如何从方向API Google Maps获得响应

Question

我正在尝试获取响应Google Directions API。您能找到此错误吗？

NSString *str = [NSString stringWithFormat:@"%@origin=%f,%f&destination=%f,%f&key=%@",@"https://maps.googleapis.com/maps/api/directions/json?",
                     self.marker.position.latitude,
                     self.marker.position.longitude,
                     self.SecondMarker.position.latitude,
                     self.SecondMarker.position.longitude,
                     @"AIzaSyDhZvxehd6ZDKFOB67WIyeLpy7KITwRPw0"];
    //str = [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    str = [str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];
    NSURL *url = [NSURL URLWithString:str];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    //NSString *params = @"";
    [request setHTTPMethod:@"POST"];
    //[request setHTTPBody:[params dataUsingEncoding:NSUTF8StringEncoding]];
    NSURLSession *session = [NSURLSession sharedSession];
    [[session dataTaskWithRequest:request
                completionHandler:^(NSData *data,
                                    NSURLResponse *response,
                                    NSError *error) {
                    // handle response
                    if (!error && [data length]) {
                        NSLog(@"Reponse: %@",response);
                    }
                    else{
                        NSLog(@"%@",error.description);
                    }
                }] resume];

请建议一些代码行？

错误消息：

Reponse: <NSHTTPURLResponse: 0x60800002d480> { URL: https://maps.googleapis.com/maps/api/directions/json?origin=-33.860000,151.200000&destination=-34.224142,150.068408&key=AIzaSyDhZvxehd6ZDKFOB67WIyeLpy7KITwRPw0

} {状态代码：200，标题{ " cache-control" =" public，max-age = 86400"; "内容编码" = gzip; "内容长度" = 23856; " content-type" =" application/json; charset = utf-8"; date ="星期二，2017年4月25日08:48:36格林尼治标准时间"; Expires =" 2017年4月26日星期三08:48:36 GMT"; 服务器= mafe; vary ="接受语言"; " alt-svc" =" quic = "：443 "; ma = 2592000; v = " 37,36,35 ""; " X-Frame-Options" = Sameorigin; " X-XSS保护" =" 1; mode = block"; }}

Answer 1

尝试像这样

   NSString *str = [NSString stringWithFormat:@"%@origin=%f,%f&destination=%f,%f&key=%@",@"https://maps.googleapis.com/maps/api/directions/json?",
                     self.marker.position.latitude,
                     self.marker.position.longitude,
                     self.SecondMarker.position.latitude,
                     self.SecondMarker.position.longitude,
                     @"AIzaSyDhZvxehd6ZDKFOB67WIyeLpy7KITwRPw0"];
str = [str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];
NSURL *url = [NSURL URLWithString:str];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:nil delegateQueue:nil];
[[session dataTaskWithRequest:request completionHandler:^(NSData *data,NSURLResponse *response,NSError *error) {
                if (!error && [data length])
                {
                    NSLog(@"Reponse: %@",response);
                    NSError *e = nil;
                    NSDictionary *JSONarray = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error:&e];
                    NSLog(@"Response dictionary is%@",JSONarray);
                }
                else
                {
                    NSLog(@"%@",error.description);
                }
            }] resume];