ios - 如何通过 Post 方法使用 JSON 模型将 JSON 字典作为参数传递？

Question

我想使用 uploadUrl 将 JSON 字典作为参数传递，但它给我一个 Unsupported Url 错误代码 1002。

当我在 Postman 上点击这个 URL 时，它运行良好。我如何使用 JSON 模型实现它？

NSString *uploadUrl =@"<Your host URL>";

[JSONHTTPClient postJSONFromURLWithString:uploadUrl params:nil
                               completion:^(NSDictionary *json, JSONModelError *err)
{
    if(err == nil)
    {
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"success" message:@"uploaded" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
        [alert show];
        completionHanldler(json);
    }
    else
    {
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Failed" message:@"uploaded" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
        [alert show];

        NSMutableDictionary *errorDict=[[NSMutableDictionary alloc]init];
        if(err.code==-1009)
            [errorDict setObject:@"The Internet connection appears to be offline."forKey:@"error"];
        else
            [errorDict setObject:@"Error occurred. Please try again!"forKey:@"error"];

        completionHanldler(errorDict);
    }
}];

Answer 1

stringByAddingPercentEscapesUsingEncoding

这个方法解决了这个问题。以前我分配的是不受支持的 URL。

NSError * err;
NSData * jsonData = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:&err];
NSString *myString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
// This line is the answer.
myString = [myString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

NSString *uploadUrl = [NSString stringWithFormat:@"<MY host URL>"?data=%@",myString];

[JSONHTTPClient postJSONFromURLWithString:uploadUrl params:nil
                               completion:^(NSDictionary *json, JSONModelError *err)
{
    if(err == nil)
    {
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"success" message:@"uploaded" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
        [alert show];
        completionHanldler(json);
    }
    else
    {
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Failed" message:@"uploaded" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
        [alert show];

        NSMutableDictionary *errorDict=[[NSMutableDictionary alloc]init];
        if(err.code==-1009)
            [errorDict setObject:@"The Internet connection appears to be offline."forKey:@"error"];
        else
            [errorDict setObject:@"Error occurred. Please try again!"forKey:@"error"];

        completionHanldler(errorDict);
    }
}];