iOS Chinese URL path conversion urlencode

Today found an egg ache problem, the server returned urlstring inside sometimes contain Chinese , use

[Nsurl Urlwithstring:urlstring] When the URL object is generated, the iOS Client does not make the network request correctly , and the UrlEncode method found on the Web does not completely solve the problem .

Method 1:

nsstring* encodedstring = [URLString stringbyaddingpercentescapesusingencoding:nsutf8stringencoding];

Method 2:

NSString * encodedstring = (NSString *) cfurlcreatestringbyaddingpercentescapes (Kcfallocatordefault, (CFSTRINGREF) URLSTRING,NULL,NULL,KCFSTRINGENCODINGUTF8);

These two methods are correct when the URLString contains Chinese , but if they contain symbols that are escaped, they are again escaped and cause an error .

View Method 2 parameter description :

Cfstringref Cfurlcreatestringbyaddingpercentescapes (cfallocatorref allocator, Cfstringref originalString, Cfstringref characterstoleaveunescaped, Cfstringref legalurlcharacterstobeescaped, CFStringEncoding encoding);

So make a change and write the method :

NSString *encodedstring = (NSString *) cfurlcreatestringbyaddingpercentescapes (Kcfallocatordefault,                                        ( CFSTRINGREF) urlstring,                                        (cfstringref)@ "!$&"() *+,-./:;[ Email protected]_~%#[]",                                        NULL,                                        kCFStringEncodingUTF8);

If this method is used in all classes, it can be written as category and then called in the header file import "nsstring+url.h" .

@interface nsstring (URL)   -(NSString *) urlencodedstring;   @end  

#import "nsstring+url.h"    @implementationnsstring (URL)-(NSString *) urlencodedstring {nsstring*encodedstring = (NSString *) Cfurlcreatestringbyaddingpercentescapes (Kcfallocatordefault, (CFSt Ringref) Self, (cfstringref)@"!$& ' () *+,-./:; [Email protected]_~%#[]", NULL, Kcfstringencodingutf      8); returnencodedstring; }  @end  

Call Method:

NSString *encodedstring = [URLString urlencodedstring];

EncodedString do something

iOS Chinese URL path conversion urlencode