Question

我正在尝试将dogData从我的ViewController传递给PetViewController（通过模态segue）。也就是说，出于某种原因，当我尝试传递dogData（NSMutableArray）时，我得到了这个错误：

[__ NSArrayI length]：发送到实例的无法识别的选择器

知道为什么会这样吗？请参阅下面的代码（希望这是足够的信息，试图修剪它）。

ViewController.h

@property (strong, nonatomic) NSMutableArray *dogData;

ViewController.m

 NSMutableDictionary *viewParamsDogs = [NSMutableDictionary new];
    [viewParamsDogs setValue:@"mydogs" forKey:@"view_name"];
    [DIOSView viewGet:viewParamsDogs success:^(AFHTTPRequestOperation *operation, id responseObject) {


      self.dogData = [responseObject mutableCopy];
        NSLog(@"This is the dog photo data %@", self.dogData);

        [operation responseString];


        NSDictionary *dic = [responseObject valueForKey: @"field_pet_photo_path"];
                             NSArray *arr = [dic valueForKey: @"und"];
                             NSDictionary *dic2= [arr objectAtIndex : 0];
       NSString *path = [NSString stringWithFormat:@"%@", [dic2 valueForKey: @"safe_value"]];


        NSMutableCharacterSet *characterSetToTrim = [NSMutableCharacterSet characterSetWithCharactersInString:@"()\""];
        [characterSetToTrim formUnionWithCharacterSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

        path = [path stringByTrimmingCharactersInSet:characterSetToTrim];



  if([path length]>0) {



      NSURL *url = [NSURL URLWithString:path];

      NSData *data = [NSData dataWithContentsOfURL:url];
      UIImage *image = [UIImage imageWithData:data];
      self.dogimageView.image = image;


        } else {

            NSString *ImageURL = @"http://url.ca/paw.png";
            NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:ImageURL]];
            self.dogimageView.image = [UIImage imageWithData:imageData];
      }


    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Failure: %@", [error localizedDescription]);
    }];



        - (IBAction)openPetProfile:(id)sender {

            PetViewController *petProfile = [[PetViewController alloc] init];
            petProfile.petSubDetail = self.dogData;
            [self presentViewController:petProfile animated:YES completion:nil];

        }

PetViewController.h

@property (nonatomic, copy) NSMutableArray *petSubDetail;
@property (weak, nonatomic) IBOutlet UILabel *petName;

PetViewController.m

- (void)viewDidLoad {
    [super viewDidLoad];

      self.petName.text = [self.petSubDetail valueForKey:@"petname"];


}

数据输出：

  "field_petname" =         {
        und =             (
                            {
                format = "<null>";
                "safe_value" = Pebbles;
                value = Pebbles;
            }
        );
    };

Answer 1

您的代码应该是，

 NSdictionary *dict =  [self.petSubDetail objectForKey:@"field_petname"];
 NSArray *arr = [dict objectForKey:@"und"];
 NSdictionary *dict1 = [arr objectAtIndex : 0];
 self.petName.text = [dict1  valueForKey:@"value"];

在密钥使用"中需要\"的位置希望这会有所帮助：）

通过模态segue传递数据：[__ NSArrayI length]：发送到实例

1 个答案: