Question

我尝试动态地将对象添加到NSArray。 XCode中出现0错误。

但是，IOS模拟器会生成错误并关闭。

我的代码的静态版本可以正常工作。

所以我不明白错误在哪里。

静态版本：

  candyArray = [NSArray arrayWithObjects:
              [Candy candyOfCategory:@"chocolate" name:@"chocolate bar"],
              [Candy candyOfCategory:@"chocolate" name:@"chocolate chip"],
              [Candy candyOfCategory:@"chocolate" name:@"dark chocolate"],
              [Candy candyOfCategory:@"hard" name:@"lollipop"],
              [Candy candyOfCategory:@"hard" name:@"candy cane"],
              [Candy candyOfCategory:@"hard" name:@"jaw breaker"],
              [Candy candyOfCategory:@"other" name:@"caramel"],
              [Candy candyOfCategory:@"other" name:@"sour chew"],
              [Candy candyOfCategory:@"other" name:@"peanut butter cup"],
              [Candy candyOfCategory:@"other" name:@"gummi bear"], nil];

动态版本：

   // get JSON data from URL
   NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http:///?view=json"]];
NSURLResponse *resp = nil;
NSError *error = nil;
NSData *response = [NSURLConnection sendSynchronousRequest: theRequest returningResponse: &resp error: &error];
NSString *jsonString = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding]; //your json string from URL request

// PARSINF JSON VALUE
NSDictionary *jsonDictionary = [jsonString JSONValue];
NSDictionary *players = [jsonDictionary objectForKey:@"user"];

// Creating mutablearray who will receive the inputs of json:
NSMutableArray *nameInsert = [[NSMutableArray alloc] init];

for (NSDictionary *player in players)
{
    NSString *item = [player objectForKey:@"name"];

    [nameInsert addObject: [Candy candyOfCategory:@"chocolate" name:item" ]];
}

candyArray = nameInsert;

如果循环中不包含任何IOS模拟器。

当然，申请表中没有任何内容。

Answer 1

从你的代码中，你似乎希望players成为一个字典数组，因为你写了

(for NSDictionary *player in players)

但是，您将players初始化为NSDictionary而不是数组。您需要将其初始化为数组：

<击> NSDictionary NSArray *players = [jsonDictionary objectForKey:@"user"];

我不理解循环中的AddObject和NSMutableArray的这个错误

1 个答案: