I need to print Ñ to screen. I'm using this code and it works fine for everything but the capital Ñ. It displays this: √ë.
CGContextShowText(textContext, [text UTF8String], strlen([text UTF8String]));
And, all these encodings give the same thing:
const char *cn = "Ñ";
NSLog(#"%#", [NSString stringWithUTF8String: cn]);
NSLog(#"%C", 0x00d1);
NSLog(#"%#", #"Ñ");
2012-06-20 16:27:09.388 app[406:707] Ñ
2012-06-20 16:27:09.392 app[406:707] Ñ
2012-06-20 16:27:09.394 app[406:707] Ñ
So, how do I display Ñ and not √ë, using NSLog or CGContextShowText?
The following works properly on my Mac:
NSLog(#"%#", [NSString stringWithUTF8String:"Ñ"]);
Make sure the text encoding has been set correctly in Xcode:
Related
Could anyone give some advise please.
In my iOS app I am parsing XML (with a help of third-party-library) and have a problem with extra whitespaces/newLines at the beginning/end of the strings. Initial string, that return this third-party-library, it's a C++ std::wstring that I convert to NSString (the encoding should be right as the content of new NSString is equal to proper part of my XML-file). After the trim length of "empty" elements (that contain only whitespaces and new lines) doesn't become zero but change it's value by half.
The code is below....
std::wstring val;
NSString *initial = [[NSString alloc] initWithBytes:val.data() length:sizeof (wchar_t)*val.size() encoding:NSUTF16LittleEndianStringEncoding];
NSString *trimmed = [initial stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
If try to output like NSLog(#"bybyby'%#'bebebe", trimmed); 'bebebe have never displayed. Looks like that there are left some new lines, whitespaces that can't be detected.
wchar_t is a 32-bit integer (on iOS and OS X), therefore you must use NSUTF32LittleEndianStringEncoding for the conversion to NSString.
Example:
std::wstring val (L" Hello World ");
NSString *initial = [[NSString alloc] initWithBytes:val.data() length:sizeof (wchar_t)*val.size() encoding:NSUTF32LittleEndianStringEncoding];
NSString *trimmed = [initial stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSLog(#"'%#'", trimmed);
// Output: 'Hello World'
What probably happened in your case (with NSUTF16LittleEndianStringEncoding)
is that every second character in the initial string is a NUL character,
which acts as a terminator when printed.
i just updated to ios 7 sdk, and I would like to trim/replace the whitespace between characters of a string whereby the numbers are taken out from ABAddressBook.
I have tried using the replace " " with "" code below, but this code doesnt seems to work in ios7 sdk, it works fine in ios 6 sdk by the way.
NSString *TrimmedNumberField = [self.numberField.text
stringByReplacingOccurrencesOfString:#" " withString:#""];
is there any other way I could do it in IOS 7?
EDIT:
It's a phone number type that I'm trying.
Input: "+65 12 345 6789"
The output i got from NSLog is " 12 345 6789"
I realized that when I added into NSDictionary and view it in NSLog, it appears that it contains a unix code representation of \u00a0 which is similar to the "dot in the middle" which is not equals to a fullstop.
thanks in advance.
Found the answer from here
phoneNumber = [phoneNumber stringByReplacingOccurencesOfString:#"." withString:#""];
// where #"." was created by typing Option+ Spacebar
The number is extracted from ABAddressbook.
You can loop over the string and remove whitespace as long as there is any
NSString *someString = #"A string with multiple spaces and other whitespace.";
NSMutableString *mutableCopy = [someString mutableCopy];
// get first occurance of whitespace
NSRange range = [mutableCopy rangeOfCharacterFromSet:[NSCharacterSet whitespaceCharacterSet]];
// If there is a match for the whitespace ...
while (range.location != NSNotFound) {
// ... delete it
[mutableCopy deleteCharactersInRange:range];
// and get the next whitespace
range = [mutableCopy rangeOfCharacterFromSet:[NSCharacterSet whitespaceCharacterSet]];
}
// no more whitespace. You can get back to an immutable string
someString = [mutableCopy copy];
The result with the string above is Astringwithmultiplespacesandotherwhitespace.
Try This:
NSString *str = #" untrimmed string ";
NSString *trimmed = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
Try This
[yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
whitespaceCharacterSet Apple Documentation for iOS says
Returns an NSData object encoding the receiver in binary format.
(NSData *)bitmapRepresentation
Return Value
An NSData object encoding the receiver in binary format.
Discussion
This format is suitable for saving to a file or otherwise transmitting or archiving.
A raw bitmap representation of a character set is a byte array of 2^16 bits (that is, 8192 bytes). The value of the bit at position n represents the presence in the character set of the character with decimal Unicode value n. To test for the presence of a character with decimal Unicode value n in a raw bitmap representation, use an expression such as the following:
So Try This
NSString *testString = #" Eek! There are leading and trailing spaces ";
NSString *trimmedString = [testString stringByTrimmingCharactersInSet:
[NSCharacterSet whitespaceAndNewlineCharacterSet]];
I have scandinavian alphabets in my array like æ, ø, å. With NSLog the output showed these alphabets as scrambled codes. How to encode NSArray with UTF8? Any help is appreciated.
I tried only:
NSArray *nnoWords = [[NSArray arrayWithArray:newNoWords] retain];
NSLog (#"nnoWords: %# ", nnoWords);
newNoWords is a NSMutableArray. nnoWords containt normal objects like NSString hello, pear, apple, etc. taken from a txt file.
EDIT 29 august 2011:
nnoWords comes from this, converted to NSMutable and then back to NSArray, thus called nnoWords. And words.txt is encoded in UTF8.
NSArray *noWords = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle]
pathForResource:#"words" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
I have also tried:
NSString *norsk = #"æ ø å";
NSLog (#"%#", norsk);
And the output is correct:
2011-08-29 13:15:23.302 scanner2[29776:207] æ ø å
The problem is the Xcode console. If you view the output from Terminal.app, you will see it is as expected.
Test case:
//clang -framework Foundation -o log_utf8 log_utf8.m
#import <Foundation/Foundation.h>
int
main(void)
{
NSString *word = #"en ord på Svenska";
NSLog(#"%#", word);
}
Sample output:
StackOverflow$ clang -framework Foundation log_utf8.m -o log_utf8
StackOverflow$ ./log_utf8
2011-08-28 20:10:09.268 log_utf8[65105:707] en ord på Svenska
If you are still seeing gibberish when you view the output from something other than Xcode's questionable built-in console, then you need to examine how you're getting your string data:
How does the text with non-ASCII characters enter your application?
What encoding does NSString think that text is in?
What encoding is it actually in? If the text comes from a file, then the file command might be able to answer this for you.
Try this:
NSLog(#"%S", [[theArray description] cStringUsingEncoding:NSUTF16LittleEndianStringEncoding]);
from this question: NSLog incorrect encoding
I want the user to input a string and then assign the input to an NSString. Right now my code looks like this:
NSString *word;
scanf("%s", &word);
The scanf function reads into a C string (actually an array of char), like this:
char word[40];
int nChars = scanf("%39s", word); // read up to 39 chars (leave room for NUL)
You can convert a char array into NSString like this:
NSString* word2 = [NSString stringWithBytes:word
length:nChars
encoding:NSUTF8StringEncoding];
However scanf only works with console (command line) programs. If you're trying to get input on a Mac or iOS device then scanf is not what you want to use to get user input.
scanf does not work with any object types. If you have a C string and want to create an NSString from it, use -[NSString initWithBytes:length:encoding:].
scanf does not work with NSString as scanf doesn’t work on objects. It works only on primitive datatypes such as:
int
float
BOOL
char
What to do?
Technically a string is made up of a sequence of individual characters. So to accept string input, you can read in the sequence of characters and convert it to a string.
use:
[NSString stringWithCString:cstring encoding:1];
Here is a working example:
NSLog(#"What is the first name?");
char cstring[40];
scanf("%s", cstring);
firstName = [NSString stringWithCString:cstring encoding:1];
Here’s an explanation of the above code, comment by comment:
You declare a variable called cstring to hold 40 characters.
You then tell scanf to expect a list of characters by using the %s format specifier.
Finally, you create an NSString object from the list of characters that were read in.
Run your project; if you enter a word and hit Enter, the program should print out the same word you typed. Just make sure the word is less than 40 characters; if you enter more, you might cause the program to crash — you are welcome to test that out yourself! :]
Taken from: RW.
This is how I'd do it:
char word [40];
scanf("%s",word);
NSString * userInput = [[NSString alloc] initWithCString: word encoding: NSUTF8StringEncoding];
yes, but sscanf does, and may be a good solution for complex NSString parsing.
Maybe this will work for you because it accepts string with spaces as well.
NSLog(#"Enter The Name Of State");
char name[20];
gets(name);
NSLog(#"%s",name);
Simple Solution is
char word[40];
scanf("%39s", word);
NSString* word2 = [NSString stringWithUTF8String:word];
The NSFileHandle class is an object-oriented wrapper for a file descriptor. For files, you can read, write, and seek within the file.
NSFileHandle *inputFile = [NSFileHandle fileHandleWithStandardInput];
NSData *inputData = [inputFile availableData];
NSString *word = [[NSString alloc]initWithData:inputData encoding:NSUTF8StringEncoding];
I've got a problem with the following code:
NSString *strValue=#"你好";
char temp[200];
strcpy(temp, [strValue UTF8String]);
printf("%s", temp);
NSLog(#"%s", temp);
in the first line of the codes, two Chinese characters are double quoted. The problem is printf function can display the Chinese characters properly, but NSLog can't.
Thanks to all. I figured out a solution for this problem. Foundation uses UTF-16 by default, so in order to use NSLog to output the c string in the example, I have to use cStringUsingEncoding to get UTF-16 c string and use %S to replace %s.
NSString *strValue=#"你好";
char temp[200];
strcpy(temp, [strValue UTF8String]);
printf("%s", temp);
strcpy(temp, [strValue cStringUsingEncoding:NSUTF16LittleEndianStringEncoding]);
NSLog(#"%S", temp);
NSLog's %s format specifier is in the system encoding, which seems to always be MacRoman and not unicode, so it can only display characters in MacRoman encoding. Your best option with NSLog is just to use the native object format specifier %# and pass the NSString directly instead of converting it to a C String. If you only have a C string and you want to use NSLog to display a message instead of printf or asl, you will have to do something like Don suggests in order to convert the string to an NSString object first.
So, all of these should display the expected string:
NSString *str = #"你好";
const char *cstr = [str UTF8String];
NSLog(#"%#", str);
printf("%s\n", cstr);
NSLog(#"%#", [NSString stringWithUTF8String:cstr]);
If you do decide to use asl, note that while it accepts strings in UTF8 format and passes the correct encoding to the syslog daemon (so it will show up properly in the console), it encodes the string for visual encoding when displaying to the terminal or logging to a file handle, so non-ASCII values will be displayed as escaped character sequences.
My guess is that NSLog assumes a different encoding for 8-bit C-strings than UTF-8, and it may be one that doesn't support Chinese characters. Awkward as it is, you might try this:
NSLog(#"%#", [NSString stringWithCString: temp encoding: NSUTF8StringEncoding]);
I know you are probably looking for an answer that will help you understand what's going on.
But this is what you could do to solve your problem right now:
NSLog(#"%#", strValue);
# define NSLogUTF8(a,b) NSLog(a,[NSString stringWithCString:[[NSString stringWithFormat:#"%#",b] cStringUsingEncoding:NSUTF8StringEncoding] encoding:NSNonLossyASCIIStringEncoding])
#define NSLogUTF8Ex(a,b) NSLog(a,[MLTool utf8toNString:[NSString stringWithFormat:#"%#",b]])
+(NSString*)utf8toNString:(NSString*)str{
NSString* strT= [str stringByReplacingOccurrencesOfString:#"\\U" withString:#"\\u"];
//NSString *strT = [strTemp mutableCopy];
CFStringRef transform = CFSTR("Any-Hex/Java");
CFStringTransform((__bridge CFMutableStringRef)strT, NULL, transform, YES);
return strT;
}