xcode 在目标c中创建json对象数组
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Create array of json objects in objective c
提问by Dejell
I am new to objective-c and need to submit collection of json objects.
我是objective-c的新手，需要提交json对象的集合。
I wrote the following:
我写了以下内容：
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
id, @"id",
toClientGroupType, @"toClientGroupType",
dueDate, @"dueDate",
actionDate, @"actionDate",
campaignType, @"campaignType",
campaignCategory, @"campaignCategory",
businessId, @"businessId",
promotion, @"promotion",
product, @"product",
contentF, @"content",
subject, @"subject",
nil];
NSData *jsonData2 = [NSJSONSerialization dataWithJSONObject:jsonDictionary options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData2 encoding:NSUTF8StringEncoding];
NSLog(@"jsonData as string:\n%@", jsonString);
[request setURL:[NSURL URLWithString:@"https://services-dev.a.com/api/channels"]];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:jsonData2];
I have 2 problems:
我有两个问题：
A. The output of jsonData as String is
A. jsonData as String 的输出是
{
"toClientGroupType" : "VIP",
"id" : "1",
"dueDate" : "2012-09-03 10:25:42 +0000",
"actionDate" : "2012-09-03 10:25:42 +0000",
"campaignType" : "ONE_TIME",
"businessId" : "150",
"campaignCategory" : "SALE"
}
As you see - I am missing 3 fiels which I declared: content, productand subject
如您所见 - 我缺少我声明的 3 个字段：content,product和subject
B. I actually need to submit an array of objects so the request will be like this:
B. 我实际上需要提交一个对象数组，所以请求将是这样的：
[{
"toClientGroupType" : "VIP",
"id" : "1",
"dueDate" : "2012-09-03 10:25:42 +0000",
"actionDate" : "2012-09-03 10:25:42 +0000",
"campaignType" : "ONE_TIME",
"businessId" : "150",
"campaignCategory" : "SALE"
}]
How can I do it and what is wrong?
我该怎么做，出了什么问题？
回答by prashant
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
id, @"id",
toClientGroupType, @"toClientGroupType",
dueDate, @"dueDate",
actionDate, @"actionDate",
campaignType, @"campaignType",
campaignCategory, @"campaignCategory",
businessId, @"businessId",
promotion, @"promotion",
product, @"product",
contentF, @"content",
subject, @"subject",
nil];
NSMutableArray * arr = [[NSMutableArray alloc] init];
[arr addObject:jsonDictionary];
NSData *jsonData2 = [NSJSONSerialization dataWithJSONObject:arr options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData2 encoding:NSUTF8StringEncoding];
NSLog(@"jsonData as string:\n%@", jsonString);
Checkout this one
结帐这个
回答by prashant
NSError *error;
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
@"1", @"id",
@"test", @"toClientGroupType",
@"test", @"dueDate",
@"test", @"actionDate",
@"test", @"campaignType",
@"test", @"campaignCategory",
@"test", @"businessId",
@"test", @"promotion",
@"test", @"product",
@"test", @"content",
@"test", @"subject",
nil];
NSMutableArray * arr = [[NSMutableArray alloc] init];
[arr addObject:jsonDictionary];
NSData *jsonData2 = [NSJSONSerialization dataWithJSONObject:arr options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData2 encoding:NSUTF8StringEncoding];
NSLog(@"jsonData as string:\n%@", jsonString);
Output :- [ { "subject" : "test", "toClientGroupType" : "test", "id" : "1", "dueDate" : "test", "actionDate" : "test", "campaignType" : "test", "businessId" : "test", "product" : "test", "content" : "test", "campaignCategory" : "test", "promotion" : "test" } ]
输出：- [ { "subject" : "test", "toClientGroupType" : "test", "id" : "1", "dueDate" : "test", "actionDate" : "test", "campaignType" : "测试”，“businessId”：“测试”，“产品”：“测试”，“内容”：“测试”，“campaignCategory”：“测试”，“促销”：“测试”}]
check out the data in to promotion, product, content and subject.it should not be nil or null
检查促销，产品，内容和主题中的数据。它不应为零或为空
回答by mano
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSError *error;
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:receivedData options:NSJSONReadingAllowFragments error:&error];
NSArray *categoryArray= [dic valueForKey:@"SELECTED OBJECT KEY"];
NSLog(@"category%@",categoryArray);
}
category: Display Category array content
category：显示类别数组内容
