On some of my strings there seems to be somekind of newline char. I think this is the case because when i do a simple NSLog
NSLog(#"Test: %#",aNSMutableString);
I would get output like below
Test:
I am a String
I've tried using
[mutableString stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
But it does not remove whatever it is thats forcing the newline to happen.
In a string that i parse out from a file which has 4 characters 'm3u8' has 5 chars when I check the length of the new string.
Anybody got an idea of what might be going on?
Thanks
-Code
P.S.
I know I could just zap the first char out of all my strings but it feels like a hack and i still wont know whats going on.
[mutableString stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
The above will not directly modify your mutableString. It returns a new autoreleased NSString with the characters trimmed. See NSString doc.
e.x.
NSString *trimmedString = [mutableString stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
NSLog(#"Test: %#", trimmedString);
should give you expected results.
I think #Sam 's answer will fix your problem, but I think the origin of your problem is the file source. Do you know how it is encoded? Is it part of a download? My guess is that you have a Windows' file with "\n\r" terminating lines and you are using Unix string tools that are breaking on "\n", thus leaving a leading "\r".
Verify the source of the file and read the document lines with the appropriate encoding.
Related
EDIT: NSLog output works well in the simulator, but doesn't work when connected to a real device. And it seems that it is a bug — http://openradar.appspot.com/11148883. Also it happens that it is related to the LLDB, switching Xcode to GDB resolves the problem. Either it's possible to JetBrain's AppCode, which works well with the LLDB.
I have a bunch of unicode strings in the application, and if I try to output any of those strings using something like NSLog(#"%#", aString) then all the ASCII characters in the string will be printed fine but all the cyrillic letters will be messed up, so instead of
newLocation: coordinate:60.019584,30.284954 'Удельная'
I'm getting:
newLocation: coordinate:60.019584,30.284954 '–ü–æ–∫–ª–æ–Ω–Ω–æ–≥–æ—Ä—Å–∫–∞—è'
And that's quite hard to do any debugging with that kind of output. And because that app is targeted for the Russian market only I can't just change locale and use English strings.
So I wonder if there any way to make NSLog work well with unicode characters? And I'm looking only for some kind of one-liner solution, I know that there are some ways to write half a page of code and output unicode chars, but I'm looking for something shorter. Ideally I'm looking for some method of NSString that will make it all work. e.g.
NSLog(#"%#", [aString someThingThatMakesUnicodeWorkWithXcodeConsole]);
Yes, obviously you can create a string that will contain and output cyrillic letters. When I was learning Objective-C, I had the same problem in the begining(I'm as well was working with Russian words and stuff like that). So solution is to convert the string to other format like this:
NSString *string = [NSString stringWithCString:"Привет, как дела?" encoding:4];
NSLog(#"%#", string);
or
NSString *string = [NSString stringWithUTF8String:"Этот вариант короче!"];
NSLog(#"%#", string);
Hope it helps you!
P.S It means that you need to make create your strings as C-Style Strings, and set their encoding parameter to 4(UTF-8). You can see all list of avaliable parameters in the documentation to NSStringEncoding in NSString.
As far as I know it is relevant to NSLog() and LLDB on some Xcode versions. Have a try with one of these solutions:
Check log in Xcode Organizer >> Devices >> your device >> Console.
Use GDB as your debugger instead of LLDB if you are using the latter one. This can be changed from the schema options. Please refer to the steps in the comment by "cocos2d man" below.
Upgrade to Xcode 4.3.2. Some people say it solved this issue, but I haven't confirmed this myself.
Try to convert it in to UTF8 string.
NSString *str = [aString UTF8String]
NSLog(#"%#", str);
Hope this helps.
Try putting it like NSLog(#"%#", aString);
EDIT :
you can convert it in UTF8 string. This could get you through.
NSString *str = [aString UTF8String];
Hope this helps.
Try this. It works for me.
NSLog(#"%#", [NSString stringWithCString:[[places description] cStringUsingEncoding:NSASCIIStringEncoding] encoding:NSNonLossyASCIIStringEncoding]);
I am looking for a way to decode quoted-printables.
The quoted-printables are for arabic characters and look like this:
=D8=B3=D8=B9=D8=A7=D8=AF
I need to convert it to a string, and store it or display..
I've seen post on stackoverflow for the other way around (encoding), but couldn't find decoding.
Uhm, it's a little hacky but you could replace the = characters with a % character and use NSString's stringByReplacingPercentEscapesUsingEncoding: method. Otherwise, you could essentially split the string on the = characters, convert each element to a byte value (easily done using NSScanner), put the byte values into a C array, and use NSString's initWithBytes:length:encoding: method.
Note that your example isn't technically in quoted-printable format, which specifies that a quoted-printable is a three character sequence consisting of an = character followed by two hex digits.
In my case I was coming from EML... bensnider's answer worked great... quoted-printable (at least in EML) uses an = sign followed by \r\n to signify a line wrapping, so this was the code needed to cleanly translate:
(Made as a category cause I loves dem)
#interface NSString (QuotedPrintable)
- (NSString *)quotedPrintableDecode;
#end
#implementation NSString (QuotedPrintable)
- (NSString *)quotedPrintableDecode
{
NSString *decodedString = [self stringByReplacingOccurrencesOfString:#"=\r\n" withString:#""]; // Ditch the line wrap indicators
decodedString = [decodedString stringByReplacingOccurrencesOfString:#"=" withString:#"%"]; // Change the ='s to %'s
decodedString = [decodedString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; // Replace the escaped strings.
return decodedString;
}
#end
Which worked great for decoding my EML / UTF-8 objects!
Bensnider's answer is correct, the easy way of it.
u'll need to replace the "=" to "%"
NSString *s = #"%D8%B3%D8%B9%D8%A7%D8%AF";
NSString *s2 = [s stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
s2 stored "سعاد" which makes sense so this should work straight forward with out a hack
In some cases the line ends are not "=\r\n" but are only "=\n", in which case you need another step:
decodedString = [self stringByReplacingOccurrencesOfString:#"=\n" withString:#""];
Otherwise, the final step fails due to the unbalanced "%" at the end of a line.
I know nothing of the iPhone, but most email processing libraries will contain functions to do this, as email is where this format is used. I suggest searching for MIME decoding type functions, similar to those at enter link description here.
The earlier posters approach also seems fine to me - I feel he is being a little too self-deprecating in describing it as hacky :)
Please see a working solution that takes a quoted-printable-containing strings and resolves those graphemes. The only thing you should pay attention to is the encoding (that answer is based upon UTF8, by it can be easily switched to any other): https://stackoverflow.com/a/32903103/2799410
Is there any way to get newlines to be converted to actual linebreaks in UITableViewCell?
Right now they show up as \r\n (they come from a sqlite3 db) and just get displayed as such.
If I search and replace \r\n with actual return characters then it works fine, but I'm wondering if three is a proper way to do this?
Please don't suggest using other View types, the app is basically 100% complete save for this last bug and I don't want to re-test everything.
thanks
T
edit: Solution in case anyone has a similar issue:
cellText = [cellText stringByReplacingOccurrencesOfString:#"\\r\\n" withString:#"\n"];
Olaf got me on the right path, thanks.
IIRC on the Mac newline is \n, but this is not the question.
If you are seeing the four characters "\r\n" on the screen then I assume the string coming from db is escaping the backslashes. Thus when you do the manually rewrite the (escaped) string \\r\\n is converted into \n.
The standard cell is using an embedded UILabel anyway, so rewriting your cell with a custom cell using another UILabel would not change much. ;)
I just finished fixing this very issue in my code using:
myString = [[myString
stringByReplacingOccurrencesOfString:#"\\\\n" withString:#"\n"]
stringByReplacingOccurrencesOfString:#"\\\\r" withString:#""];
Hope that helps
Does anyone know of an easy way to add a single backslash (\) to a NSString in Objective-C? I am trying to have a NSString *temp = #"\/Date(100034234)\/";
I am able to get a double backslash or no backslash, but unable to get a single backslash. Any help would be appreciated. Thanks
The string #"\\" is a single backslash, #"\\\\" is a double backslash
The strings and NSLog are working fine for me (iPhone SDK 3.1.2 and Xcode 3.2.1):
NSLog(#"\\"); // output is one backslash
NSLog(#"\\\\"); // output is two backslashes
NSLog(#"\\/Date(100034234)\\/"); // output is \/Date(100034234)\/
See this answer.
This is a bug in NSLog. I found a mailing list archive with a message dated in 2002 of someone that filed a bug for this here. The person also said this:
Nothing has been done as far as I can tell. I don't understand how
they've done it, but the escaping does work for the string, just not for
NSLog.
So I guess you will have to come up with your own implementation of a log message if you really want backslashes.
This code does give the requested output:
NSString *temp = #"\\/Date(100034234)\\/";
NSLog(#"%#",temp);
However I had an issue with my JSON toolkit (SBJSON) that replaced all occurrances of "\\" with "\\\\", which did cause issues as described in the other answers and the comments.
The result was a string looking like:
#"\\\\/Date(100034234)\\\\/"
See my answer here
The solution was using:
temp = [temp stringByReplacingOccurancesOfString:#"\\\\" withString:#"\\"];
Where you want a \ add or remove. just \\ on that place.
Problem 1:
Has anyone worked with TouchXML, I am facing problem parcing rssfeed that has characters like & or even &
The parser takes the url as input and doesn’t seem to parse the XML content. NSXMLParser has no such problem for the same feed URL.
Problem 2:
Another problem with NSXMLParse is when the foundCharacter() method finds “\n”
even the call like
if([currentElementValue isEqualToString:#"\n"])
return;
currentElementValue = [currentElementValue stringByReplacingOccurrencesOfString:#"\n" withString:#""];
both these lines doesn’t seem to eliminate the \n character.
Any help guys ?
You need to escape the newline character sequence
The XML has a "\n" in it as a string, but your line above is looking for the bytecode (0x0A I think) that is a newline character in OSX.
You need to look for "\\n" which is the character sequence backslash-n.
[currentElementValue stringByReplacingOccurrencesOfString:#"\\n" withString:#""]
Will get you what you want!