所以，我有一份纬度和经度清单，我希望在地图上加注。
下面的第一个方法是从另一个类的方法调用，该方法从单击按钮开始。现在我想在每次调用此方法时添加注释。但是，它不会向地图添加任何内容。也没有错误。
browse.h
@interface browsePage : UIViewController <CLLocationManagerDelegate, MKMapViewDelegate, UIActionSheetDelegate>
@property (strong, nonatomic) IBOutlet MKMapView *mapView;
-(void) SwampsData;
- (IBAction)goToAnotherClass:(id)sender;
- (IBAction)testAnnotaions:(id)sender;
@end
browse.m
- (IBAction)goToAnotherClass:(id)sender {
AlachuaCountySwamps * obje = [[AlachuaCountySwamps alloc]init];
[obje startGetting];
}
- (IBAction)testAnnotaions:(id)sender {
NSLog(@"\n test annotation button");
NSMutableArray *LocationName = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"AlachuaCountySwamps_Names"]];
NSMutableArray *Lat = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"AlachuaCountySwamps_Latitude"]];
NSMutableArray *Lon = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"AlachuaCountySwamps_Longitude"]];
for (int i=0; i<[LocationName count]; i++) {
NSLog(@"%@ : Lat Long: %@ , %@",[LocationName objectAtIndex:i],[Lat objectAtIndex:i],[Lon objectAtIndex:i]);
currentLatitude = [[Lat objectAtIndex:i] doubleValue];
currentLongitude = [[Lon objectAtIndex:i] doubleValue];
currentSwamp = [LocationName objectAtIndex:i];
/// custom location coordinate
CLLocationCoordinate2D userLocationNew2 = CLLocationCoordinate2DMake(currentLatitude, currentLongitude);
// use that cusom coordinate
MKCoordinateRegion region2 = MKCoordinateRegionMakeWithDistance(userLocationNew2, 20000, 20000);
[self.mapView setRegion:[self.mapView regionThatFits:region2] animated:YES];
// Add an annotation
MKPointAnnotation *point2 = [[MKPointAnnotation alloc] init];
point2.coordinate = userLocationNew2;
point2.title = currentSwamp;
point2.subtitle = @"Swamp";
[self.mapView addAnnotation:point2];
}
}
-(void) SwampsData {
// to be used data....
NSLog(@"\n\nDoing alachua----SwampsData method now");
NSMutableArray *LocationName = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"AlachuaCountySwamps_Names"]];
NSMutableArray *Lat = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"AlachuaCountySwamps_Latitude"]];
NSMutableArray *Lon = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"AlachuaCountySwamps_Longitude"]];
NSString *TotalSwamps = [[NSUserDefaults standardUserDefaults] objectForKey:@"NumberOfSwamps"];
NSLog(@"%@ : Lat Long: %@ , %@",[LocationName lastObject],[Lat lastObject],[Lon lastObject]);
currentLatitude = [[Lat lastObject] doubleValue ];
currentLongitude = [[Lon lastObject] doubleValue ];
currentSwamp = [LocationName lastObject];
double valuesRetrievedYet = [LocationName count];
if (valuesRetrievedYet == [TotalSwamps doubleValue]) {
NSLog(@" \n\n Adding the points on map...inside if loop");
// [self performSelectorInBackground:@selector(testAnnotaions:) withObject:nil];
[self testAnnotaions:nil];
}
}
AlachuaCountySwamps.h
@interface AlachuaCountySwamps : UIViewController
-(void) startGetting ;
@end
AlachuaCountySwamps.m
-(void) startGetting {
NSLog(@"Start startGetting the swamps..... ");
NSLog(@"Clearing the array");
// [Names removeAllObjects];
Names= [[NSMutableArray alloc] init];
Latitude= [[NSMutableArray alloc] init];
Longitude= [[NSMutableArray alloc] init];
PFQuery *query = [PFQuery queryWithClassName:@"AlachuaCountySwamps"];
[query whereKey:@"County" equalTo:@"Alachua"];
NSInteger countTotal= [query countObjects];
NSString *totalVals = [NSString stringWithFormat: @"%d", (int)countTotal];
[[NSUserDefaults standardUserDefaults] setObject:totalVals forKey:@"NumberOfSwamps"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
for (PFObject *obj in objects) {
NSString *LastName = [obj objectForKey:@"Name"] ;
NSString *Lat = [obj objectForKey:@"Latitude"] ;
NSString *Lon = [obj objectForKey:@"Longitude"] ;
// add values to array
[Names addObject:LastName];
[Latitude addObject:Lat];
[Longitude addObject:Lon];
[self getResults];
}
} // if end...
else{
NSLog(@"Error: %@ %@", error, [error userInfo]);
}
}];
NSLog(@"Entering");
}
-(void) getResults {
// storing the data in the NSUserDefault
NSUserDefaults * standardUserDefaults = [NSUserDefaults standardUserDefaults];
[[NSUserDefaults standardUserDefaults] setObject:Names forKey:@"AlachuaCountySwamps_Names"];
[[NSUserDefaults standardUserDefaults] setObject:Latitude forKey:@"AlachuaCountySwamps_Latitude"];
[[NSUserDefaults standardUserDefaults] setObject:Longitude forKey:@"AlachuaCountySwamps_Longitude"];
[standardUserDefaults synchronize];
// go to the browsePage class in alachuaSwampData method
browsePage * obje = [[browsePage alloc]init];
[obje SwampsData];
}
输出：
Doing alachua----SwampsData method now
Buck Bay : Lat Long: 29.724151 , -82.327413
Doing alachua----SwampsData method now
Gum Root Swamp : Lat Long: 29.695778 , -82.2332541
Doing alachua----SwampsData method now
Long Pond : Lat Long: 29.5497615 , -82.267022
Doing alachua----SwampsData method now
Mill Pond : Lat Long: 29.5176473 , -82.2721187
Doing alachua----SwampsData method now
Morans Prairie : Lat Long: 29.6859248 , -82.1125949
Doing alachua----SwampsData method now
Mosquito Bay : Lat Long: 29.5529874 , -82.1806915
Doing alachua----SwampsData method now
Mud Swamp : Lat Long: 29.8632273 , -82.3151139
Doing alachua----SwampsData method now
Orange Creek Camp Lake : Lat Long: 29.6387325 , -82.0824958
Doing alachua----SwampsData method now
Potato Patch Bay : Lat Long: 29.7165329 , -82.3395955
Doing alachua----SwampsData method now
River Styx : Lat Long: 29.5181366 , -82.2210298
Doing alachua----SwampsData method now
Saluda Swamp : Lat Long: 29.7390842 , -82.1283104
Doing alachua----SwampsData method now
Sanchez Prairie : Lat Long: 29.7496668 , -82.456391
Doing alachua----SwampsData method now
Stanley Prairie : Lat Long: 29.6184384 , -82.0670156
Adding the points on map...inside if loop
test annotation button
Buck Bay : Lat Long: 29.724151 , -82.327413
Gum Root Swamp : Lat Long: 29.695778 , -82.2332541
Long Pond : Lat Long: 29.5497615 , -82.267022
Mill Pond : Lat Long: 29.5176473 , -82.2721187
Morans Prairie : Lat Long: 29.6859248 , -82.1125949
Mosquito Bay : Lat Long: 29.5529874 , -82.1806915
Mud Swamp : Lat Long: 29.8632273 , -82.3151139
Orange Creek Camp Lake : Lat Long: 29.6387325 , -82.0824958
Potato Patch Bay : Lat Long: 29.7165329 , -82.3395955
River Styx : Lat Long: 29.5181366 , -82.2210298
Saluda Swamp : Lat Long: 29.7390842 , -82.1283104
Sanchez Prairie : Lat Long: 29.7496668 , -82.456391
Stanley Prairie : Lat Long: 29.6184384 , -82.0670156