我正在尝试将dogData从我的ViewController传递到PetViewController（通过模态segue）。也就是说，由于某种原因，当我尝试传递dogData（NSMutableArray）时，我收到此错误：
[__NSArrayI长度]：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，尝试修剪它）。
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];
}
宠物视图控制器.h
@property (nonatomic, copy) NSMutableArray *petSubDetail;
@property (weak, nonatomic) IBOutlet UILabel *petName;
宠物视图控制器.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;
}
);
};
你的代码应该是这样的，
NSdictionary *dict = [self.petSubDetail objectForKey:@"field_petname"];
NSArray *arr = [dict objectForKey:@"und"];
NSdictionary *dict1 = [arr objectAtIndex : 0];
self.petName.text = [dict1 valueForKey:@"value"];
您需要在密钥使用"中"的地方 希望这对:)有所帮助