iPhone，从UTF8 XML字符串错误的字符

Question

我要显示包含到一个XML文件，我从网上获取文本。该文件的开头为：？

< XML版本= “1.0” 编码= “UTF-8”>

...再有就是文本节点，这样写的：？

<文本> <！[CDATA [然而，北部城市，与弹簧征服小时光照，或岛屿，复活节是在仪式仍然tempo.Pasqua忠实的魅力是PE的机会... ]]> < /文本>

这是很好的UTF-8格式的文本？

我已经尝试了所有的这一点，但仍无法与“一”和“这”与“是”替换“它”：

text = ^the string from above^ 
NSData* data_text = [text dataUsingEncoding:NSUTF8StringEncoding]; 
NSString* text_c3 = [[NSString alloc] initWithBytes:[data_text bytes] length:[data_text length] encoding:NSUTF8StringEncoding]; 

const char* utfstring = "E ancora, il fascino delle città del nord,";// [text UTF8String]; 
NSString* text_c1 = [[NSString alloc] initWithUTF8String:utfstring]; 
NSString* text_converted = [NSString stringWithCString:utfstring encoding:NSUTF8StringEncoding]; 

有什么建议？ 感谢。

Answer 1

这是不可能从你的问题告诉无论CDATA部分是正确的UTF-8编码。由于数据是编码的二进制数据，你就必须按二进制数据（即，以十六进制表示），而不是一些文本。

此外，所有的代码示例依赖于源代码文件存储与正确的编码，这也无法从你的问题来确定。

我建议你使用一个体面的XML解析器解析XML数据，如内置的NSXMLParser类。当遇到CDATA部分，它会调用你的委托，并通过文本作为二进制数据在UTF-8编码，不管什么原始编码了。然后，您可以将其转换成字符串：

- (void)parser:(NSXMLParser *)parser foundCDATA:(NSData *)cdataBlock 
{ 
    NSString *text = [NSString stringWithUTF8String: [cdataBlock bytes]]; 

    // do something with the text... 
} 

并确保您检索XML文件作为二进制数据，并将其传递给XML解析器作为XML数据。如果没有，你将有不必要的decodings和编码，你很可能会损坏编码。

Answer 2

NSURL * URL = [NSURL URLWithString：@ “http://www.yourURL.com”];

//NSString *jsonRequest = [NSString stringWithFormat:@"&json_data=%@",[[NSString stringWithFormat:@"{\"createInvoice\":{\"client_id\":\"%@\",\"address\":\"\",\"invoice_title\":\"%@\",\"number\":\"\",\"date\":\"%@\",\"due_date\":\"%@\",\"late_fee\":\"\",\"schedule_date\":\"%@\",\"po_number\":\"\",\"status\":\"paid\",\"notes\":\"invoice notes\",\"terms\":\"invoice terms\",\"items\":[{\"name\":\"Test4\",\"type\":\"Product\",\"description\":\"\",\"unit_cost\":\"15\",\"quantity\":\"100\",\"discount\":\"10\",\"discount_type\":\"Percent\",\"tax1_name\":\"\",\"tax1_type\":\"\",\"tax2_name\":\"\",\"tax2_type\":\"\",\"tax1_percent\":\"\",\"tax2_percent\":\"\"}]}}",selected_Client_ID,invoiceTitleTxtFld.text,invoiveDateTxtFld.text,invoiceDueDateTxtFld.text,scheduleOnTxtFld.text] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 



NSString *jsonRequest = [NSString stringWithFormat:@"&json_data=%@",[[NSString stringWithFormat:@"{\"updateInvoice\":{\"invoice_id\":\"%@\",\"client_id\":\"60105\",\"address\":\"ABS\",\"invoice_title\": \"%@\",\"number\":\"inv-7774 new\",\"date\":\"2012-03-30\",\"due_date\":\"2012-04-30\",\"late_fee\":\"\",\"schedule_date\":\"2012-03-31\",\"po_number\":\"PO-7770\",\"status\":\"paid\",\"notes\":\"invoice notes\",\"terms\":\"invoice terms\",\"items\":[{\"name\":\"Test4\",\"type\":\"Product\",\"description\":\"Test4 desc\",\"unit_cost\":\"15\",\"quantity\":\"100\",\"discount\":\"10\",\"discount_type\":\"Percent\",\"tax1_name\":\"\",\"tax1_type\":\"\",\"tax2_name\":\"\",\"tax2_type\":\"\",\"tax1_percent\":\"\",\"tax2_percent\":\"\"}]}}",delegate.invoice_ID,invoiceTitleTxtFld.text] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 


NSData *json_data = [NSData dataWithBytes:[jsonRequest UTF8String] length:[jsonRequest length]]; 

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url]; 


[request setHTTPMethod:@"POST"]; 
[request setHTTPBody: json_data]; 
NSLog(@"%@",json_data); 
//[request setValue:@"application/json" forHTTPHeaderField:@"Accept"]; 
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; 
//[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; 
[request setValue:[NSString stringWithFormat:@"%d", [json_data length]] forHTTPHeaderField:@"Content-Length"]; 
[request setHTTPBody:[[jsonRequest stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding] 
         dataUsingEncoding:NSUTF8StringEncoding 
         allowLossyConversion:YES]]; 

// [NSURLConnection connectionWithRequest:[request autorelease] delegate:self]; 

NSUrlsConnection conn_InvEdit * = [[NSURLConnection的页头] initWithRequest：请求 委托：自我];

// Successful connection. 
if (conn_InvEdit) { 

    // [self initSpinner]; 
    // [self spinBegin]; 

    NSMutableData *data = [[NSMutableData alloc] init]; 
    self.receivedData=data; 
    [data release]; 
} 
// Unsuccessful connection. 
else { 

} 
// Clean up 
[url release]; 
[request release]; 
// Close keypad. 

Try with this code, If you still have any problem then send me your complete question at akram.khan@mail.vinove.com. I'll send you sample app with solution. 

Answer 3

...

添加标签这样

...

并使用

[请求的setValue：@ “应用程序/ x WWW的形式进行了urlencoded” forHTTPHeaderField：@ “内容类型”]; HTTP请求setValue：[NSString stringWithFormat：@“％d”，[json_data length]] forHTTPHeaderField：@“Content-Length”]; [请求setHTTPBody：[[jsonRequest stringByAddingPercentEscapesUsingEncoding：NSASCIIStringEncoding] dataUsingEncoding：NSUTF8StringEncoding allowLossyConversion：YES]];