ios - 带数组 iOS 的 JSON 字符串

Question

我的应用程序从 api 调用中获取一个 JSON 字符串 JSON 字符串中包含对象 和一个数组。这是我到目前为止所做的，但我无法从中获得值(value)。请给我建议，我是 iOS 新手。这是我的 JSON 字符串:

{
   "Id":"0d95a9f6-c763-4a31-ac6c-e22be9832c83",
   "Name":"john",
   "ProjectName":"project1",
   "StartDate":"\/Date(1447200000000)\/",
   "Documents":        
   [{
       "Id":"2222a","Name":"book1","ContentType":"application/pdf"
    }, 
   {
       "Id":"3718e","Name":"Toolbox","ContentType":"application/fillform"
   }]
}

代码

NSString *URLString = [NSString stringWithFormat:@"http://mysite/API/Assignments?"];
NSURL *url = [NSURL URLWithString:URLString];
NSData *data=[NSData dataWithContentsOfURL:url];
json=[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];

assignArray=[[NSMutableArray alloc]init];

for (int i=0; i<json.count; i++) {
    NSString *aID=[[json objectAtIndex:i]objectForKey:@"Id"];
    NSString *uName=[[json objectAtIndex:i]objectForKey:@"Name"];
    NSString *pName=[[json objectAtIndex:i]objectForKey:@"ProjectName"];

    //[self initwithUserID:uID userName:uName proName:pName];
  // [self retrieveAssignmentDetails:aID];
    AssignmentsJson *assignment=[[AssignmentsJson alloc]initwithassignID:aID userName:uName proName:pName];
    [assignArray addObject:assignment];

Answer 1

你的 json 不是数组，所以解析如下

NSString *aID = json[@"Id"];
NSString *uName = json[@"Name"];
NSString *pName = json[@"ProjectName"];
NSString *startDate = json[@"StartDate"];

NSArray *documents = json[@"Documents"];
for (NSDictionary *item in documents) {
    NSString *itemID = item[@"Id"];
    NSString *itemName = item[@"Name"];
    NSString *itemContentType = item[@"ContentType"];
}