil
informativeTextWithFormat:#"We have recieved more images than cameras, please set No.Cameras correctly!"];
[testAlert beginSheetModalForWindow:[self window]
modalDelegate:self
didEndSelector:#selector(stop)
contextInfo:nil];
}
[sock readDataToData:[#"end" dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:cameraNumberNumber + 11];
}
});
}
and here is the socketDidDisconnect code, a lot of things in here that don't make sense out of context, but it shows how i handled the received data.
- (void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err
{
if (sock != listenSocket)
{
dispatch_async(dispatch_get_main_queue(), ^{
#autoreleasepool {
totalCamerasFetched = [NSNumber numberWithInt:1+[totalCamerasFetched intValue]];
if ([totalCamerasFetched integerValue] >= [numberOfCameras integerValue]){
for (image* cameraImage in self.images){
NSData *cameraNumberData;
NSData *imageNumberData;
NSData *imageData;
NSData *endCommandData;
NSInteger cameraNumberNumber = 0;
cameraNumberData = [cameraImage.imageData subdataWithRange:NSMakeRange(0, 16)];
imageNumberData = [cameraImage.imageData subdataWithRange:NSMakeRange(16, 16)];
imageData = [cameraImage.imageData subdataWithRange:NSMakeRange(32, [cameraImage.imageData length]-32)];
endCommandData = [cameraImage.imageData subdataWithRange:NSMakeRange([cameraImage.imageData length]-16, 16)];
NSString *cameraNumberString = [[NSString alloc] initWithData:cameraNumberData encoding:NSUTF8StringEncoding];
cameraNumberString = [cameraNumberString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *imageNumberString = [[NSString alloc] initWithData:imageNumberData encoding:NSUTF8StringEncoding];
imageNumberString = [imageNumberString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *endCommandString = [[NSString alloc] initWithData:endCommandData encoding:NSUTF8StringEncoding];
NSImage* image = [[NSImage alloc]initWithData:imageData];
cameraNumberNumber = [cameraNumberString intValue]-1;
if (cameraNumberString)
{
DDLogInfo(#"Image recieved from Camera no %#", cameraNumberString);
}
else
{
DDLogError(#"No Camera number in data");
}
if (imageNumberString)
{
DDLogInfo(#"Image is number %#", imageNumberString);
}
else
{
DDLogError(#"No Image number in data");
}
if (image)
{
DDLogVerbose(#"We have an image");
NSString* dataPath = [[NSString alloc]initWithFormat:#"%#/image%#/",self.exportLocation, imageNumberString];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]){
NSError* error;
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error];
if (error)
{
DDLogError(#"[%#] ERROR: attempting to write directory for images", [self class]);
NSAssert( FALSE, #"Failed to create directory maybe out of disk space?");
}
}
NSString* dataPathVideo = [[NSString alloc]initWithFormat:#"%#/video%#/",self.exportLocation, imageNumberString];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPathVideo]){
NSError* error;
[[NSFileManager defaultManager] createDirectoryAtPath:dataPathVideo withIntermediateDirectories:NO attributes:nil error:&error];
if (error)
{
DDLogError(#"[%#] ERROR: attempting to write directory for images", [self class]);
NSAssert( FALSE, #"Failed to create directory maybe out of disk space?");
}
}
NSString * exportLocationFull = [[NSString alloc]initWithFormat:#"%#/image%#/camera_%#.jpg",self.exportLocation, imageNumberString, cameraNumberString];
DDLogInfo(#"Full export URL = %#", exportLocationFull);
[imageData writeToFile:exportLocationFull atomically:YES];
self.currentSet = [NSNumber numberWithInt:[imageNumberString intValue]];
NSImage* imageToStore = [[NSImage alloc]initWithData:imageData];
[self.imagesToMakeVideo replaceObjectAtIndex: cameraNumberNumber withObject:imageToStore];
} else {
DDLogError(#"No image loacted in data");
}
if (endCommandString)
{
DDLogVerbose(#"Command String is %#", endCommandString);
//[self logMessage:endCommandString];
}
else
{
//[self logError:#"No command string"];
}
self.imageBuffer = nil;
}
self.totalCamerasFetched = [NSNumber numberWithInt:0];
[self loadandDisplayLatestImages];
[self createVideowithImages:imagesToMakeVideo toLocation:[[NSString alloc]initWithFormat:#"%#/video%#/image_sequence_%#.mov",self.exportLocation, self.currentSet, self.currentSet]];
processing = false;
}//end of for loop
}
});
#synchronized(connectedSockets)
{
[connectedSockets removeObject:sock];
}
}
}
also here is how i modified the Python code to add the extra "end" tag.
def send_media_to(self, ip, port, media_name, media_number, media_dir):
camera_number = self.camera.current_mode['option'].number
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((ip, port))
try:
sock.send(bytes(str(camera_number).ljust(16), 'utf-8'))
sock.send(bytes(str(media_number).ljust(16), 'utf-8'))
with open(media_dir + media_name, 'rb') as media:
sock.sendall(media.read())
finally:
sock.send(bytes(str("end").ljust(16), 'utf-8'))
sock.close()
Hopefully this helps someone else stuck in the same situation!
I have some unexpected results coming from the following code:
- (NSData *)postDataWithDict:(NSDictionary *)postDict
{
// Assume key is urlValid
NSUInteger postCount = [postDict count];
NSMutableArray *buildArray = [[NSMutableArray alloc] initWithCapacity:postCount];
for (NSString *key in postDict) {
//post data is key=value&key=value&key=value...
// start with key
NSMutableString *arrayLine = [NSMutableString stringWithString:key];
[arrayLine appendString:#"="];
// analyze and then append value
id postValue = [postDict objectForKey:key];
if ([postValue isKindOfClass:[NSNumber class]]) {
NSString *valueString = [NSString stringWithFormat:#"%#",postValue];
[arrayLine appendString:valueString];
}
else if ([postValue isKindOfClass:[NSString class]]) {
NSString *urlEncodedString = [self urlEncodeValue:postValue];
[arrayLine appendString:urlEncodedString];
}
else {
NSLog(#"postKey: %#, postValue class:%#", key, [postValue class]);
NSError *jsonError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:postValue
options:0
error:&jsonError];
if (jsonError != nil) {
NSLog(#"JSON serialization failed: %# - %#", [jsonError localizedDescription], [jsonError userInfo]);
NSLog(#"value: %#", postValue);
}
else {
// need to urlencode
NSString *stringifyJSON = [NSString stringWithUTF8String:[jsonData bytes]];
NSString *urlJSONstring = [self urlEncodeValue:stringifyJSON];
[arrayLine appendString:urlJSONstring];
}
}
[buildArray addObject:arrayLine];
}
NSString *postString = [buildArray componentsJoinedByString:#"&"];
NSData *postData = [postString dataUsingEncoding:NSUTF8StringEncoding];
//testing
NSLog(#"Post Dict: %#", postDict);
NSLog(#"Post Array: %#", buildArray);
NSLog(#"Post String: %#", postString);
NSLog(#"Post Data: %#", [NSString stringWithUTF8String:[postData bytes]]);
return postData;
}
My //testing log results:
Post Dict: {
authenticationString = b3210c0bc6d2c47f4c2f7eeea12e063d;
dataMode = updateSingle;
dateCreated = "374300293.81108";
dateModified = "374609294.313093";
dateSynced = "374610683.588062";
entityName = CommodityTypes;
myName = 21;
sortKey = 21;
username = iPhoneAdamek;
usernameString = iPhoneAdamek;
uuidKey = "53403EAE-DD4F-4226-A979-316EF7F43991";
}
Post Dict looks good. Just what I wanted.
2012-11-14 13:31:23.640 FoodyU[11393:907] Post Array: (
"myName=21",
"dataMode=updateSingle",
"dateSynced=374610683.588062",
"uuidKey=53403EAE-DD4F-4226-A979-316EF7F43991",
"sortKey=21",
"dateModified=374609294.313093",
"entityName=CommodityTypes",
"dateCreated=374300293.81108",
"authenticationString=b3210c0bc6d2c47f4c2f7eeea12e063d",
"usernameString=iPhoneAdamek",
"username=iPhoneAdamek"
)
Post Array looks good. Strings are all set to be concatenated for a HTTP POST string.
2012-11-14 13:31:23.641 FoodyU[11393:907] Post String: myName=21&dataMode=updateSingle&dateSynced=374610683.588062&uuidKey=53403EAE-DD4F-4226-A979-316EF7F43991&sortKey=21&dateModified=374609294.313093&entityName=CommodityTypes&dateCreated=374300293.81108&authenticationString=b3210c0bc6d2c47f4c2f7eeea12e063d&usernameString=iPhoneAdamek&username=iPhoneAdamek
Post String looks good. I'm ready to convert it to data to use in [NSMutableURLRequest setHTTPBody:postData].
2012-11-14 13:31:23.643 FoodyU[11393:907] Post Data: myName=21&dataMode=updateSingle&dateSynced=374610683.588062&uuidKey=53403EAE-DD4F-4226-A979-316EF7F43991&sortKey=21&dateModified=374609294.313093&entityName=CommodityTypes&dateCreated=374300293.81108&authenticationString=b3210c0bc6d2c47f4c2f7eeea12e063d&usernameString=iPhoneAdamek&username=iPhoneAdamekoneAdamek;
usernameString = iPhoneAdamek;
uuidKey = "53403EAE-DD4F-4226-A
WTF??? How did &username=iPhoneAdamek become &username=iPhoneAdamekoneAdamek;
usernameString = iPhoneAdamek;
uuidKey = "53403EAE-DD4F-4226-A?
I'm fairly new to Cocoa. Is there something wrong with:
NSData *postData = [postString dataUsingEncoding:NSUTF8StringEncoding];
or
NSLog(#"Post Data: %#", [NSString stringWithUTF8String:[postData bytes]]);
You shouldn't be using NSLog of NSData as,
NSLog(#"Post Data: %#", [NSString stringWithUTF8String:[postData bytes]]);
Instead use it as,
NSLog(#"Post Data: %#", [[NSString alloc] initWithData:postData encoding:NSUTF8StringEncoding]);
[NSString stringWithUTF8String:[postData bytes]] always returns unexpected results.
As per documentation for bytes,
bytes: Returns a pointer to the receiver’s contents.
And as per Apple documentation for stringWithUTF8String,
stringWithUTF8String:
Returns a string created by copying the data from a given C array of UTF8-encoded bytes.
Parameters: bytes - A NULL-terminated C array of bytes in UTF8 encoding.
So when you are using [postData bytes], it is not NULL-terminated and hence when you are using with stringWithUTF8String returns the data written in memory till it encounters a NULL-termination.
I am just curious if I am doing this right.
NSString *fileContents;
NSError *fileError = nil;
fileContents = [[NSString stringWithContentsOfFile:fileOnDisk
encoding:NSMacOSRomanStringEncoding
error:&fileError] retain];
if(fileError != nil) {
NSLog(#"Error : %#", [fileError localizedDescription]);
}
// Other Code ...
[fileContents release];
.
EDIT (to reflect bbums comments)
.
NSString *fileOnDisk = #"/Users/Gary/Documents/Xcode/RnD/Maya.MEL";
NSError *fileError; // Should this be *fileError = nil;
NSString *fileContents;
int status = 0;
fileContents = [[NSString stringWithContentsOfFile:fileOnDisk
encoding:NSMacOSRomanStringEncoding
error:&fileError] retain];
if(fileContents == nil) {
NSLog(#"FileError: %#", [fileError localizedDescription]);
status = 1;
} else {
NSLog(#"Success : %#", fileContents);
}
// Clean up
[fileContents release];
[pool drain];
return status;
gary
NSError *fileError = nil;
....
if(fileError != nil)
....
That is incorrect. You must not assume anything about the return-by-reference value of fileError until you check whether or not fileContents was nil. Not ever. Setting fileError to nil prior to calling the pass-error-by-reference method does nothing useful.
That is, your code should read (fixed now that I'm no longer running from plane to plane and hopping on WiFi in between connections...):
NSString *fileContents;
NSError *fileError;
fileContents = [[NSString stringWithContentsOfFile:fileOnDisk
encoding:NSMacOSRomanStringEncoding
error:&fileError] retain];
if(fileContents == nil) {
NSLog(#"Error : %#", [fileError localizedDescription]);
// ... i.e. handle the error here more
return ...; // often returning after handling the errors, sometimes you might continue
}
// Other Code ...
[fileContents release];