我将注释作为硬编码值添加到方法
中- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
CLLocationCoordinate2D coords1;
coords1.latitude = 40.579754;
coords1.longitude = -120.1303229;
MKPointAnnotation *annotationPoint1 = [[MKPointAnnotation alloc] init];
annotationPoint1.coordinate = coords1;
annotationPoint1.title = @"TJ11234";
annotationPoint1.subtitle = @"Power Failure \n Start Time:12hrs 30min \n End Time:14hrs ";
[self.mapView addAnnotation:annotationPoint1];
具有lats和经度硬编码的值,其加载正常,但当我转到另一页并返回页面时,注释未加载。我该怎么做才能纠正它?
答案 0 :(得分:0)
mapView:didUpdateUserLocation:
。查看documentation。
如果您想在显示地图时设置注释,可以将代码放在viewDidAppear
或类似内容中。
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated]
CLLocationCoordinate2D coords1;
coords1.latitude = 40.579754;
coords1.longitude = -120.1303229;
MKPointAnnotation *annotationPoint1 = [[MKPointAnnotation alloc] init];
annotationPoint1.coordinate = coords1;
annotationPoint1.title = @"TJ11234";
annotationPoint1.subtitle = @"Power Failure \n Start Time:12hrs 30min \n End Time:14hrs ";
[self.mapView addAnnotation:annotationPoint1];
}
希望这有帮助。