twitterでテキストを検索するiPhoneアプリの機能。コードは非常に簡単です、私は、TwitterのAPIにURL文字列を渡し、結果を解析します。 JSONパーサーはアンエスケープされた制御文字 '0x0'のエラーで半分の時間で失敗します。以下のコードと完全なエラーメッセージ。エスケープされていない制御文字の断続的なJSONパーサーエラー
- (void)grabData:(NSString *)searchTerm {
NSString *urlString = [NSString stringWithFormat:@"http://search.twitter.com/search.json?q=%@&rpp=25",searchTerm];
NSURL *url = [NSURL URLWithString:urlString];
NSLog(@"Created url:%@",url);
//Setup and start async download
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection release];
[request release];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
// Store incoming data into a string
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
//NSLog(@"Did receive some data %@",jsonString);
//Create a dictionary from the JSON string
NSDictionary *results = [jsonString JSONValue];
// Build an Array from the dictionary for easy access to each entry
NSDictionary *tweets = [results objectForKey:@"results"];
// Loop through each entry in the dictionary
for(NSDictionary *tweet in tweets) {
// Get the user string for the tweet
NSString *tUser = [tweet objectForKey:@"from_user"];
NSLog(@"Tweet from %@",tUser);
}
}
コンソールからのエラーメッセージ、50%の時間、他の50%は期待通りに動作します。
2010-12-20 21:22:02.022 TwitterSearch[47362:207] Created url:http://search.twitter.com/search.json?q=red&rpp=25
2010-12-20 21:22:02.361 TwitterSearch[47362:207] -JSONValue failed. Error trace is: (
"Error Domain=org.brautaset.JSON.ErrorDomain Code=5 \"Unescaped control character '0x0'\" UserInfo=0x4d6a130 {NSLocalizedDescription=Unescaped control character '0x0'}",
"Error Domain=org.brautaset.JSON.ErrorDomain Code=3 \"Object value expected for key: profile_image_url\" UserInfo=0x4d6a200 {NSUnderlyingError=0x4d6a170 \"Unescaped control character '0x0'\", NSLocalizedDescription=Object value expected for key: profile_image_url}",
"Error Domain=org.brautaset.JSON.ErrorDomain Code=3 \"Expected value while parsing array\" UserInfo=0x4d6a240 {NSUnderlyingError=0x4d6a1e0 \"Object value expected for key: profile_image_url\", NSLocalizedDescription=Expected value while parsing array}",
"Error Domain=org.brautaset.JSON.ErrorDomain Code=3 \"Object value expected for key: results\" UserInfo=0x4d6a310 {NSUnderlyingError=0x4d6a2d0 \"Expected value while parsing array\", NSLocalizedDescription=Object value expected for key: results}"
)
JSONが失敗したときの外観は何ですか? –