我正在尝试获取 Twitter 提要。我正在使用这个网址
https://twitter.com/status/user_timeline/wwwkrcgenkbe.json?count=25&from=wwwkrcgenkbe
此 url 提供以下 JSON 格式
[
{
"place": null,
"retweeted": false,
"in_reply_to_status_id_str": null,
"in_reply_to_screen_name": null,
"possibly_sensitive": false,
"in_reply_to_status_id": null,
"truncated": false,
"in_reply_to_user_id_str": null,
"user": { … },
"in_reply_to_user_id": null,
"contributors": null,
"coordinates": null,
"retweet_count": 0,
"favorited": false,
"created_at": "Tue Oct 09 08:54:53 +0000 2012",
"geo": null,
"source": "<a href=\"http://www.facebook.com/twitter\" rel=\"nofollow\">Facebook</a>",
"id_str": "255592155345727489",
"id": 255592155345727500,
"possibly_sensitive_editable": true,
"text": "Vorige week won Nele Vangeneugden het shirtje dat Jelle Vossen droeg in de Europa League wedstrijd tegen... http://t.co/mwxSsBLP"
},
我正在按照以下方式进行操作。首先我添加这个方法。
for (NSDictionary *genkInfo in tweets ) {
NSLog(@"Komt in deze methode");
[Twitter twitterWithGenkInfo:genkInfo inManagedObjectContext:document.managedObjectContext];
NSLog(@"tweets: %@", tweets);
}
然后我以这种方式将值存储在我的核心数据数据库中。
+ (Twitter *)twitterWithGenkInfo:(NSDictionary *)genkInfo
inManagedObjectContext:(NSManagedObjectContext *)context
{
NSLog(@"till here");
Twitter *twitter= nil;
NSLog(@"till here 2");
twitter = [NSEntityDescription insertNewObjectForEntityForName:@"Twitter"
inManagedObjectContext:context];
NSLog(@"tille here3");
twitter.tweet = [genkInfo objectForKey:TWITTER_TWEET];
twitter.date = [genkInfo objectForKey:TWITTER_DATE];
NSLog(@"till here 4");
NSLog(@"tweet is: %@",twitter.tweet);
NSLog(@"date is: %@",twitter.date);
return twitter;
}
此方法在我的视图控制器中以下列方式调用。
NSArray *tweets = [GenkData getTweets];
for (NSDictionary *genkInfo in tweets ) {
NSLog(@"Komt in deze methode");
[Twitter twitterWithGenkInfo:genkInfo inManagedObjectContext:document.managedObjectContext];
}
但我总是遇到这个错误。
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull objectForKey:]: unrecognized selector sent to instance 0x2751678'
有人可以帮忙吗？
提前致谢！
日志文件
Log is: (
{
contributors = "<null>";
coordinates = "<null>";
"created_at" = "Tue Oct 09 12:53:08 +0000 2012";
favorited = 0;
geo = "<null>";
id = 255652115341508608;
"id_str" = 255652115341508608;
"in_reply_to_screen_name" = "<null>";
"in_reply_to_status_id" = "<null>";
"in_reply_to_status_id_str" = "<null>";
"in_reply_to_user_id" = "<null>";
"in_reply_to_user_id_str" = "<null>";
place = "<null>";
"possibly_sensitive" = 0;
"possibly_sensitive_editable" = 1;
"retweet_count" = 0;
retweeted = 0;
source = "<a href=\"http://www.facebook.com/twitter\" rel=\"nofollow\">Facebook</a>";
text = "KRC Genk mobile: de Iphone APP (al meer dan 1 mnd beschikbaar) werd reeds 2226 keer gedownload, de Android APP... http://t.co/QidTcLJS";
truncated = 0;
user = {
"contributors_enabled" = 0;
"created_at" = "Fri Nov 20 18:57:28 +0000 2009";
"default_profile" = 0;
"default_profile_image" = 0;
description = "The official twitter account from Belgian Soccer team KRC Genk. Belgium champions 2011. Qualified for UEFA Euro League 2012-2013.";
"favourites_count" = 1;
"follow_request_sent" = "<null>";
"followers_count" = 4831;
following = "<null>";
"friends_count" = 21;
"geo_enabled" = 0;
id = 91402003;
"id_str" = 91402003;
"is_translator" = 0;
lang = en;
"listed_count" = 94;
location = "Genk - Belgium";
name = "KRC Genk";
notifications = "<null>";
"profile_background_color" = C0DEED;
"profile_background_image_url" = "http://a0.twimg.com/profile_background_images/84123014/youtubebg.jpg";
"profile_background_image_url_https" = "https://si0.twimg.com/profile_background_images/84123014/youtubebg.jpg";
"profile_background_tile" = 0;
"profile_image_url" = "http://a0.twimg.com/profile_images/654317237/twitter_thumb_normal.jpg";
"profile_image_url_https" = "https://si0.twimg.com/profile_images/654317237/twitter_thumb_normal.jpg";
"profile_link_color" = 0084B4;
"profile_sidebar_border_color" = C0DEED;
"profile_sidebar_fill_color" = DDEEF6;
"profile_text_color" = 333333;
"profile_use_background_image" = 1;
protected = 0;
"screen_name" = wwwkrcgenkbe;
"statuses_count" = 4230;
"time_zone" = "<null>";
url = "http://www.krcgenk.be";
"utc_offset" = "<null>";
verified = 0;
};
},
-[__NSCFNumber managedObjectContext]: unrecognized selector sent to instance 0x9331b40