[英]iOS objective-C NSData to NSString return nil, how to ignore the invalid UTF-8
[英]Objective-C: NSString not being entirely decoded from UTF-8
我正在查詢Web服務器,該服務器返回JSON字符串作為NSData
。 該字符串采用UTF-8格式,因此將其轉換為NSString
如下所示。
NSString *receivedString = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding];
但是,某些utf-8轉義符仍保留在輸出的JSON字符串中,這導致我的應用程序行為異常。 \’
之類的\’
仍保留在字符串中。 我已經嘗試了所有方法來刪除它們,並用它們的實際字符替換它們。
我唯一能想到的就是用他們的角色手動替換UTF-8轉義符的出現,但是如果有一種更快的方法,這將是很多工作!
這是一個錯誤解析的字符串的示例:
{"title":"The Concept, Framed, The Enquiry, Delilah\u2019s Number 10 ","url":"http://livebrum.co.uk/2012/05/31/the-concept-framed-the-enquiry-delilah\u2019s-number-10","date_range":"31 May 2012","description":"","venue":{"title":"O2 Academy 3 ","url":"http://livebrum.co.uk/venues/o2-academy-3"}
如您所見,URL尚未完全轉換。
謝謝,
\’
語法不是UTF-8編碼的一部分,它是JSON特定語法的一部分。 NSString
解析UTF-8,而不是JSON,因此無法理解。
您應該使用NSJSONSerialization
解析JSON,然后從輸出中提取所需的字符串。
所以,例如:
NSError *error = nil;
id rootObject = [NSJSONSerialization
JSONObjectWithData:receivedData
options:0
error:&error];
if(error)
{
// error path here
}
// really you'd validate this properly, but this is just
// an example so I'm going to assume:
//
// (1) the root object is a dictionary;
// (2) it has a string in it named 'url'
//
// (technically this code will work not matter what the type
// of the url object as written, but if you carry forward assuming
// a string then you could be in trouble)
NSDictionary *rootDictionary = rootObject;
NSString *url = [rootDictionary objectForKey:@"url"];
NSLog(@"URL was: %@", url);
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