NSCFString objectForKey無法識別的選擇器發送到實例

//initialize the people data list 
- (void)initializePeopleListFromJson:(CLLocationCoordinate2D)coordinate auraId:(NSString *)auraId 
{ 

//initialize the NSMutableArray list 
self.peopleList = [[NSMutableArray alloc] init]; 

//retrieve the coordinate of myself 
//NSString *myCoordinate = [NSString stringWithFormat:@"%f,%f", coordinate.latitude, coordinate.longitude]; 
NSString *myCoordinate = @"31.2,121.6"; 

NSString *url = [NSString stringWithFormat:@"%@%@%@%@", @"http://services.portaura.mobi/AuraMesh/auraFinder/findPeoples?ll=", myCoordinate, @"&source=tencent,netease,kaixin&myAuraId=", auraId]; 

NSLog(@"*********** %@", url); 

//retrieve the people list from web service 
NSDictionary* result = [NSDictionary dictionaryWithContentsOfJSONURLString:url]; 
NSArray *peopleListFromJson = [result objectForKey:@"data"];

// NSLog（@「peopleList：％@」，peopleListFromJson）;NSCFString objectForKey無法識別的選擇器發送到實例

People *people; 
UserProfile *userProfile; 
NSDictionary *geoFromJson; 
NSDictionary *profileFromJson; 



for (NSDictionary *peopleFromJson in peopleListFromJson) 
{ 

    people = [[People alloc] init]; 
    userProfile = [[UserProfile alloc] init]; 

    people.foreignId = [peopleFromJson objectForKey:@"foreignId"]; 
    people.id1 = [peopleFromJson objectForKey:@"id"]; 
    people.isFavorited = [peopleFromJson objectForKey:@"isFavorited"]; 
    people.lastActiveTime = [peopleFromJson objectForKey:@"lastActiveTime"]; 
    people.lastActivity = [peopleFromJson objectForKey:@"lastActivity"]; 
    people.lastPlace = [peopleFromJson objectForKey:@"lastPlace"]; 
    people.source = [peopleFromJson objectForKey:@"source"]; 

    NSLog(@"AAAAAAAA %@", [peopleFromJson objectForKey:@"foreignId"]); 


    //process geo 
    geoFromJson = [[NSDictionary alloc] init]; 
    geoFromJson = [peopleFromJson objectForKey:@"geo"]; 

    CLLocationCoordinate2D coordinate; 
    coordinate.latitude = [[geoFromJson objectForKey:@"lat"] floatValue]; 
    coordinate.longitude = [[geoFromJson objectForKey:@"lng"] floatValue]; 

    people.geo = coordinate; 
    people.distance = [geoFromJson objectForKey:@"distance"]; 


    //process profile 
    profileFromJson = [[NSDictionary alloc] init]; 
    profileFromJson = [peopleFromJson objectForKey:@"profile"]; 

    people.avatar = [profileFromJson objectForKey:@"avatar"]; 
    people.gender = [profileFromJson objectForKey:@"gender"]; 
    people.location = [profileFromJson objectForKey:@"location"]; 
    people.screenName = [profileFromJson objectForKey:@"screenName"]; 
    people.signature = [profileFromJson objectForKey:@"sigunature"]; 

    //people.userProfile = userProfile; 
    [self addPeople:people]; 

}

}

it give me the [__NSCFString objectForKey:]: unrecognized selector sent to instance 0x1808d0,can you give some advice

JSON像：

{ 「狀態」：0 「數據」：{ 「清單」：[{ 「foreignId」：「8827857641648129226」，「地理「：{」距離「：1359，」 LAT 「：31.20926508184017，」 LNG 「：121.59068046014856}，」 ID 「：」 netease_8827857641648129226" ，「isFavorited」：假「lastActiveTime」：「2012-05-19T20：26：47Z 「，」lastActivity「：」http://126.fm/kFEKl「，」lastPlace「：」「，」profile「 HTTP％ 3A％2F％2Fmimg.126.net％2FP％2Fbutter％2F1008031648％2Fimg％2Fface_big.gif」，「性別」：0，「位置」：「」，「屏幕名」：「4671784460」，「sigunature」：「」，「tags」：[]}，「source」：「netease」} ......

來源

2012-06-21 pengwang

最有可能的'profileFromJson = [peopleFromJson objectForKey：@ 「檔案」];'返回的NSString，而不是一個的NSDictionary ....請問在JSON真的看？ –

我是一個新的iOS開發人員，我正在修改其他人的代碼。謝謝 – pengwang

我認爲你總是不對，因爲依賴於JSON，有時候正確的是NSDictionary。有時是NSString。 – pengwang

檢查你的變量類peopleFromJson它在你調用objectForKey時可能不是字典。

把這個語句作爲第一行烏爾for環
NSLog(@"%@",NSStringFromClass([peopleFromJson class]));

來源

2012-06-21 06:02:48 samfisher

你是對的，peopleFromJson不是一個NSDictionary，你可以給其他搜索鍵來幫助我解決問題。和JSON的鏈接還可以謝謝你 – pengwang

我已經解決了這個問題，我不能認爲這個問題是容易的，也許有些人只知道原因是該對象的NSString不NSDir，但真正的問題是取決於JSON「風格」，有時我的代碼是正確的，但對於其他JSON是不正確的，例如我的問題JSON。所以解決的問題是：

if (![peopleListFromJson isKindOfClass:[NSArray class]] && peopleListFromJson!=nil) { 
    peopleListFromJson =[NSArray arrayWithObject:peopleListFromJson]; 
} 

because i used 
NSDictionary* result = [NSDictionary dictionaryWithContentsOfJSONURLString:url]; 
NSArray *peopleListFromJson = [result valueForKeyPath:@"data.list"]; 
so peopleListFromJson!=nil is impotent

來源

2012-06-21 08:14:26 pengwang

NSCFString objectForKey無法識別的選擇器發送到實例

回答

相關問題