标签: nsjsonserialization

我使用NSJSONSerialization's JSONObjectWithData:data options: error:来解析从服务器返回的JSON数据.

现在我使用的选项参数:NSJSONReadingAllowFragments.您可以在下面查看实际的JSON(我认为问题出在哪里).

我得到的错误信息是:

错误域= NSCocoaErrorDomain代码= 3840"操作无法完成.(Cocoa错误3840.)"(字符0周围的值无效.)UserInfo = 0x6895da0 {NSDebugDescription =字符0周围的值无效}

知道怎么解决吗？

JSON =

{"name":"Johan Appleseed",
"email":"j.appleseed@emuze.co",
"phone":"+4121876003",
"accounts":{
    "facebook":[true,1125],
    "twitter":[false,null],
    "homepage":[true,"http:\/\/johnAplleseed.com\/index.html"]}}

我正在使用NSJSONSerialization将json字符串转换为NSDictionaray

JSON字符串是

{"bid":88.667,"ask":88.704}

在NSJSONSerialization之后

{
    ask = "88.70399999999999";
    bid = "88.667";
}

有人知道这个问题吗？

我想将NSDictionary转换为json string.everything工作正常,我有一个小问题,描述如下:我有一个以下代码将NSDictionary转换为NSString:

-(NSString *)dictToJson:(NSDictionary *)dict
{
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil];
   return  [[NSString alloc] initWithBytes:[jsonData bytes] length:[jsonData length] encoding:NSUTF8StringEncoding];
}

我将该方法称为:

NSLog(@"%@", [self dictToJson:@{@"hello" : @"21/11/2014 10:07:42 AM"}]);

以下是此NSLog的输出:

{
  "hello" : "21\/11\/2014 10:07:42 AM"
}

我期待以下输出,我怎样才能实现它:

{
      "hello" : "21/11/2014 10:07:42 AM"
}

它可以通过使用stringByReplacingOccurrencesOfString方法来完成,但我不想使用它.还有其他方法可以达到同样的目的吗？

当我将数据从Web服务转换为NSDictionary时,我陷入困境.但是当在调试模式下访问控制台时,它会返回,而当我将字典的值与视图绑定时,它可以完美地工作.以下是代码: -

NSDictionary *responseDict =  [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&e];

在控制台我使用po [dictName valueForKey:@"Status"]以及po [dictName objectForKey:@"Status"].遵循几个步骤,但对我不起作用1.在此模式下将优化级别设置为none.2.在此模式下已编程调试模式.

目前我正在编写一个应用程序(目标iOS 6,启用了ARC),它使用JSON进行数据传输,使用Core Data进行持久存储.JSON数据由PHP脚本通过json_encode从MySQL数据库生成.

我的问题是,对于某些表中的数据,以下代码失败:

- (NSDictionary *)executeFetch:(NSString *)query
{
    NSURL *requesturl = [NSURL URLWithString:[query stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    NSError *dataError = nil;
    self.jsonData = [NSData dataWithContentsOfURL:requesturl options:kNilOptions error:&dataError];

    NSError *error = nil;
    self.jsonSerializationResult = [NSJSONSerialization JSONObjectWithData:self.jsonData options:NSJSONReadingMutableContainers|NSJSONReadingMutableLeaves error:&error];

    return self.jsonSerializationResult;

}

该程序总是在EXC_BAD_ACCESS错误的位置崩溃,它表示self.jsonSerializationResult和Instruments说有一个Zombie被检测到.我知道这意味着我发送消息的一些对象是零,但我无法找到如何解决它...这就是乐器所说的:

#   Address Category    Event Type  RefCt   Timestamp   Size    Responsible Library Responsible Caller
0   0xa1b8a70   CFString (mutable)  Malloc  1   00:01.603.081   32  Foundation  -[NSPlaceholderMutableString initWithBytesNoCopy:length:encoding:freeWhenDone:]
1   0xa1b8a70   CFString (mutable)  Release 0   00:01.603.137   0   Foundation  newJSONValue
2   0xa1b8a70   CFString (mutable)  Zombie  -1  00:01.603.259   0 …

我试图解析一个ios 6应用程序的JSON,但似乎无法让它工作.我已经搜索了大量的论坛,但没有找到一个有效的解决方案,我理解足以实现,或者适用.

如果有一个我错过了,我道歉.

首先,我有一个测试WebService,据我所知,返回有效的JSON

http://thetrouthunter.com/SVLocationsAPI.php

其次,这是我的Objective-C代码:

+ (NSDictionary *)connectToService:(NSString *)query
{
    NSError *error = nil;

    query = [NSString stringWithFormat:@"%@&format=json&nojsoncallback=1", query];
    query = [query stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSData *jsonData = [[NSString stringWithContentsOfURL:[NSURL URLWithString:query] encoding:NSUTF8StringEncoding error:nil] dataUsingEncoding:NSUTF8StringEncoding];

    NSDictionary *results = jsonData ? [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers|NSJSONReadingMutableLeaves error:&error] : nil;

    NSLog(@"locations: %@", results);

    if (error)
        NSLog(@"[%@ %@] JSON error: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), error.localizedDescription);

    return results;
}

+ (NSArray *)userLocation {
    NSString *request = [NSString stringWithFormat:@"http://thetrouthunter.com/SVLocationsAPI.php"];
    return [[self connectToService:request] valueForKeyPath:@"locations.location"];
}

ls NSLog函数打印出错误:"操作无法完成.(可可错误:3840.)"

我无法弄清楚为什么会这样.我尝试过各种各样的事情.

使用Xcode 5.0升级到UrbanAirship 3.0.0,调用此代码时收到错误:

[UAirship takeOff:config];

错误是

+[NSJSONSerialization stringWithObject:]: unrecognized selector sent to class 0x3b2ca9fc
2013-09-19 15:02:31.981 [178:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[NSJSONSerialization stringWithObject:]: unrecognized selector sent to class 0x3b2ca9fc'

当将"inProduction"键设置为"YES"时似乎没有出现这种情况AirshipConfig.plist,这有意义,因为调用takeOff:填充UAirShip的实例.这似乎是由于类别NSJSONSerialization+UAAdditions.

对此有何帮助？谢谢

我从我的服务器上获取了一个有效的响应:

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    // Append the new data to the instance variable you declared


    //[_responseData appendData:data];

    NSString *responseBody = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"%@",responseBody);

    if(data != NULL)
    {
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,
                                                 (unsigned long)NULL), ^(void) {

        NSError *error = nil;
        //NSMutableArray *jsonArray = [[CJSONDeserializer deserializer] deserializeAsArray:[responseBody dataUsingEncoding:NSUTF8StringEncoding] error:&error];
            NSMutableArray *jsonArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
        if (error)
        {
            NSLog(@"JSONObjectWithData error: %@", error);
            [delegate onErrorGetArrayFromServer];
        }
        else
        [self parseJSON:jsonArray];

        });

    }
    else
    {
        if([delegate respondsToSelector:@selector(onErrorGetArrayFromServer)])
        {
            [delegate onErrorGetArrayFromServer];
        }
    } …

我有一本字典,当我记录它时显示...

{
    Date = "2013-04-30 17:17:18 +0000";
    Description = Kb;
    EventID = "92193e58-c04a-4233-9a6c-1332bc056b20";
    Title = Keyboard;
}

我正试图把它变成NSData,用于像这样的JSON Web服务......

- (NSData *)JSONRepresentation
{
    NSDictionary *dictionary = [self dictionaryObject];

    NSError *jsonError;

    NSData *JSONData = [NSJSONSerialization dataWithJSONObject:dictionary
                                                       options:0
                                                         error:&jsonError];  //This is where the error occurs.

    return JSONData;
}

但每次我运行它时,应用程序都会崩溃.

字典正确形成,应用程序只是崩溃在这一行.

在AppCode中,我收到崩溃报告......

EXC_BREAKPOINT (code=EXC_ARM_BREAKPOINT, subcode=0xdefe))

在Xcode中,应用程序停止,如果我尝试继续,它会因错误而停止...

EXC_BAD_ACCESS (code=1, address=0x0)

我在用

imageData = UIImagePNGRepresentation(imgvw.image);

并在发布时

[dic setObject:imagedata forKey:@"image"]; 

后

NSData *data = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&theError];

现在应用程序由于未捕获的异常而崩溃终止应用程序' NSInvalidArgumentException',原因:'JSON写入中的无效类型(NSConcreteMutableData)