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我尝试动态地添加对象到NSArray。 0错误出现在XCode中。我不明白这个错误与循环和NSMutableArray中的AddObject
但是,IOS模拟器会生成错误并关闭。
我的代码的静态版本正常工作。
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:
// 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;
如果循环中没有任何IOS模拟器的作品。
当然,应用程序中没有任何内容。
你能至少发布错误? – WDUK
''nameInsert addObject:[Candy candyOfCategory:@“chocolate”name:item“]];'最后一个报价是做什么的 - 是直接复制粘贴吗? – sjwarner
您是否在'NSString'上使用了一个类别?'NSString'没有任何方法'JSONValue'! – HAS