I am receiving the data in an iPad application from a socket connected.
I am converting the data received to NSString using the method below:
NSString *data = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding].
Then I am creating a substring from the string using the
NSString *substring1 = [data substringFromIndex:length-9]
NSString *substring2 = [data substringFromIndex:length-3]
where length is [data length].
Then I am comparing the substring2 with #"/>" string as below
[substring2 compare:#"/>"]
Here I checked the value of the substring2 while debugging the application the value is #"/>"
but the comparison result is returned as NSOrderedDescending instead of NSOrderedSame.
Can anyone please help?
Your string is having trailing space. The string which you are extracting as length - 3, it must be of length 3.
Now you are comparing it with #"/>" which is having length 2.
You need to do it be below way:
NSString *data = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding].
data = [data stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
Now take the substring and compare.
Related
I am trying to implement an app where I would like to show some text in Spanish format. For example I would like to show "España" but in my label it shows "Espa√ɬ±a" and also it changes the text for some of other text.
How to get rid of these. If anybody could help. Thanks.
Edit: When i am getting my response it logs that Below result
Message = (
"Espa\U221a\U00c9\U00ac\U00b1a:1.3\U221a\U00c7\U00ac\U00a2/min"
);
But when i extract the value according to key from Dictionary it shows
España:1.3¢/min
It means when i am getting the value from dictionary it cant do proper decoding.
how to resolve this. Any idea..?
First convert your response String to NSData using NSUTF8StringEncoding encoding, then again convert the same data to finalString like below.
NSString *string = #"España"; //Your response String goes here
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSString *finalString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
lblTemp.text = finalString;
UPDATE 1
I think there is some error from your response, Please see below
NSString *string = #"Nu\\u0161a Florjan\\u010di\\u010d";
NSString *finalString = [NSString
stringWithCString:[string cStringUsingEncoding:NSUTF8StringEncoding]
encoding:NSNonLossyASCIIStringEncoding];
NSLog(#"finalString = %#", finalString);
Output of above code is,
finalString = Nuša Florjančič
UPDATE 2
If you want output string like "España", your desired response should be "Espa\u00F1a", Find below,
NSString *string = #"Espa\\u00F1a";
NSString *finalString = [NSString
stringWithCString:[string cStringUsingEncoding:NSUTF8StringEncoding]
encoding:NSNonLossyASCIIStringEncoding];
NSLog(#"%#",finalString);
Output is España
I am looking for solution where i want to store English + Arabic + Emoji Character to store to Database and retrieve it back while display.
Below is the code what i have used to support Emoji, after that Arabic text is not showing.
+(NSString *)emojiToSave:(NSString *)str
{
NSData *dataForEmoji = [str dataUsingEncoding:NSNonLossyASCIIStringEncoding];
NSString *encodevalue = [[NSString alloc]initWithData:dataForEmoji encoding:NSUTF8StringEncoding];
return encodevalue;
}
+(NSString *)emojiToDisplay:(NSString *)str
{
NSData *msgData = [str dataUsingEncoding:NSUTF8StringEncoding];
NSString *goodMsg = [[NSString alloc] initWithData:msgData encoding:NSNonLossyASCIIStringEncoding];
return goodMsg;
}
Can anyone pls suggest to give support for Arabic what change i should do?
Thanks in advance.
Try convert it into base64 code, then insert base64 code to database:
//Original string to base64 string
NSString *emojiString = #"مرحبا 😀 Hello";
NSData *emojiData = [emojiString dataUsingEncoding:NSUTF8StringEncoding];
NSString *base64String = [emojiData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
//Base64 string to original string
NSData *base64Data = [[NSData alloc] initWithBase64EncodedString:base64String options:NSDataBase64DecodingIgnoreUnknownCharacters];
NSString *originalString =[[NSString alloc] initWithData:base64Data encoding:NSUTF8StringEncoding];
NSLog(#"Result: %#",originalString);
Output:
You have to use an encoding that supports emoji and arabic characters. ASCII doesn't support that.
You should use NSUTF8StringEncoding everywhere, and you're fine.
Why are you using ASCII anyways? Why are you converting a string to an NSData and then back to NSString again? It doesn't make sense.
I am trying to display a string in all sorts of items such as UIlabel,UItextview,Uitextfield etc.....I am trying to do like this in a manner like this
NSData *data1 = [title dataUsingEncoding:NSUTF8StringEncoding];
NSString *goodValue = [[NSString alloc] initWithData:data1 encoding:NSNonLossyASCIIStringEncoding];
label.text=goodvalue;
this is working sometimes for me ,but some times it returns null for the string like this "Youtube\ud83d\ude27\ud83d\ude2e\ud83d\ude2f\ud83d".Can anybody guide me on this?
Emoji characters are in unicode plane 1 and thus require more than 16 bits to represent a code point. Thus two UTF8 representations or one UTF32 representation. Unicode is actually a 21-bit system and for plane 0 characters (basically everything except emoji) 16 bits is sufficient and we get by using 16 bits. Emoji need more than 16 bits.
"Youtube\ud83d\ude27\ud83d\ude2e\ud83d\ude2f\ud83d". is invalid, it is part of a utf16 unicode escaped string, the last \ud83d is 1/2 of an emoji character.
Also, inorder to create a literal string with the escape character "\" the escape character must be escaped: "\\".
NSString *emojiEscaped = #"Youtube\\ud83d\\ude27\\ud83d\\ude2e\\ud83d\\ude2f";
NSData *emojiData = [emojiEscaped dataUsingEncoding:NSUTF8StringEncoding];
NSString *emojiString = [[NSString alloc] initWithData:emojiData encoding:NSNonLossyASCIIStringEncoding];
NSLog(#"emojiString: %#", emojiString);
NSLog output:
emojiString: Youtube😧😮😯
The emoji string can also be expressed in utf32:
NSString *string = #"\U0001f627\U0001f62e\U0001f62f";
NSLog(#"string: %#", string);
NSLog output:
string1: 😧😮😯
NSString *str = #"Happy to help you \U0001F431";
NSData *data = [str dataUsingEncoding:NSNonLossyASCIIStringEncoding];
NSString *valueUnicode = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSData *dataa = [valueUnicode dataUsingEncoding:NSUTF8StringEncoding];
NSString *valueEmoj = [[NSString alloc] initWithData:dataa encoding:NSNonLossyASCIIStringEncoding];
_lbl.text = valueEmoj;
I'm trying to encrypt/decrypt an NSString and return the original string in the end. Here's how I convert the string to a data object:
NSData *string_data = [string dataUsingEncoding:NSUTF8StringEncoding];
And after that data has been encrypted/decrypted I want it back to the original string by doing:
NSString *to_string = [NSString stringWithCString:[decrypted_data bytes] encoding:NSUTF8StringEncoding];
The encoding seems to match, but I still get a null when I try to print out to_string to the console. I've tried all sorts of encoding settings. It doesn't seem to work.
Use:
NSString *to_string = [[NSString alloc] initWithData:string_data encoding:NSUTF8StringEncoding];
It is not safe to use stringWithCString because the bytes buffer you get from NSData is not guaranteed to be null-terminated.
I have a NSdata object that is populated with a bunch of information thats formated in hex.. I am trying to convert it into its proper string representation but am struggling to have any success.
One thing I have tried is to simply put it into a NSString and then NSLog it with a special character identifier thingy.. forgot the word (%02x), However to do this I am encoding it to NSUTF16.. which i dont want to do.. I mearly want to see exactly whats the data I am getting looks like as a NSString.
The reason I am doing this is because I am having some issues with my encoding later on in my code and im not sure if its because the data I am receiving is incorrect or me stuffing it up at some point when I am handling it.
Any help would be appreciated.
You can get a string representation of your NSData like so:
NSData *data = (your data)
NSString *string = [NSString stringWithCString:[data bytes] encoding:NSUTF8StringEncoding];
Does that answer your question?
Maybe I haven't understood, but something like this:
NSData *yourData;
NSLog(#"%#", [yourData description]);
doesn't fit your need?
Give this a try -
-(NSString*)hexToString:(NSData*)data{
NSString *hexString = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
if (([hexString length] % 2) != 0)
return nil;
NSMutableString *string = [NSMutableString string];
for (NSInteger i = 0; i < [hexString length]; i += 2) {
NSString *hex = [hexString substringWithRange:NSMakeRange(i, 2)];
NSInteger decimalValue = 0;
sscanf([hex UTF8String], "%x", &decimalValue);
[string appendFormat:#"%d", decimalValue];
}
return string;
}