How can a Unicode escape sequence be added to a string in Localizeable.strings file if the string is casted to NSString?
Here is one (ugly) example:
// Localized string: "\u{200F}Number %#" = "\u{200E}Number %#";
let string = NSMutableAttributedString(string: NSString(format: NSLocalizedString("Number %#", comment: "") as NSString, aNumber as NSNumber)) as String
From this question I understand that the problem is the incompatible escape sequences of Localizeable.strings and NSString.
Adding the unicode characters directly is Localizeable.strings file is not an option because I need to insert bidirectional semantics markers that are not printable characters. They would also be lost in most translation programs.
How can I work around that?
Related
I have an encode string which I have to convert to a form which has HTML tags and display it in a webview. The encoded data I have is of this format :-
Having+a+pet+is+quite+like+parenting%2C+you+just+cannot+stand+the+chance+being+away+from+them.+Still%2C+very+often+it+occurs+that+you+cannot+have+your+pets+around+everywhere+so+you+need+to+shelter+them+elsewhere+for+a+while.+But+at+the+end+of+the+day%2C+one+must+admit+that+it+is+pretty+hard+to+trust+anyone+with+our+furry+babies.+Who+knows+them+better+than+us%2C+their+habits%2C+eating+orders%2C+temperaments+and+socialization+tendencies%3F%0D%0A%0D%0AIt+is+because+of+this+very+reason+that+we+at+%3Ca+href%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%22+target%3D%22_blank%22+rel%3D%22noopener%22%3EWhat%92s+Up+Noida+are+sharing%3C%2Fa%3E+with+you+the+list+of+5+pet+boarding+facilities+which+you+can+actually+trust.%0D%0A%3Ch4%3E%3Cstrong%3EThe+Dog+Resorts%2C+Noida+%3C%2Fstrong%3E%3C%2Fh4%3E%0D%0AAt+the+Dog+Resort+Noida%2C+be+assured+that+your+pet+will+be+cared+for+by+thorough+professionals.+%A0They+resort+boasts+of+a+10%2C000+sq.+ft.+premises+area+where+about+5000+sq+.ft+is+wide+open+green+area+to+make+your+pet+stay+playful+and+cheering.+The+best+aspect+about+the+place+is+that+there+is+complete+medical+care+and+behavioral+apprehending+of+pets+as+they+have+a+dedicated+team+of+veterinary+doctors%2C+dog+trainers%2C+and+other+pet+care+expertise.%0D%0A%0D%0A%3Ca+href%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2FDog-resort-noida.png%22%3E%3Cimg+class%3D%22aligncenter+wp-image-4902+size-full%22+src%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2FDog-resort-noida.png%22+alt%3D%22Dog+resort+noida%22+width%3D%221052%22+height%3D%22326%22+%2F%3E%3C%2Fa%3E%0D%0A%0D%0A%3Cstrong%3EAddress%3A%A0+Sector+112%2C+Noida%3C%2Fstrong%3E%0D%0A%3Cstrong%3E+Contact%3A+9911782646%3C%2Fstrong%3E%0D%0A%3Ch4%3E%3Cstrong%3EBest+Pet+Boarding+%3C%2Fstrong%3E%3C%2Fh4%3E%0D%0AThey+are+indeed+one+of+the+highly+rated+and+positively+reviewed+pet+boarding+facilities+in+Noida.+Not+just+for+dogs+but+they+have+a+friendly+providence+of+pet+care+and+day+boarding+services+for+other+pets+like+fish%2C+bird%2C+guinea+pig%2C+hamster%2C+cat%2C+and+others+as+well.%A0+The+idea+of+creating+is+%91no-cage%92+free+space+for+beloved+pets+was+developed+by+Kaveri+Rana+Bhardwaj+and+Yashraj+Bhardwaj.+At+the+Best+Pet+Boarding%2C+the+emphasis+is+on+making+your+pet+socialize+and+have+a+free+will+of+wandering+in+wide+space.+They+believe+in+the+unique+concept+of+letting+in+a+trained+dog+which+said+to+be+their+%91alpha%92+among+other+pet+dogs%2C+this+maintains+the+decorum+all+the+time.%0D%0A%0D%0A%3Ca+href%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2Fbest-pet-boarding.jpg%22%3E%3Cimg+class%3D%22aligncenter+wp-image-4903+size-full%22+src%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2Fbest-pet-boarding.jpg%22+alt%3D%22best+pet+boarding+noida%22+width%3D%22960%22+height%3D%22489%22+%2F%3E%3C%2Fa%3E%0D%0A%0D%0A%3Cstrong%3EAddress%3A+B+14+1+Omicron+2%2C+Greater+Noida%3C%2Fstrong%3E%0D%0A%3Cstrong%3E+Phone%3A+09711951179%3C%2Fstrong%3E%0D%0A%3Ch4%3E%3Cstrong%3EPet+Home+Affairs+Day+Boarding+%3C%2Fstrong%3E%3C%2Fh4%3E%0D%0A%3Ca+style%3D%22font-size%3A+14px%3B+font-family%3A+%27Open+Sans%27%2C+Arial%2C+sans-serif%3B+color%3A+%2319232d%3B+text-decoration-line%3A+underline%3B%22+href%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2Fpet-home-affairs-day-care.jpg%22%3E%3Cimg+class%3D%22alignright+wp-image-4906+size-full%22+style%3D%22font-size%3A+14px%3B%22+src%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2Fpet-home-affairs-day-care.jpg%22+alt%3D%22pet+boarding+in+noida%22+width%3D%22350%22+height%3D%22263%22+%2F%3E%3C%2Fa%3E%0D%0A%0D%0APet+Home+Affairs+enjoys+a+sterling+reputation+in+pet+care+industry+and+is+one+of+the+remarkable+services+in+Noida.+At+the+boarding%2C+there+are+professionals+who+understand+the+needs+of+your+pet+and+also+your+preferences+about+the+specific+services+you+need+for+your+pet.+Pet+care+system+is+well+scheduled+for+meal+and+medicine+timings+and+under+the+care+of+pet+care+experts+here.%0D%0A%0D%0A%3Cstrong%3EAddress%3A%A0+Supertech+Capetown%2C+Sector+74%2C+Noida.%3C%2Fstrong%3E%0D%0A%3Cstrong%3E+Phone%3A+09873204636%3C%2Fstrong%3E%0D%0A%3Ch4%3E%3Cstrong%3EClean+Cute+%3C%2Fstrong%3E%3C%2Fh4%3E%0D%0AWith+their+10%2C000+sq.+ft+wide+space+of+Dog+day+care+and+pet+holiday+home%2C+Clean+Cute+is+known+to+serve+all+sizes%2C+kinds%2C+breeds%2C+and+age+of+pets.+They+are+biggest+and+best+boarding+facility+not+only+in+Noida+but+also+in+NCR.+Clean+Cute+is+managed+by+a+highly+skilled+dog+handling+team+offering+pet+grooming+services%2C+recreational+activities%2C+health+care%2C+therapies%2C+pet+parenting+counseling%2C+dog+behavior+management%2C+skin+care%2C+dog+rehabilitation+and+actually%2C+what+not.%0D%0A%0D%0A%3Ca+href%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2FBoarding-Large-File.jpg%22%3E%3Cimg+class%3D%22aligncenter+wp-image-4907+size-large%22+src%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2FBoarding-Large-File-1024x682.jpg%22+alt%3D%22dog+boarding+in+noida%22+width%3D%22702%22+height%3D%22468%22+%2F%3E%3C%2Fa%3E%0D%0A%0D%0A%26nbsp%3B%0D%0A%0D%0A%3Cstrong%3EAddress%3A%A0+Sector+112%2C+Noida%3C%2Fstrong%3E%0D%0A%3Cstrong%3E+Phone%3A+08076548163%3C%2Fstrong%3E%0D%0A%3Ch4%3E%3Cstrong%3EGoDogee+Pet+services+%3C%2Fstrong%3E%3C%2Fh4%3E%0D%0AGoDogee+is+one+of+the+India%92s+leading+pet+care+services+providing+pet+day+care%2C+pet+hotel%2C+pet+grooming%2C+pet+vaccination%2C+pet+treatment%2C+pet+mating+and+other+interesting+and+unique+sort+of+services.%0D%0A%0D%0A%3Cimg+class%3D%22aligncenter+size-full+wp-image-4905%22+src%3D%22https%3A%2F%2Fwww.whatsuplife.in%2Fnoida%2Fblog%2Fwp-content%2Fuploads%2F2017%2F06%2Fgodogee.jpg%22+alt%3D%22%22+width%3D%221920%22+height%3D%22790%22+%2F%3E%0D%0A%0D%0A%3Cstrong%3EAddress%3A+J-10%2C+Noida+Rd%2C+H+Block%2C+Sector+8%2C+Noida%3C%2Fstrong%3E%0D%0A%3Cstrong%3E+Phone%3A+09910664343%3C%2Fstrong%3E
What kind of format is this and how do I convert it into text with html tags ?
I'm currently using this method but I'm getting a nil return value :
func urlDecode(_ htmlString: String) -> String {
var decodedURL = htmlString.replacingOccurrences(of: "+", with: " ")
decodedURL = decodedURL.removingPercentEncoding!
return decodedURL
}
So you are getting nil, which means that there is something in your string that is invalid. How could we find out what? Well it's certainly not spaces, so let's break your string into "words":
var decodedURL = htmlString.replacingOccurrences(of: "+", with: " ")
let chunks = decodedURL.components(separatedBy: " ")
and now try to decode each "word" and see which ones fail:
for chunk in chunks
{
let decoded = chunk.removingPercentEncoding
if decoded == nil
{
print("\(chunk)")
}
}
this outputs:
rel%3D%22noopener%22%3EWhat%92s
%A0They
%2F%3E%3C%2Fa%3E%0D%0A%0D%0A%3Cstrong%3EAddress%3A%A0
well.%A0
%91no-cage%92
%91alpha%92
here.%0D%0A%0D%0A%3Cstrong%3EAddress%3A%A0
%2F%3E%3C%2Fa%3E%0D%0A%0D%0A%26nbsp%3B%0D%0A%0D%0A%3Cstrong%3EAddress%3A%A0
India%92s
Now removingPercentEncoding decodes UTF-8, so checking each of those % sequences to see if they are valid UTF-8 shows that %91, %92 & %A0 are not. However they are valid Windows-1252 encodings - single curly quotes and the non-breaking space.
So you need to decode the string as Windows-1252 not UTF-8. Time for you to look in the documentation...
HTH
From apple,
A new string with the percent-encoded sequences removed, or nil if the
receiver contains an invalid percent-encoding sequence.You must call
this method only on strings that you know to be percent-encoded.
Calling this method on strings that are not percent-encoded can lead
to misinterpreting a percent character as the beginning of a
percent-encoded sequence.
You get nil because removingPercentEncoding does not recognize some of your percent encoding. I pasted it onto online parser and find out that %A0 and %92 seem to be suspicious.
I am new to swift and want to match all the unicode strings using regex
For example:
var s="😀 emoji 😀"
When I decoded the above string the result is:
"\ud83d\ude00 emoji \ud83d\ude00"
I want to replace each emoji with say *
In java I used the regex as:
"[\uD800-\uDBFF\uDC00-\uDFFF]" and was working
In swift I am using the same regex but its replacing every character with *
I want the result as * emoji *
Help is highly appreciated
The Unicode code point of the emoji you have shown is U+1F600.
(Unicode 9.0 Character Code Charts - Emoticons)
And your regex pattern (which may work for UTF-16 representation) [\uD800-\uDBFF\uDC00-\uDFFF] matches all non-BMP characters -- U+10000...U+10FFFF, which contains most of all emojis but also contains huge non-emoji characters.
So, as you say "[\uD800-\uDBFF\uDC00-\uDFFF]" was working, the equivalent pattern in NSRegularExpression is "[\\U00010000-\\U0010FFFF]".
var s="😀 emoji 😀"
let regex = try! NSRegularExpression(pattern: "[\\U00010000-\\U0010FFFF]", options: [])
let replaced = regex.stringByReplacingMatchesInString(s, options: [], range: NSRange(0..<s.utf16.count), withTemplate: "*") //->"* emoji *"
(Addition)
To see Unicode code points in your string literal:
s.unicodeScalars.forEach {
print(String(format: "U+%04X ", Int($0.value)))
}
For your example string, I get:
U+1F600
U+0020
U+0065
U+006D
U+006F
U+006A
U+0069
U+0020
U+1F600
I need to be able to create a String that is "\b". But when I try to, Xcode throws a compile-time error: Invalid escape sequence in literal. I don't understand why though, "\r" works just fine. If I put "\\b" then that's what is actually stored in the String, which is not what I need - I only need one backslash. To me, this seems to be a Swift oddity because it works just fine in Objective-C.
let str = "\b" //Invalid escape sequence in literal
NSString *str = #"\b"; //works great
I need to generate this string because "\b" is the only way to detect when the user pressed 'delete' when using UIKeyCommand:
let command = UIKeyCommand(input: "\b", modifierFlags: nil, action: "didHitDelete:")
How can I work around this issue?
EDIT: It really doesn't want to generate a String that is only "\b", this does not work - it stays the original value:
var delKey = "\rb"
delKey = delKey.stringByReplacingOccurrencesOfString("r", withString: "", options: .LiteralSearch, range: nil)
The Swift equivalent of \b is \u{8}. It maps to ASCII control code 8, just like \b in Objective C. I've tested this and found it to work fine with UIKeyCommand, in this earlier answer of mine.
Example snippet:
func keyCommands() -> NSArray {
return [
UIKeyCommand(input: "\u{8}", modifierFlags: .allZeros, action: "backspacePressed")
]
}
I don't believe it is supported.
Based on the Swift documentation https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/StringsAndCharacters.html:
String literals can include the following special Unicode characters:
The escaped special characters \0 (null character), \ (backslash), \t
(horizontal tab), \n (line feed), \r (carriage return), \" (double
quote) and \' (single quote)
An arbitrary Unicode scalar, written as
\u{n}, where n is between one and eight hexadecimal digits
The ASCII for the \b is 8. If you do the following, you'll see these results
let bs = "\u{8}"
var str = "Simple\u{8}string"
println(bs) // Prints ""
println("bs length is \(bs.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))") // Prints 1
println(str) // Prints Simplestring
let space = "\u{20}"
println(space) // Prints " "
println("space length is \(space.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))") // Prints 1
str = "Simple\u{20}string"
println(str) // Prints Simple string
It looks like while ASCII 8 "exists", it is "ignored".
Is there seriously not a way natively to URL Encode the value of a query string parameter that has a "+" character in it?
e.g.
me+blah#domain.net
to
me%2Bblah%40#domain.net?
I tried solutions like posted in these other questions, but those do not properly encode that email.
Swift - encode URL
How do I URL encode a string
A swift solution would be preferred as that is what I am working in at the moment, but I am capable of translating Objective-C Code to swift code for the most part.
Specifically I am trying to x-www-form-urlencoded encode query string values in the body of POST request.
let email = "me+blah#domain.net"
let output = CFURLCreateStringByAddingPercentEscapes(nil, email as NSString, nil, ":/?#!$&'()*+,;=" as NSString, CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding))
// output = "me%2Bblah%40domain.net"
CFURLCreateStringByAddingPercentEscapes doesn't escape + or # by default, but you can specify it (as I did along with other characters, in the ":/?#!$&'()*+,;=" string).
Edit: If you want output to be a Swift string:
let output = (CFURLCreateStringByAddingPercentEscapes(nil, email as NSString, nil, ":/?#!$&'()*+,;=" as NSString, CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)) as NSString) as String
println(("me+blah#domain.net" as NSString)
.stringByAddingPercentEncodingWithAllowedCharacters(
NSCharacterSet.alphanumericCharacterSet()))
Output:
Optional("me%2Bblah%40domain%2Enet")
In Objective-C:
NSString *encodedString =
["me+blah#domain.net" stringByAddingPercentEncodingWithAllowedCharacters:
[NSCharacterSet alphanumericCharacterSet]];
I am trying to create a percent encoded string in Swift so I can safely send text as a GET request. I found some Objective C code which I am trying to convert to Swift. I've written the following Swift code:
CFURLCreateStringByAddingPercentEscapes(nil,
CFStringRef(encodedString), nil,
CFStringRef("/%&=?$#+-~#<>|\\*,.()[]{}^!"),
kCFStringEncodingUTF8)
There is no kCFStringEncodingUTF8 in Swift ... If you right click the CFStringEncodings source you see there is a million things in there but no UTF8. I don't understand. How can I use the UTF8 string encoding in this situation?
EDIT : I found a way to encode a string but I still don't understand what happened to kCFStringEncodingUTF8
The UTF-8 string encoding is defined as
enum CFStringBuiltInEncodings : CFStringEncoding {
// ...
case UTF8 /* kTextEncodingUnicodeDefault + kUnicodeUTF8Format */
// ...
}
and can be used as
let orig = "a/b(c)"
let escaped = CFURLCreateStringByAddingPercentEscapes(nil, orig, nil,
"/%&=?$#+-~#<>|\\*,.()[]{}^!",
CFStringBuiltInEncodings.UTF8.rawValue)
println(escaped)
// a%2Fb%28c%29
As mentioned by #Zaph in a comment, stringByAddingPercentEncodingWithAllowedCharacters might
be easier to use:
let charset = NSCharacterSet(charactersInString: "/%&=?$#+-~#<>|\\*,.()[]{}^!").invertedSet
let escaped = orig.stringByAddingPercentEncodingWithAllowedCharacters(charset)
or use one of the pre-defined character sets from
Creating a Character Set for URL Encoding.
kCFStringEncodingUTF8 has been replace in Swift with: UTF8.
There is a new NSString method added in iOS7 that takes a character set and a number of specialized character sets have been added and of course you can create specialized character sets. There is very little reason to use CFURLCreateStringByAddingPercentEscapes any more. See this: SO Answer