Question

有两个文件.h和.m有完整的代码，请帮我弄清楚问题，为什么标记没有出现。我已经安装了pod文件和googlemap sdk。一切正常，但只是标记没有显示，我也在日志中打印了值，它们运行良好，但在地图上没有标记或注释。

.h文件

#import <UIKit/UIKit.h>
#import <GoogleMaps/GoogleMaps.h>


@interface ViewController : UIViewController<GMSMapViewDelegate>{
NSArray *addressArray;
NSArray *name;
__weak IBOutlet UIView *loaderView;

}
@property (strong, nonatomic) IBOutlet GMSMapView *mapView;
@property (strong, nonatomic) ViewController *calloutView;
@property (strong, nonatomic) UIView *emptyCalloutView;

@end

.m文件

#import "ViewController.h"
#import "SimplestGoogleMapApp-Prefix.pch"
#import <GoogleMaps/GoogleMaps.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
self.mapView.myLocationEnabled=YES;
self.mapView.mapType=kGMSTypeNormal;
self.mapView.settings.compassButton=YES;
self.mapView.settings.myLocationButton=YES;
self.mapView.delegate=self;
[self addMarlerToMap];

}
-(void)addMarlerToMap{
NSURL *kAPIURL = [NSURL URLWithString:@"abcURl"];

NSString *jsonString = @"data={some data}";

NSData *JSONData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:kAPIURL];
request.HTTPMethod = @"POST";
request.HTTPBody = JSONData;

NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request
                                                             completionHandler:^(NSData *data,
                                                                                     NSURLResponse *response,
                                                                                 NSError *error)
                              {
                                  if (!error)
                                  {
                                      NSError *JSONError = nil;

                                      NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data
                                                                                                 options:0
                                                                                                   error:&JSONError];
                                      NSLog(@"%@",dictionary);
                                      if (JSONError)
                                      {
                                          NSLog(@"Serialization error: %@", JSONError.localizedDescription);
                                      }
                                      else
                                      {

                                          dispatch_async(dispatch_get_main_queue(), ^{
                                addressArray = dictionary[@"data"][@"centers"];


                loaderView.hidden = true;
      UIImage *pinImage = [UIImage imageNamed:@"map_gym"];

        for(int i=0;i<=[addressArray count];i++){
        self.view = _mapView;
        NSString *lat = [[addressArray objectAtIndex:i] objectForKey:@"lat"];
        NSString *lon = [[addressArray objectAtIndex:i] objectForKey:@"lng"];
              double lt=[lat doubleValue];
        double ln=[lon doubleValue];
        NSString *name = [[addressArray objectAtIndex:i] objectForKey:@"category_name"];
       NSLog(@"%@ and %@ and %f and %f of %@",lat,lon, lt,ln,name);
                                                  GMSMarker *marker = [[GMSMarker alloc] init];
                                                 // marker.animated=YES;
          marker.position = CLLocationCoordinate2DMake(lt,ln);
          marker.title = name;
          marker.map = _mapView;

     }});}}
   else
     {
      NSLog(@"Error: %@", error.localizedDescription);
                                  }
                              }];
[task resume];
 }

Answer 1

从聊天中可以看出你的地图已初始化为不同的位置而不是你添加的地方标记。要解决此问题，请使用此代码将地图设置为标记的动画位置

GMSCameraPosition *newCameraPosition = [GMSCameraPosition cameraWithTarget:cordinate zoom:10];
[self.mapView animateToCameraPosition:newCameraPosition];

谷歌地图上没有显示注释或标记

1 个答案: