用stringByAddingPercentEncodingWithAllowedCharacters取代CFURLCreateStringByAddingPercentEscapes

在
iOS 程序访问 HTTP 资源时需要对 URL 进行 Encode，比如像拼出来的 http://unmi.cc?p1=%+&sd
f&p2=中文，其中的中文、特殊符号&％和空格都必须进行转译才能正确访问。现在以"?!@#$^&%*+,:;='\"`<>()[]{}/\\| "字符串为例子，用stringByAddingPercentEncodingWithAllowedCharacters取代CFURLCreateStringByAddingPercentEscapes

原字符串为：

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<span style="font-family:SimSun;font-size:14px;">NSString *url = @"ertehtt""p://xxdsdscrg?!@#$^&%*+,:;='\"`<>()[]{}/\\| ";</span>  

CFURLCreateStringByAddingPercentEscapes方法为：

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<span style="font-family:SimSun;font-size:14px;">    CFStringRef encodedCFString = CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,  

                                                                            (__bridge CFStringRef) url,  

                                                                            nil,  

                                                                            CFSTR("?!@#$^&%*+,:;='\"`<>()[]{}/\\| "),  

                                                                            kCFStringEncodingUTF8);  

    NSString *encodedString1 = [[NSString alloc] initWithString:(__bridge_transfer NSString*) encodedCFString];</span>  

stringByAddingPercentEncodingWithAllowedCharacters方法为：

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NSString *charactersToEscape = @"?!@#$^&%*+,:;='\"`<>()[]{}/\\| ";  

NSCharacterSet *allowedCharacters = [[NSCharacterSet characterSetWithCharactersInString:charactersToEscape] invertedSet];  

NSString *encodedUrl = [url stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacters];  

NSLog(@"\n%@\n%@",encodedUrl,encodedString1);  

之后获得的字符串为一致的。

stringByAddingPercentEncodingWithAllowedCharacters

2015-12-12 16:10 本站整理 浏览(164)

stringByAddingPercentEncodingWithAllowedCharacters，有需要的朋友可以参考下。

（1） 网络访问请求：中文空格字符编码/解码

stringByAddingPercentEscapesUsingEncoding(只对 `#%^{}[]|\"<> 加空格共14个字符编码，不包括”&?”等符号), ios9将淘汰，建议用stringByAddingPercentEncodingWithAllowedCharacters方法

URLFragmentAllowedCharacterSet  "#%<>[\]^`{|}

URLHostAllowedCharacterSet      "#%/<>?@\^`{|}

URLPasswordAllowedCharacterSet  "#%/:<>?@[\]^`{|}

URLPathAllowedCharacterSet      "#%;<>?[\]^`{|}

URLQueryAllowedCharacterSet     "#%<>[\]^`{|}

URLUserAllowedCharacterSet      "#%/:<>?@[\]^`

（2）网络访问请求：中文空格字符解码

stringByRemovingPercentEncoding  ----  xcode7可能会提示要将stringByAddingPercentEscapesUsingEncoding替换成此方法，要根据是否是解码来区分

*/
//代替stringByAddingPercentEscapesUsingEncoding

let customAllowedSet =  NSCharacterSet(charactersInString:"`#%^{}\"[]|\\<> ").invertedSet

NSString * resourcePath = @"https://www.xiaocaobank.com";

NSString *encodePath ;

if (!IOS7_OR_LATER) {
encodePath = [resourcePath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}else{
encodePath = [resourcePath stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:@"`#%^{}\"[]|\\<> "].invertedSet];

}