Question

编写iphone应用程序，我从返回JSON的REST API获取数据。我的问题是，一些数据嵌入了特殊字符，我得到错误。例如：

MartÌn
Petite-RiviËre-Saint-FranÁois

这是我目前的代码：

NSString *jsonString = [[NSString alloc] 
                            initWithData:receivedData 
                            encoding:NSUTF8StringEncoding];
NSMutableArray *tempResults = [[[jsonString JSONValue] 
                            objectForKey:@"getRegionResortsLastUpdatedResponse"] 
                            objectForKey:@"return"];

每当数据中有特殊字符时，“jsonString”返回“（null）”，否则一切正常。

这是我可以处理的事情，还是需要修改API以输出字符代码？

Answer 1

如果-initWithData:encoding:返回nil，则您的数据几乎肯定不会按请求的编码进行编码。我怀疑你没有发送UTF8，而是发送一些其他编码，例如Windows代码页或Latin1之一。请参阅NSString documentation。

中的字符串编码

Answer 2

使用以下函数对我执行此操作的代码进行编码，并且完美地为我工作....

+ (NSData*) resolveXmlSpecialEntities:(NSData*)xmlData
{
    if (xmlData == nil) 
        return nil;
    if ([xmlData length] == 0)
        return xmlData;

    NSMutableString* xmlString = [[NSMutableString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding];
    [xmlString replaceOccurrencesOfString:@"&amp;quot;" withString:@"\"" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;" withString:@"##??##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&gt;" withString:@"##?!##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;br&gt;" withString:@"##br##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;/br&gt;" withString:@"##/br##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;b&gt;" withString:@"##b##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;/b&gt;" withString:@"##/b##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;center&gt;" withString:@"##center##"options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&lt;/center&gt;" withString:@"##/center##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"##??##![CDATA[" withString:@"" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"]]##?!##" withString:@"" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"&amp;" withString:@"##ampersand##" options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];
    [xmlString replaceOccurrencesOfString:@"##ampersand##nbsp;" withString:@" " options:NSLiteralSearch range:NSMakeRange(0, [xmlString length])];

    xmlData = [xmlString dataUsingEncoding:NSUTF8StringEncoding];
    [xmlString release];
    return xmlData;
}

+ (NSString*) stringByRemovingResolversInXmlString:(NSString*)xmlString
{
    NSMutableString* stringToChange = [NSMutableString stringWithString:xmlString];

    [stringToChange replaceOccurrencesOfString:@"##??##" withString:@"<" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##?!##" withString:@">" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##br##" withString:@"<br>" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##/br##" withString:@"</br>" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##b##" withString:@"<b>" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##/b##" withString:@"</b>" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##center##" withString:@"<center>"options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##/center##" withString:@"</center>" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];
    [stringToChange replaceOccurrencesOfString:@"##ampersand##" withString:@"&" options:NSLiteralSearch range:NSMakeRange(0, [stringToChange length])];

    return [NSString stringWithString:stringToChange];
}

iPhone，JSON Response中的特殊字符

2 个答案: