我在一个ViewController中有两个单独的mapview。每个地图视图都会显示一组不同的注释 - 一个地图显示陌生人位置，另一个地图显示朋友位置。当我在第一个mapview（mapView）上点击注释时，我会得到一个包含正确用户数据的详细信息视图。但是，当我在第二个地图视图（friendsMapView）上点击注释时，数据将从填充第一个mapView的字典中提取。记录错误后，我发现对于friendsMapView的didSelectAnnotation永远不会被执行？我怎样才能解决这个问题？
代码未执行（编辑）：
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
if (self.mapView == self.mapView) {
// Do something specific to self.mapView
PointAnnotation *selectedPoint = (PointAnnotation *) view.annotation;
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
OtherUserViewController *yourViewController = (OtherUserViewController *)[storyboard instantiateViewControllerWithIdentifier:@"OtherUserViewController"];
NSMutableDictionary *dictionary = self.addressData[selectedPoint.index];
yourViewController.mapuserData = dictionary;
[self.navigationController pushViewController:yourViewController animated:YES];
} else if (self.mapView == self.friendsMapView) {
// Do something specific to self.friendsMapView
PointAnnotation *selectedPoint = (PointAnnotation *) view.annotation;
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
OtherUserViewController *yourViewController = (OtherUserViewController *)[storyboard instantiateViewControllerWithIdentifier:@"OtherUserViewController"];
NSMutableDictionary *dictionary = self.friendData[selectedPoint.index];
yourViewController.mapuserData = dictionary;
[self.navigationController pushViewController:yourViewController animated:YES];
}
}
完整代码： MapViewController.m
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
if (self.mapView == self.mapView) {
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 1300, 1300);
[self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];
} else if (self.mapView == self.friendsMapView) {
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 1300, 1300);
[self.friendsMapView setRegion:[self.friendsMapView regionThatFits:region] animated:YES];
}
}
- (NSString *)deviceLocation {
return [NSString stringWithFormat:@"latitude: %f longitude: %f", self.locationManager.location.coordinate.latitude, self.locationManager.location.coordinate.longitude];
}
- (NSString *)deviceLat {
return [NSString stringWithFormat:@"%f", self.locationManager.location.coordinate.latitude];
}
- (NSString *)deviceLon {
return [NSString stringWithFormat:@"%f", self.locationManager.location.coordinate.longitude];
}
- (NSString *)deviceAlt {
return [NSString stringWithFormat:@"%f", self.locationManager.location.altitude];
}
NSMutableDictionary *viewParams = [NSMutableDictionary new];
[viewParams setValue:@"u000" forKey:@"view_name"];
[DIOSView viewGet:viewParams success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.addressData = [responseObject mutableCopy];
NSLog(@"%@", responseObject);
int index = 0; //Index to track the data source index while select the annotation call out view.
for (NSMutableDictionary *multiplelocations in self.addressData) {
NSString *location = multiplelocations[@"street_address"];
NSLog(@"Pull addresses %@", location);
NSString *userNames = multiplelocations[@"users_name"];
NSString *userBio = multiplelocations[@"userbio"];
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.mapView.region;
region.span.longitudeDelta /= 8.0;
region.span.latitudeDelta /= 8.0;
PointAnnotation *point = [[PointAnnotation alloc] init];
point.coordinate = placemark.coordinate;
point.title = userNames;
point.subtitle = userBio;
point.index = index; // Store index here.
[self.mapView addAnnotation:point];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure: %@", [error localizedDescription]);
}];
NSMutableDictionary *viewParamsFriend = [NSMutableDictionary new];
[viewParamsFriend setValue:@"accepted_friends" forKey:@"view_name"];
[DIOSView viewGet:viewParamsFriend success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.friendData = [responseObject mutableCopy];
NSLog(@"THIS IS FRIEND DATA %@", self.friendData);
int index = 0;
for (NSMutableDictionary *multiplelocationsFriend in self.friendData) {
NSString *location = multiplelocationsFriend[@"address2"];
NSString *userNames = multiplelocationsFriend[@"node_title"];
NSString *userBio = multiplelocationsFriend[@"body"];
NSLog(@"LOCATION IS HERE %@", location);
CLGeocoder *geocoderFriend = [[CLGeocoder alloc] init];
[geocoderFriend geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.friendsMapView.region;
region.span.longitudeDelta /= 8.0;
region.span.latitudeDelta /= 8.0;
PointAnnotation *point = [[PointAnnotation alloc] init];
point.coordinate = placemark.coordinate;
point.title = userNames;
point.subtitle = userBio;
point.index = index; // Store index here.
[self.friendsMapView addAnnotation:point];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure: %@", [error localizedDescription]);
}];
}
-(MKAnnotationView*)mapView:(MKMapView*)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
MKAnnotationView *view = nil;
if (annotation != self.mapView.userLocation) {
view = [self.mapView dequeueReusableAnnotationViewWithIdentifier:@"myAnnotationIdentifier"];
if (!view) {
static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
MKAnnotationView *annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:AnnotationIdentifier];
annotationView.canShowCallout = YES;
annotationView.image = [UIImage imageNamed:@"mappaw.png"];
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
annotationView.rightCalloutAccessoryView = rightButton;
annotationView.canShowCallout = YES;
annotationView.draggable = YES;
return annotationView;
}
}
return view;
}
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
PointAnnotation *selectedPoint = (PointAnnotation *) view.annotation;
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
OtherUserViewController *yourViewController = (OtherUserViewController *)[storyboard instantiateViewControllerWithIdentifier:@"OtherUserViewController"];
NSMutableDictionary *dictionary = self.addressData[selectedPoint.index];
yourViewController.mapuserData = dictionary;
[self.navigationController pushViewController:yourViewController animated:YES];
}
-(MKAnnotationView*)friendsMapView:(MKMapView*)friendsMapView viewForAnnotation:(id<MKAnnotation>)annotation {
// If you are showing the users location on the map you don't want to change it
MKAnnotationView *view2 = nil;
if (annotation != self.friendsMapView.userLocation) {
view2 = [self.friendsMapView dequeueReusableAnnotationViewWithIdentifier:@"myFriendAnnotationIdentifier"];
if (!view2) {
static NSString *AnnotationIdentifier = @"FriendAnnotationIdentifier";
MKAnnotationView *annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:AnnotationIdentifier];
annotationView.canShowCallout = YES;
annotationView.image = [UIImage imageNamed:@"mappaw.png"];
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
annotationView.rightCalloutAccessoryView = rightButton;
annotationView.canShowCallout = YES;
annotationView.draggable = YES;
return annotationView;
}
}
return view2;
}
- (void)friendsMapView:(MKMapView *)friendsMapView didSelectAnnotationView:(MKAnnotationView *)view2
{
PointAnnotation *selectedPoint = (PointAnnotation *) view2.annotation;
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
OtherUserViewController *yourViewController = (OtherUserViewController *)[storyboard instantiateViewControllerWithIdentifier:@"OtherUserViewController"];
NSMutableDictionary *dictionary = self.friendData[selectedPoint.index];
yourViewController.mapuserData = dictionary;
[self.navigationController pushViewController:yourViewController animated:YES];
NSLog(@"Selected!");
}
答案 0 :(得分：1)
您无法为委托方法制作方法签名。
以下是正确的：
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
以下是一些永远不会被视为委托方法的组合方法：
- (void)friendsMapView:(MKMapView *)friendsMapView didUpdateUserLocation:(MKUserLocation *)userLocation
只需实现正确的委托方法即可。两个地图视图都将使用相同的委托方法。您可以使用mapView参数进行相应操作。
例如，您的两个didUpdateUserLocation委托方法如下所示：
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 1300, 1300);
[mapView setRegion:[mapView regionThatFits:region] animated:YES];
}
一个委托方法适用于两个地图视图。
如果您确实需要根据地图视图执行不同的操作，请执行以下操作：
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
if mapView == self.mapView {
// Do something specific to self.mapView
} else if mapView == self.friendsMapView {
// Do something specific to self.friendsMapView
}
}