我无法相信我甚至无法使用JSONKit这个简单的测试存根......
我有一个包含有效JSON文档的json文件,以及这个简单的代码:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSError *err = nil;
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"dk" ofType:@"json"];
NSData *jsonData = [NSData dataWithContentsOfFile:filePath options:NSDataReadingMappedIfSafe error:&err];
NSString *dkk = [[NSString alloc] initWithContentsOfFile:filePath];
NSLog(@"Found file with contents: \n%@",dkk);
if(jsonData)
{
NSLog(@"Data length is: %d",[jsonData length]);
id objectReturnedFromJSON = [jsonData objectFromJSONData];
if(objectReturnedFromJSON)
{
if([objectReturnedFromJSON isKindOfClass:[NSDictionary class]])
{
NSDictionary * dictionaryFromJSON = (NSDictionary *)objectReturnedFromJSON;
// ...
} else {
NSLog( @"no dictionary from the data returned by the server... check the data to see if it's valid JSON");
}
} else {
NSLog( @"nothing valid returned from the server...");
}
} else {
NSLog( @"no data back from the server");
}
}
objectFromJSONData的结果似乎总是返回null。输出如下所示:
2013-01-15 00:58:37.187 JSONTest[38110:c07] Found file with contents:
myObject = {
"first": "John",
"last": "Doe",
"age": 39,
"sex": "M",
"salary": 70000,
"registered": true,
"favorites": {
"color": "Blue",
"sport": "Soccer",
"food": "Spaghetti"
}
}
2013-01-15 00:58:51.818 JSONTest[38110:c07] Data length is: 196
2013-01-15 00:58:54.058 JSONTest[38110:c07] Data length is: (null)
(lldb)
我错过了什么?输入JSON有效(如NSLog语句所示)。
很抱歉,如果这是一个愚蠢的事情,但即使在这个小小的测试案例中,我也浪费了太多时间,让我觉得我错过了一些东西。
答案 0 :(得分:3)
您拥有的JSON无效。它没有根元素,myObject
键也没有括在括号内。