Question

我创建了一个可变的请求。

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
                                                         cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
// I want to add a request parameter - Not in the header or body.

   Add Your code here

//

[request setHTTPBody:data];

任何人请帮帮我

Answer 1

希望这会帮助你

NSString *post=[NSString stringWithFormat:@"data={\"user_id\":\"abc\",\"Method\":\"User_nji_abc\"}"];

NSURL *url=[NSURL URLWithString:YOUR_BASE_URL];

NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
NSOperationQueue *queue=[[NSOperationQueue alloc]init];
[NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response,
                                                                                 NSData *data, NSError *error) {
    if ([data length] >0 && error == nil){


        dicWholeValue=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];


        NSLog(@"%@",dicWholeValue);

    }
    else if ([data length] == 0 && error == nil){
        NSLog(@"Nothing was downloaded."); }
    else if (error != nil){
        [[NSOperationQueue mainQueue] addOperationWithBlock:^{

            //Do any updates to your label here
            UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Message" message:@"Could not connect to server." delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];

            [alert show];
            alert=nil;
            NSLog(@"Error happened = %@", error);

        }];

    } }];

Answer 2

在您的问题中，您指定了Content-Type application/json，因此，如果这是您的服务器所需要的，那么您可能会使用NSJSONSerialization方法{{1构建您用dataWithJSONObject指定的NSData对象。例如：

setHTTPBody

但有时，Web服务将返回JSON，但期望请求为NSDictionary *params = @[@"search" : @"restaurants", @"postal" : @"10003"]; // supply whatever your web service requires NSError *error; NSData *data = [NSJSONSerialization dataWithJSONObject:params options:0 error:&error]; NSAssert(data, @"Unable to serialize JSON: %@", error); [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; [request setHTTPBody:data];。在这种情况下，application/x-www-form-urlencoded的格式非常不同。

NSData

你的百分比在哪里逃避你的字符串：

NSDictionary *params = @[@"search" : @"restaurants", 
                         @"postal" : @"10003"];     // supply whatever your web service requires

NSMutableArray *postArray = [NSMutableArray array];
[params enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString *obj, BOOL *stop) {
    [postArray addObject:[NSString stringWithFormat:@"%@=%@", key, [self percentEscapeString:obj]]];
}];
NSString *postString = [postArray componentsJoinedByString:@"&"];
NSData *data = [postString dataUsingEncoding:NSUTF8StringEncoding];

[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:data];

（注意，这需要iOS 7或更高版本。如果支持早期iOS版本，则必须执行this之类的操作。）

最重要的是，在我们进一步建议您之前，我们需要有关Web服务API所需内容的更多信息。

如何在NSMutableRequest中添加请求参数

2 个答案: