如何在 iOS 中从 nsstrings 添加值？

Question

我有 5 个按钮。每个按钮在名为 totalSeats_selected 的字符串中都有一些值，例如 1,2,3,4,5。
我想将它们保存到 nsstring 中，结果如下所示：
nsstring * result = [1,2,3,4,5];

这些值是用来作为对网络服务的请求，所以它必须是这种格式来发送席位总数？

那么，如何在按钮事件中将所有这些值保存在nsstring 中？

Answer 1

像这样使用。假设你的字符串是整数意味着使用方法 1。否则使用方法 2（如果你的值在 NSString 中分配）。

 Method 1:



- (IBAction)Savebtnpressed:(id)sender {

NSMutableDictionary *datadict=[NSMutableDictionary dictionary];


[datadict setValue:[NSNumber numberWithInt:[first intValue]] forKey:@"1"];

[datadict setValue:[NSNumber numberWithInt:[second intValue]] forKey:@"2"];

[datadict setValue:[NSNumber numberWithInt:[third intValue]] forKey:@"3"];

[datadict setValue:[NSNumber numberWithInt:[fourth intValue]] forKey:@"4"];

[datadict setValue:[NSNumber numberWithInt:[fifth intValue]] forKey:@"5"];

NSData* jsonData = [NSJSONSerialization dataWithJSONObject:datadict options:kNilOptions error:nil];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSURL *someURLSetBefore =[NSURL URLWithString:@" url "];
[request setURL:someURLSetBefore];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
//    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
  //    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPBody:jsonData];
NSError *error;
NSURLResponse *response;
NSData *responseData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString * string1=[[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(@"%@",string1);

 }
   }

   Method 2:


    - (IBAction)Savebtnpressed:(id)sender {

NSMutableDictionary *datadict=[NSMutableDictionary dictionary];

 [datadict setObject:[NSString stringWithFormat:@"%@",FIRST] forKey:@"1"];

[datadict setObject:[NSString stringWithFormat:@"%@",SECOND] forKey:@"2"];

   [datadict setObject:[NSString stringWithFormat:@"%@",THIRD] forKey:@"3"];

[datadict setObject:[NSString stringWithFormat:@"%@",FOURTH] forKey:@"4"];

 [datadict setObject:[NSString stringWithFormat:@"%@",FIFTH] forKey:@"5"];


NSData* jsonData = [NSJSONSerialization dataWithJSONObject:datadict options:kNilOptions error:nil];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSURL *someURLSetBefore =[NSURL URLWithString:@" url "];
[request setURL:someURLSetBefore];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
  //    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
  //    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPBody:jsonData];
NSError *error;
NSURLResponse *response;
NSData *responseData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString * string1=[[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(@"%@",string1);

}
 }