NSJSONSerialization - 无法将数据转换为字符串

Mat*_*ice 9 cocoa-touch json web-services objective-c ios

我遇到了从Met Office Datapoint API读取JSON的NSJSONSerialization的问题.

我收到以下错误

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Unable to convert data to string around character 58208.
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我已根据角色位置检查并认为这是违规行

{"id":"353556","latitude":"57.1893","longitude":"-5.0929","name":"Sóil Chaorainn"}
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根据我尝试的几个验证器,JSON本身似乎是有效的,我希望它也来自像Met Office这样的大型组织.

NSJSONSerialization不应该与'ó'这样的字符一起使用吗?

如果不是我如何改变编码类型来处理这个?

提前谢谢了

Eri*_*net 21

Met Office Datapoint发回ISO-8859-1中的数据,这不是NSJSONSerialization支持的数据格式之一.

要使其工作,首先使用NSISOLatin1StringEncoding从URL内容创建一个字符串,然后使用NSUTF8编码创建要在NSJSONSerialization中使用的NSData.

以下工作来创建相应的json对象

NSError *error;
NSString *string = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://datapoint.metoffice.gov.uk/public/data/val/wxfcs/all/json/sitelist?key=<YOUR_API_KEY"] encoding:NSISOLatin1StringEncoding error:&error];

NSData *metOfficeData = [string dataUsingEncoding:NSUTF8StringEncoding];

id jsonObject = [NSJSONSerialization JSONObjectWithData:metOfficeData options:kNilOptions error:&error];

if (error) {
    //Error handling
} else {
    //use your json object
    NSDictionary *locations = [jsonObject objectForKey:@"Locations"];
    NSArray *location = [locations objectForKey:@"Location"];
    NSLog(@"Received %d locations from the DataPoint", [location count]);
}
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