更新 2:

这是 map 中的现有代码，但好像注释与图钉一起乱序了。一次 pin 是绿色的，下一次我运行它时，同一个 pin 是红色的。脱节从何而来？

-(void) viewWillAppear:(BOOL)animated {
    self.annotationArray = [[NSMutableArray alloc] init];

CLLocationCoordinate2D coord = {.latitude =  15.8700320, .longitude =  100.9925410};
MKCoordinateSpan span = {.latitudeDelta =  3, .longitudeDelta =  3};
MKCoordinateRegion region = {coord, span};
[mapViewUI setRegion:region];
    PFQuery *query = [PFQuery queryWithClassName:@"Share"];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
                       self.mapViewData = objects;
                        for (int i=0;i<[objects count];i++)
            {
                // Question * q = [[Question alloc]init];

                PFObject * obj = [self.mapViewData objectAtIndex:i];
                NSLog(@"%@", obj);
                self.theObject = obj;

                NSString *string = obj[@"WhereAt"];


                NSArray *stringArray = [string componentsSeparatedByString: @","];

                CLLocationDegrees myLatitude = [[stringArray objectAtIndex:0] doubleValue];
                CLLocationDegrees myLongitude = [[stringArray objectAtIndex:1] doubleValue];
                CLLocationCoordinate2D coord2 = {.latitude =  myLatitude, .longitude =  myLongitude};
                NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
                dateFormatter.dateFormat = @"MMM dd, yyyy";

                MKPointAnnotation *annotation2 = [[MKPointAnnotation alloc] init];
                [annotation2 setCoordinate:coord2];
                [annotation2 setTitle:obj[@"FamilyName"]];
                [annotation2 setSubtitle:obj[@"Result"]];
                [mapViewUI addAnnotation:annotation2];


            }


        } else {
            // Log details of the failure
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }


    }];

}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
    if (annotation == mapViewUI.userLocation)
    {
        return nil;
    }
    else
    {
    NSUInteger index = [[mapView annotations] indexOfObject:annotation];
    PFObject *objectForCurrentAnnotation = [self.mapViewData objectAtIndex:index];
    MKPinAnnotationView *annotationView = [[MKPinAnnotationView alloc] init];

    annotationView.enabled = YES;
    annotationView.canShowCallout = YES;
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.dateFormat = @"MMM dd, yyyy";
    NSString *theResult = objectForCurrentAnnotation[@"Result"];
    NSLog(@"Result is %@", theResult);

    if ([theResult isEqualToString:@"Accepted Bible"]) {
        NSLog(@"Accepted");
        annotationView.pinTintColor = [UIColor greenColor];

    }
   else if ([theResult isEqualToString:@"Requested Different Material"]) {
       NSLog(@"Different");

        annotationView.pinTintColor = [UIColor blackColor];

    }
   else if ([theResult isEqualToString:@"Not Home"]) {
      NSLog(@"Not Home");

        annotationView.pinTintColor = [UIColor yellowColor];

    }
   else if ([theResult isEqualToString:@"Rejected Bible"]) {
       NSLog(@"Rejected");

        annotationView.pinTintColor = [UIColor redColor];

    }



    return annotationView;
    }

    return nil;
}

更新:

我现在看到问题是 self.theObject 被设置了一次，所以它只是从中提取数据，用于注释未处理的所有内容。我想现在的问题是，我怎样才能让它显示每个对象而不是最后一组？

我的应用程序使用 Parse.com 和 PFObjects。该应用程序查询 PFObject 以获取行中每个条目的所有数据，提取该条目给定位置的坐标以及各种数据，并为每个条目添加注释。当我为此设置 MKAnnotationView 以便我可以在 Apple 通常允许您轻松执行的操作之外拥有多个彩色图钉时，我遇到了问题。注释的图像和一些数据将每个引脚设置为最后一个调用的引脚。标题和副标题都很好，但颜色或标注图像不是。这是我的代码，这里出了什么问题？

-(void) viewWillAppear:(BOOL)animated {
CLLocationCoordinate2D coord = {.latitude =  15.8700320, .longitude =  100.9925410};
MKCoordinateSpan span = {.latitudeDelta =  3, .longitudeDelta =  3};
MKCoordinateRegion region = {coord, span};
[mapView setRegion:region];
    PFQuery *query = [PFQuery queryWithClassName:@"Share"];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            NSLog(@"YAY");
            // The find succeeded. The first 100 objects are available in objects
            //  questionsList = [[NSMutableArray alloc]init];
            NSLog(@"Objects%lu", (unsigned long)[objects count]);

            for (int i=0;i<[objects count];i++)
            {
                // Question * q = [[Question alloc]init];

                PFObject * obj = [objects objectAtIndex:i];
                self.theObject = obj;

                NSString *string = obj[@"WhereAt"];


                NSArray *stringArray = [string componentsSeparatedByString: @","];

                CLLocationDegrees myLatitude = [[stringArray objectAtIndex:0] doubleValue];
                CLLocationDegrees myLongitude = [[stringArray objectAtIndex:1] doubleValue];
                CLLocationCoordinate2D coord2 = {.latitude =  myLatitude, .longitude =  myLongitude};
                NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
                dateFormatter.dateFormat = @"MMM dd, yyyy";
                NSString *theResult = obj[@"Result"];


                NSString *theDate = [dateFormatter stringFromDate:obj[@"DateVisited"]];
                NSString *combined = [[theResult stringByAppendingString:@" on "] stringByAppendingString:theDate];
                NSString *theTitle = [[obj[@"FamilyName"] stringByAppendingString:@" "] stringByAppendingString:obj[@"StreetAddress"]];

                MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
                [annotation setCoordinate:coord2];
                [annotation setTitle:theTitle];
                [annotation setSubtitle:combined];

                [mapView addAnnotation:annotation];

            }


        } else {
            // Log details of the failure
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
    }];



}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {


    MKPinAnnotationView *annotationView = [[MKPinAnnotationView alloc] init];

    annotationView.enabled = YES;
    annotationView.canShowCallout = YES;
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.dateFormat = @"MMM dd, yyyy";
    NSString *theResult = self.theObject[@"Result"];
    NSLog(@"Result is %@", theResult);

    if ([theResult isEqualToString:@"Accepted Bible"]) {
      //  NSLog(@"Accepted");
        annotationView.pinTintColor = [UIColor greenColor];

    }
   else if ([theResult isEqualToString:@"Requested Different Material"]) {
       //NSLog(@"Different");

        annotationView.pinTintColor = [UIColor blackColor];

    }
   else if ([theResult isEqualToString:@"Not Home"]) {
      // NSLog(@"Not Home");

        annotationView.pinTintColor = [UIColor yellowColor];

    }
   else if ([theResult isEqualToString:@"Rejected Bible"]) {
       //NSLog(@"Rejected");

        annotationView.pinTintColor = [UIColor redColor];

    }
    //annotationView.image = [UIImage imageNamed:@"arrest.png"];//here we use a nice image instead of the default pins
    PFFile *thumbnail = self.theObject[@"HousePicture"];
    [thumbnail getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {

        UIImage *thumbnailImage = [UIImage imageWithData:imageData];
        self.theImage = thumbnailImage;
        //annotationView.image = thumbnailImage;
        UIView *leftCAV = [[UIView alloc] initWithFrame:CGRectMake(0,0,60,60)];
        UIImageView *theImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 60, 60)];
        theImageView.image = self.theImage;
        annotationView.leftCalloutAccessoryView = leftCAV;
        [leftCAV addSubview:theImageView];
        annotationView.canShowCallout = YES;

    }];


    return annotationView;


    return nil;
}

最佳答案

子类 MKPointAnnotation 例如 MyPointAnnotation 添加一个属性 result

@interface MyPointAnnotation : MKPointAnnotation
    @property (nonatomic, strong) NSString *result;
@end

在viewWillAppear:中修改这些行

NSString *theResult = obj[@"Result"];

MyPointAnnotation *myAnnotation = [[MyPointAnnotation alloc] init];
[myAnnotation setCoordinate:coord2];
[myAnnotation setTitle:theTitle];
[myAnnotation setSubtitle:combined];
[myAnnotation setResult:theResult];

[mapView addAnnotation:myAnnotation];

在viewForAnnotation:委托(delegate)方法中得到这样的结果

MyPointAnnotation *myAnnotation = (MyPointAnnotation *)annotation;
NSString *theResult = myAnnotation.result;

关于ios - 向 map 添加多个注释但都显示一些相同的数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39235505/