iOS 开发中，经常需要对url编码与解码。
iOS9之前
1.url编码
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| + (NSString*)encodeUrl:(NSString *)urlString {
if (0 == urlString.length) {
return KBlankString;
}
return (__bridge_transfer NSString*) CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
(CFStringRef)urlString,
NULL,
(CFStringRef)@"!*'();:@&=+$,/?%#[]",
kCFStringEncodingUTF8);
}
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2.url解码
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| + (NSString *)decodeUrl:(NSString *)urlString {
if (0 == urlString.length) {
return KBlankString;
}
return (__bridge_transfer NSString*) CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault,
(__bridge CFStringRef)urlString,
CFSTR(""),kCFStringEncodingUTF8);
}
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iOS7之后。
1.url编码
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| + (NSString *)URLEncode:(NSString *)urlString {
if (0 == urlString.length) {
return KBlankString;
}
return [urlString stringByAddingPercentEncodingWithAllowedCharacters:[self URLEncodeCharSet]];
}
static NSCharacterSet *_sharedCharacterSet = nil;
+ (NSCharacterSet *)URLEncodeCharSet {
if (nil == _sharedCharacterSet) {
_sharedCharacterSet = [[NSCharacterSet characterSetWithCharactersInString:@"!*'();:@&=+$,/?%#[]"] invertedSet];
}
return _sharedCharacterSet;
}
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2.url解码
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| + (NSString *)URLDecode:(NSString *)urlString {
if (0 == urlString.length) {
return KBlankString;
}
return [urlString stringByRemovingPercentEncoding];
}
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