iPhone，来自 utf8 xml 的字符串，字符错误

Question

我必须显示包含在我从网络上获取的 xml 文件中的文本。文件开头为：

...

然后是文本节点，这样写：

这是很好的 utf-8 格式文本吗？

我已经尝试了所有这些，但仍然无法将“Ô替换为“à”和“è”替换为“è”：

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];

有什么建议吗？ 谢谢。

Answer 1

无法从您的问题中判断 CDATA 部分是否正确 UTF-8 编码。由于编码数据是二进制数据，您需要发布二进制数据（即以十六进制表示）而不是一些文本。

此外，您的所有代码示例都依赖于以正确编码存储的源代码文件，这同样无法从您的问题中确定。

我建议你使用一个像样的 XML 解析器来解析 XML 数据，比如内置的 NSXMLParser 类。当它遇到 CDATA 部分时，它将调用您的委托并将文本作为 UTF-8 编码的二进制数据传递，无论原始编码是什么。然后您可以将其转换为字符串：

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

    // do something with the text...
}

并确保您将 XML 文件作为二进制数据检索，并将其作为 XML 数据传递给 XML 解析器。否则，您将有不必要的解码和编码，并且您可能会损坏编码。

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];

NSURLConnection *conn_InvEdit = [[NSURLConnection alloc] initWithRequest:请求 委托：自己];

// 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

...

像这样添加标签

...

并使用

[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

and [request setValue:[NSString stringWithFormat:@"%d", [json_data length]] forHTTPHeaderField:@"Content-Length"]; [请求 setHTTPBody:[[jsonRequest stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding] dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES]];