Question

一些快速背景，我执行搜索位置搜索请求。搜索请求的代码如下：

搜索

-(void)performSearch {
    // activate search inidicator
    [self.completingSearchIndicator startAnimating];
    self.completingSearchIndicator.hidesWhenStopped = YES;
    self.doneButton.enabled = NO;
    self.cancelButton.enabled = NO;
    self.searchButton.enabled = NO;

    // Create a search request
    MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
    request.naturalLanguageQuery = self.searchText.text;

    // adjust the region of search so it is about 5000m x 5000m
    // about 2.5x bigger than viewing region
    // we should allow users to adjust this ****
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(self.mapHandle.userLocation.location.coordinate, 5000, 5000);;
    request.region = region;

    MKLocalSearch *search = [[MKLocalSearch alloc] initWithRequest:request];
    [search startWithCompletionHandler:^ (MKLocalSearchResponse *response, NSError *error)
     {  // a block which loads each item into an array for us to use
        // an array of MKMapItem objects
         NSMutableArray *placemarks = [NSMutableArray array];
         for (MKMapItem *item in response.mapItems) {
             [placemarks addObject:item.placemark];
         }
         // save results in an instance variable
         self.searchResults = placemarks;

         // reactivate everything!
         [self.completingSearchIndicator stopAnimating];
         self.doneButton.enabled = YES;
         self.cancelButton.enabled = YES;
         self.searchButton.enabled = YES;
     }];
}

从那里我收到一个MKMapItems数组，我选择我要保存的那些，并将它们存储在另一个数组中。从这里我想打印出他们的坐标，但是，在尝试访问它们时我一直收到错误。我用来访问它们的代码是：

    for (MKMapItem *item in self.selectedPlaces) {
        MKPlacemark *temp = item.placemark;
        CLLocationCoordinate2D coords = temp.coordinate;
        NSString *coordinateString = [NSString stringWithFormat:@"%f", coords.latitude];
        NSLog(@"%@",coordinateString);
    }

我得到的错误是：

2014-04-21 20:15:30.931 iTasks[2759:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MKPlacemark placemark]: unrecognized selector sent to instance 0x193a5610'

任何决议或候补政策都将受到赞赏！非常感谢提前！

Answer 1

也许你想要这个呢？

for (MKPlacemark *item in self.selectedPlaces) {
    CLLocationCoordinate2D coords = item.location.coordinate;
    NSString *coordinateString = [NSString stringWithFormat:@"%f", coords.latitude];
    NSLog(@"%@",coordinateString);
}

尝试从MKMapItem获取坐标时出错

1 个答案: