I have a label where I have to put a string in Chinese extracted from a database, but nothing comes out. I noticed that the string is not pulled from database, while all other work correctly. What can I do?
char *subTitle= (char*)sqlite3_column_text(statement,13);
NSLog(#" The sutitle is %s", subTitle);
//The sutitle is
rowTable.sottotitolo = [[NSString alloc]initWithUTF8String: subTitle];
NSLog(#"The subtitle is %#", rowTable.sottotitolo);
//The subtitle is
Using methods other than Western alphabet?
NSLog(#"The string in chinese is %#", self.chinaTable.subtitle);
//The string in chinese is
//is not printed to the screen,but the database is written correctly
self.labelTitle.text = self.chinaTable.subtitle;
//empty out
Thanks in advance
While you retrieving your data from sqlite, instead of specifying the encoding schema, use this:
NSString *myChineseText = [NSString stringWithFormat:#"%s",(const char*)sqlite3_column_text(statement, index)];
NSLog(#"%#",myChineseText);
Hope, it'll solved your problem. :)
Try CFStringConvertEncodingToNSStringEncoding and kCFStringEncodingBig5_E.
Also see apple doc and for international
or for creating own encoding see
and this
unichar ellipsis = 0x2026;
NSString *theString = [NSString stringWithFormat:#"To be continued%C", ellipsis];
// custom encoding
NSStringEncoding encoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingDOSChineseTrad);
NSData *asciiData = [theString dataUsingEncoding:encoding
allowLossyConversion:YES];
NSString *asciiString = [[NSString alloc] initWithData:asciiData
encoding:encoding];
Related
Now I have a string like this "\u7c6e\u54c1\u23a8\u8357/\u4e01\u8f77\u7ba2\u7409" in Xcode, then I want convert it to "籮品⎨荗/丁轷箢琉" by Objective-C.
But I can't find any API to finish.
What should I do? To get a string content instead of string literal.
My application does not need to convert, my situation is that: I have a response from server
name = "\U672a\U6765\U822a\U8def";
I just print log:
NSString *n = dict[#"name"];
NSLog(#"%#",n); //未来航路
I think your application is the same.
The right answer is:
NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:#"\\u" withString:#"\\U"];
NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:#"\"" withString:#"\\\""];
NSString *tempStr3 = [[#"\"" stringByAppendingString:tempStr2] stringByAppendingString:#"\""];
NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];
NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData
mutabilityOption:NSPropertyListImmutable
format:NULL
errorDescription:NULL];
Following is my code
NSString *res = [valueArray valueForKey:#"key"];
NSData *newdata=[res dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
res=[[NSString alloc] initWithData:newdata encoding:NSNonLossyASCIIStringEncoding];
nameTxt.text = [NSString stringWithFormat:#"%#",res]; // Assigning to textfield
this works properly.
But sometimes it returns NULL data, mostly it happens when string contents large data.
Anyone have idea why this is happening?
NSString *res = [valueArray valueForKey:#"key"];
That's funny: using a valueForKey: on a variable named ...Array. Rather seems to be a dictionary?
NSData *newdata = [res dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
creating a raw UTF8 encoded data from a string always works: No need for allowLossyConversion.
res = [[NSString alloc] initWithData:newdata encoding:NSNonLossyASCIIStringEncoding];
Converting the UTF8 encoded raw data to ASCII does only work if the UTF8 did not contain any characters out of the very restricted ASCII range. Otherwise nil is returned.
This seems to be the only reason for this obfuscated bit of code: filter out non-ASCII strings. Otherwise the conversion does not make the slightest sense.
I'm using ABPeoplePickerNavigationController to let the user select an address. Everything works just fine in the Simulator. But if an address contains non-ASCII characters like "ü" the result is strange on my device. I have this code:
- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier {
ABMultiValueRef addressesMultiValue = ABRecordCopyValue(person, property);
NSArray *addresses = (__bridge_transfer NSArray*)ABMultiValueCopyArrayOfAllValues(addressesMultiValue);
CFRelease(addressesMultiValue);
NSDictionary *addressData = [addresses objectAtIndex:0];
NSLog(#"%#", addressData);
NSArray *addressKeys = [[NSArray alloc] initWithObjects:(NSString*)kABPersonAddressStreetKey,
(NSString*)kABPersonAddressZIPKey,
(NSString*)kABPersonAddressCityKey,
(NSString*)kABPersonAddressStateKey,
(NSString*)kABPersonAddressCountryKey,
(NSString*)kABPersonAddressCountryCodeKey, nil];
NSMutableString *address = [[NSMutableString alloc] init];
for (NSString *key in addressKeys) {
NSString *object = [addressData objectForKey:key];
if (object) {
[address appendFormat:#"%#, ", object];
}
}
NSLog(#"%#", address);
The output for addressData is like this:
{
City = "M\U00fcnchen";
Country = Deutschland;
CountryCode = de;
Street = "Some street";
ZIP = 81000;
}
and the output for address is:
Some street, 81000, München, Deutschland, de,
The correct output for address would be "Some street, 81000, München, Deutschland, de, ". What puzzles me the most is, that \U00fc is the correct Unicode code point for "ü". I have tried many things including printing out every single unichar on its own, but the result doesn't change. Whatever I do when accessing the value in the NSDictionary seems to kill the Unicode character. What can I do to simply get the address correctly?
Thank you very much in advance!
There is nothing wrong with your code or the output. You are displaying it wrong. The letter 'ü' encoded in UTF-8 is 0xC3 0xBC. In the MacRoman character set the byte 0xC3 represents the character '√' and the byte 0xBC represents 'º'. Look at your output as UTF-8 (which it is) and not as MacRoman (which it is not) and you're set.
Use NSUTF8StringEncoding to encode your string using method: stringWithUTF8String:.
For example,
NSString *str = [NSString stringWithUTF8String:"your string for encoding"];
As in your case
NSString *object = [NSString stringWithUTF8String:[[addressData objectForKey:key] cStringUsingEncoding:NSUTF8StringEncoding]];
Or
NSString *object = [NSString stringWithUTF8String:[[addressData objectForKey:key] UTF8String]];
Let me know if you need more help.
Hope this helps.
Hi i am reading a book by aaron hillegass on cococa programming and I doing one of the mini tasks he asks us to do.
the task is to create an application that has one window open and has 1 input text field, a button and a label.
when a user inputs some text and presses the button, the label displays the text and the length of the text inputted.
Here is what I have got so far
//retrieve text from textfield
NSString *string = [textFieldInput stringValue];
//retrieve length of text and store in NSInteger called length
NSInteger length = [string length];
//store length in string format
NSString *string_length = [NSString stringWithFormat:#"%d", length];
//join strings
NSString *full_string = [string stringByAppendingString:(#"has ",string_length,#" characters")];
//set label text
[textField setStringValue:full_string];
however the actual string is shown and the characters string is shown, just not the string_length. any suggestions and am i going about this in the right way? Thanks.
NSString *fullString = [string stringByAppendingFormat:#"has %# characters", string_length];
//retrieve text from textfield
NSString *string = [textFieldInput stringValue];
NSString *fullString = [string stringByAppendingFormat:#" has %d characters", [string length]];
//set label text
[textField setStringValue:fullString];
Your usage of stringByAppendingString: is wrong.
If I understand you correctly, you are trying to pass a list of strings that should be appended to string but that method only takes a single string argument.
You can try the following:
NSString* fullString = [string stringByAppendingString:[NSString stringWithFormat:#"%# %# %#", #"has ", string_length, #" characters"]];
I'm trying to use the BEncoding ObjC class to decode a .torrent file.
NSData *rawdata = [NSData dataWithContentsOfFile:#"/path/to/the.torrent"];
NSData *torrent = [BEncoding objectFromEncodedData:rawdata];
When I NSLog torrent I get the following:
{
announce = <68747470 3a2f2f74 6f727265 6e742e75 62756e74 752e636f 6d3a3639 36392f61 6e6e6f75 6e6365>;
comment = <5562756e 74752043 44207265 6c656173 65732e75 62756e74 752e636f 6d>;
"creation date" = 1225365524;
info = {
length = 732766208;
name = <7562756e 74752d38 2e31302d 6465736b 746f702d 69333836 2e69736f>;
"piece length" = 524288;
....
How do I convert the name into a NSString? I have tried..
NSData *info = [torrent valueForKey:#"info"];
NSData *name = [info valueForKey:#"name"];
unsigned char aBuffer[[name length]];
[name getBytes:aBuffer length:[name length]];
NSLog(#"File name: %s", aBuffer);
..which retrives the data, but seems to have additional unicode rubbish after it:
File name: ubuntu-8.10-desktop-i386.iso)
I have also tried (from here)..
NSString *secondtry = [NSString stringWithCharacters:[name bytes] length:[name length] / sizeof(unichar)];
..but this seems to return a bunch of random characters:
扵湵畴㠭ㄮⴰ敤歳潴⵰㍩㘸椮潳
The fact the first way (as mentioned in the Apple documentation) returns most of the data correctly, with some additional bytes makes me think it might be an error in the BEncoding library.. but my lack of knowledge about ObjC is more likely to be at fault..
That's an important point that should be re-emphasized I think. It turns out that,
NSString *content = [NSString stringWithUTF8String:[responseData bytes]];
is not the same as,
NSString *content = [[NSString alloc] initWithBytes:[responseData bytes]
length:[responseData length] encoding: NSUTF8StringEncoding];
the first expects a NULL terminated byte string, the second doesn't. In the above two cases content will be NULL in the first example if the byte string isn't correctly terminated.
How about
NSString *content = [[[NSString alloc] initWithData:myData
encoding:NSUTF8StringEncoding] autorelease];
NSData *torrent = [BEncoding objectFromEncodedData:rawdata];
When I NSLog torrent I get the following:
{
⋮
}
That would be an NSDictionary, then, not an NSData.
unsigned char aBuffer[[name length]];
[name getBytes:aBuffer length:[name length]];
NSLog(#"File name: %s", aBuffer);
..which retrives the data, but seems to have additional unicode rubbish after it:
File name: ubuntu-8.10-desktop-i386.iso)
No, it retrieved the filename just fine; you simply printed it incorrectly. %s takes a C string, which is null-terminated; the bytes of a data object are not null-terminated (they are just bytes, not necessarily characters in any encoding, and 0—which is null as a character—is a perfectly valid byte). You would have to allocate one more character, and set the last one in the array to 0:
size_t length = [name length] + 1;
unsigned char aBuffer[length];
[name getBytes:aBuffer length:length];
aBuffer[length - 1] = 0;
NSLog(#"File name: %s", aBuffer);
But null-terminating the data in an NSData object is wrong (except when you really do need a C string). I'll get to the right way in a moment.
I have also tried […]..
NSString *secondtry = [NSString stringWithCharacters:[name bytes] length:[name length] / sizeof(unichar)];
..but this seems to return random Chinese characters:
扵湵畴㠭ㄮⴰ敤歳潴⵰㍩㘸椮潳
That's because your bytes are UTF-8, which encodes one character in (usually) one byte.
unichar is, and stringWithCharacters:length: accepts, UTF-16. In that encoding, one character is (usually) two bytes. (Hence the division by sizeof(unichar): it divides the number of bytes by 2 to get the number of characters.)
So you said “here's some UTF-16 data”, and it went and made characters from every two bytes; each pair of bytes was supposed to be two characters, not one, so you got garbage (which turned out to be mostly CJK ideographs).
You answered your own question pretty well, except that stringWithUTF8String: is simpler than stringWithCString:encoding: for UTF-8-encoded strings.
However, when you have the length (as you do when you have an NSData), it is even easier—and more proper—to use initWithBytes:length:encoding:. It's easier because it does not require null-terminated data; it simply uses the length you already have. (Don't forget to release or autorelease it.)
A nice quick and dirty approach is to use NSString's stringWithFormat initializer to help you out. One of the less-often used features of string formatting is the ability to specify a mximum string length when outputting a string. Using this handy feature allows you to convert NSData into a string pretty easily:
NSData *myData = [self getDataFromSomewhere];
NSString *string = [NSString stringWithFormat:#"%.*s", [myData length], [myData bytes]];
If you want to output it to the log, it can be even easier:
NSLog(#"my Data: %.*s", [myData length], [myData bytes]);
Aha, the NSString method stringWithCString works correctly:
With the bencoding.h/.m files added to your project, the complete .m file:
#import <Foundation/Foundation.h>
#import "BEncoding.h"
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// Read raw file, and de-bencode
NSData *rawdata = [NSData dataWithContentsOfFile:#"/path/to/a.torrent"];
NSData *torrent = [BEncoding objectFromEncodedData:rawdata];
// Get the file name
NSData *infoData = [torrent valueForKey:#"info"];
NSData *nameData = [infoData valueForKey:#"name"];
NSString *filename = [NSString stringWithCString:[nameData bytes] encoding:NSUTF8StringEncoding];
NSLog(#"%#", filename);
[pool drain];
return 0;
}
..and the output:
ubuntu-8.10-desktop-i386.iso
In cases where I don't have control over the data being transformed into a string, such as reading from the network, I prefer to use NSString -initWithBytes:length:encoding: so that I'm not dependent upon having a NULL terminated string in order to get defined results. Note that Apple's documentation says if cString is not a NULL terminated string, that the results are undefined.
Use a category on NSData:
NSData+NSString.h
#interface NSData (NSString)
- (NSString *)toString;
#end
NSData+NSString.m
#import "NSData+NSString.h"
#implementation NSData (NSString)
- (NSString *)toString
{
Byte *dataPointer = (Byte *)[self bytes];
NSMutableString *result = [NSMutableString stringWithCapacity:0];
NSUInteger index;
for (index = 0; index < [self length]; index++)
{
[result appendFormat:#"0x%02x,", dataPointer[index]];
}
return result;
}
#end
Then just NSLog(#"Data is %#", [nsData toString])"
You can try this. Fine with me.
DLog(#"responeData: %#", [[[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSASCIIStringEncoding] autorelease]);
Sometimes you need to create Base64 encoded string from NSData. For instance, when you create a e-mail MIME. In this case use the following:
#import "NSData+Base64.h"
NSString *string = [data base64EncodedString];
This will work.
NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];