Example of encoding and decoding URLs in IOS _ios

Source: Internet
Author: User

This article mainly introduces the iOS in the encoding and decoding of the URL examples, specifically as follows:

1. Non-arc mode

+ (NSString *) encodetopercentescapestring: (NSString *) input {//Encode all reserved characters, per RFC 3986 ()

NSString *outputstr = (NSString *) cfurlcreatestringbyaddingpercentescapes (Kcfallocatordefault, CFSTRINGREF) Input,null, (cfstringref) @ "!* ' ();: @&=+$,/?%#[]",


return outputstr;


+ (NSString *) decodefrompercentescapestring: (NSString *) input {

nsmutablestring *outputstr = [nsmutablestring Stringwithstring:input];

[Outputstr replaceoccurrencesofstring:@ + "

withstring:@" "


Range: Nsmakerange (0, [outputstr length])];

return [Outputstr stringbyreplacingpercentescapesusingencoding:nsutf8stringencoding];

2. Arc mode

-(NSString *) encodetopercentescapestring: (NSString *) input{  nsstring* outputstr 
= (__bridge NSString *) Cfurlcreatestringbyaddingpercentescapes (

                       null,/* Allocator * *

                       (__bridge cfstringref) input,

                       null,/* characterstoleaveunescaped * *

                       (CFSTRINGREF) @ "!* ' ();: @&=+$,/?%#[]",

 Outputstr;} -(NSString *) decodefrompercentescapestring: (NSString *) input
{nsmutablestring *outputstr = [nsmutablestring Stringwithstring:input]; [Outputstr replaceoccurrencesofstring:@ "+" withstring:@ "
" Options:NSLiteralSearchrange:NSMakeRange (0,
 [Outputstr length])]; return
 [Outputstr stringbyreplacingpercentescapesusingencoding:nsutf8stringencoding];}

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