Question

我在地图上获取注释的地理位置，并希望在自定义视图中显示来自同一行的用户相关图像。

我尝试将PFFiles与ObjectID一起保存在字典中，因为我将每个注释的标题设置为其位置的ObjectID，但这给了我 - [PFObject objectID] ：无法识别的选择器发送到实例。

这就是我目前正在做的事情。

PFQuery *query = [PFQuery queryWithClassName:@"photoObject"];

    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error){

        for (id object in objects) {


            [self.annotationArray addObject:object[@"location"]];
            NSLog(@"Annotation's coordinate : %@", self.annotationArray);

            UIImage *image = [UIImage imageWithData:object[@"photo"]];

            [self.imageFileDict setObject:object[@"photo"] forKey:[object objectID]];
            NSLog(@"imageFileDict : %@", self.imageFileDict);

            self.geoPoint = object[@"location"];

            CLLocationCoordinate2D locCoord = CLLocationCoordinate2DMake(self.geoPoint.latitude, self.geoPoint.longitude);
            CustomPin *pin = [[CustomPin alloc] initWithTitle:[object objectId] location:locCoord image:image];
            [self.mainMap addAnnotation:pin];

            NSLog(@"Adding annotation");


        }

    }];

然后

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {

CustomPin *pin = (CustomPin *)[view annotation];
NSLog(@"selected pin's objectID : %@",pin.title);

UIImageView *callOutview = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.width)];
[self.view addSubview:callOutview];
callOutview.backgroundColor = [UIColor yellowColor];

callOutview.image = pin.image;}

修改

我已经意识到我必须这样做才能使它与PFFiles一起使用

PFFile *imageFile = object[@"photo"];
            [imageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
                if (!error) {
                    self.callOutImage = [UIImage imageWithData:imageData];


                }}];

但仍然无法正常工作。

Answer 1

解决了它..

PFFile *imageFile = object[@"photo"];
            [imageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
                if (!error) {

                    [self.annotationArray addObject:object[@"location"]];
                    NSLog(@"Annotation's coordinate : %@", self.annotationArray);


                    self.callOutImage = [UIImage imageWithData:imageData];

                    self.geoPoint = object[@"location"];

                    CLLocationCoordinate2D locCoord = CLLocationCoordinate2DMake(self.geoPoint.latitude, self.geoPoint.longitude);
                    CustomPin *pin = [[CustomPin alloc] initWithTitle:[object objectId] location:locCoord image:self.callOutImage];
                    [self.mainMap addAnnotation:pin];

                }}];

我必须在getDataInBackgroundWithBlock中设置图像，因为我在后台获取了UIImages的PFFiles，否则图像没有数据。

从Parse沿其地理位置检索图像

1 个答案: