xcode 来自 JSON 文件的 iOS 6 NSDictionary
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iOS 6 NSDictionary from JSON File
提问by gtr123
I am building a project using story boards and a MasterViewlayout. I'm trying to get the UITableViewdata from a JSON file (http://afterimagedesign.tk/topHits.jsonI don't know if this is correct JSON or not, I'm new) so I call these methods in viewDidLoad()
我正在使用故事板和MasterView布局构建一个项目。我正在尝试UITableView从 JSON 文件中获取数据（http://afterimagedesign.tk/topHits.json我不知道这是否是正确的 JSON，我是新手）所以我将这些方法称为viewDidLoad()
responseData = [[NSMutableData data] retain];
NSURLRequest *topHitsRequest = [NSURLRequest requestWithURL:[NSURLURLWithString:@"http://afterimagedesign.tk/topHits.json"]];
[[NSURLConnection alloc] initWithRequest:topHitsRequest delegate:self];
and then in connectionDidFinishLoading:(NSURLConnection *)connectionmethod, I call this:
然后在connectionDidFinishLoading:(NSURLConnection *)connection方法中，我称之为：
[connection release]
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
[responseData release];
NSDictionary *topHitsDictionary = [responseString JSONValue];
NSArray *topHitsArray = [topHitsDictionary valueForKey:@"title"];
The problem is (I think) that I get this error: "Instance method '-JSONValue' not found." I have looked for this for a while, and all of the tutorials I've seen use this method. Is it iOS 6 or something else? Thanks!
问题是（我认为）我收到此错误：“未找到实例方法‘-JSONValue’。” 我已经找了一段时间了，我看到的所有教程都使用这种方法。是 iOS 6 还是别的什么？谢谢！
EDIT:
编辑：
How do I add it to a UITableView? I tried cell.textLabel.text = [self.topKpop objectAtIndex:indexPath.row];but I keep getting a SIGABRT error. I have gotten SIGABRT error, but this time it's in the .m file.
如何将它添加到 UITableView？我试过了，cell.textLabel.text = [self.topKpop objectAtIndex:indexPath.row];但我一直收到 SIGABRT 错误。我收到了 SIGABRT 错误，但这次是在 .m 文件中。
回答by Andrew
I think the tutorials were using SBJsonor similar JSON parser frameworks.
我认为教程正在使用SBJson或类似的 JSON 解析器框架。
If you don't want to use any external frameworks, you can try JSONObjectWithData:options:error:from the NSJSONSerializationclass, which is available since iOS 5.0.
如果您不想使用任何外部框架，您可以JSONObjectWithData:options:error:从NSJSONSerialization类中尝试，该类自 iOS 5.0 起可用。
[connection release]
NSError *jsonError = nil;
NSDictionary *topHitsDictionary = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&jsonError];
NSArray *topHitsArray = [topHitsDictionary valueForKey:@"title"];
// ...
[responseData release];
