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我有这个 html 表单可以将我的数据从 iphone 传递到网络服务器.. 但我遇到了如何将此表单/数据构建为可变请求的问题。你能请。告诉我。

html格式:

<html>
<form method="post" action="https://mysite.com"> 
<input type="hidden" name="action" value="sale"> 
<input type="hidden" name="acctid" value="TEST123"> 
<input type="hidden" name="amount" value="1.00">
<input type="hidden" name="name" value="Joe Customer"> 
<input type="submit"> 
</form>
</html>

我不知道如何在 url 请求中将“值”分配给特定键(例如 action、acctid、amount、name)???

这是我的代码:

NSString *urlString =  @"https://mysite.com";
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString]];

NSString *post = [[NSString alloc] initWithFormat:@"%@%@&%@%@&%@%@&%@%@", 
   action, sale, 
   acctid, TEST123, 
   amount, 1.00,
                                      name, Joe Customer];  // ????

NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];    
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];  

[urlRequest setHTTPMethod:@"POST"];  
[urlRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];  
[urlRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];  // multipart/form-data
[urlRequest setHTTPBody:postData];
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1 回答 1

3

看起来不错,尽管您在格式字符串中缺少一些等号,并且您需要将字符串参数包装在@""

NSString *post = [[NSString alloc] initWithFormat:@"%@=%@&%@=%@&%@=%@&%@=%@", 
    @"action", @"sale", 
    @"acctid", @"TEST123", 
    @"amount", @"1.00",
    @"name", @"Joe Customer"];

对于更可扩展的解决方案,您可以将键/值对存储在字典中,然后执行以下操作:

// Assuming the key/value pairs are in an NSDictionary called payload

NSMutableString *temp = [NSMutableString stringWithString:@""];
NSEnumerator *keyEnumerator = [payload keyEnumerator];
id key;
while (key = [keyEnumerator nextObject]) {
    [temp appendString:[NSString stringWithFormat:@"%@=%@&", 
        [key description], 
        [[payload objectForKey:key] description]]];
}
NSString *httpBody = [temp stringByTrimmingCharactersInSet:
    [NSCharacterSet characterSetWithCharactersInString:@"&"]];

(请记住,您可能需要对键和值进行 URL 编码。)

于 2010-11-25T15:12:24.027 回答