ios - 当我搜索一个地方时，它会丢弃一个 pin mapView
<p><p>我遇到了 <code>mapView</code> 的问题。很抱歉提出这个问题，但我已经搜索了将近一天来研究这个问题，但我没有找到解决它的方法。</p>
<p> <img src="/image/Z8Gnt.png" alt="When I am searching a place it drops a pin, how can I remove them ?"/> </p>
<pre><code>@interface MapViewController ()<CLLocationManagerDelegate, MKMapViewDelegate, UITextFieldDelegate, CheckInDelegate, NotificationsViewControllerDelegate, ReportVCDelegate, TutorialViewControllerDelegate> {
CLLocationManager *locationManager;
NSTimer *refreshTimer;
int rangeValue;
CheckInViewController *checkInVC;
TutorialViewController *tutorialVC1;
TutorialViewController *tutorialVC2;
UIImageView *imgAvatar;
NSArray *markers;
}
@property (weak, nonatomic) IBOutlet UIView *viewSearch;
@property (weak, nonatomic) IBOutlet RateView *viewRate;
@property (weak, nonatomic) IBOutlet UIView *viewBottom;
@property (weak, nonatomic) IBOutlet UILabel *lblUsername;
@property (weak, nonatomic) IBOutlet UITextField *txtSearch;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *btnNotifications;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *bottomSpace;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *bottomHeight;
@property (weak, nonatomic) IBOutlet UIButton *btnBottom;
@property (weak, nonatomic) IBOutlet HandsawayMapView *mapView;
@property (weak, nonatomic) IBOutlet UIView *mapViewContainer;
@property (strong, nonatomic) MKPlacemark *searchMarker;
@property (strong, nonatomic) MKUserLocation *myMarker;
@property (weak, nonatomic) MapToolbarViewController *mapToolbar;
@property (strong, atomic) NSArray *allMapMarkers;
@property (strong, nonatomic) NSNumber *aggressionIdToCenter;
@end
@implementation MapViewController
- (void)viewDidLoad {
;
// Do any additional setup after loading the view.
// [ setUserHome:@(1)];
rangeValue = 300;
self.viewSearch.layer.masksToBounds = NO;
self.viewSearch.layer.shadowRadius = 0.5f;
self.viewSearch.layer.shadowColor = .CGColor;
self.viewSearch.layer.shadowOffset = CGSizeMake(0.0f, 0.5f);
self.viewSearch.layer.shadowOpacity = 0.5f;
self.viewRate.starCount = 4;
self.viewRate.step = 1.0f;
self.viewRate.starNormalColor = UIColorFromRGB(0xD8D8D8);
self.viewRate.starFillColor = UIColorFromRGB(0xFF5B59);
self.viewRate.rating = 3.0f;
self.viewRate.starSize = 20.0f;
self.viewRate.padding = 8.0f;
locationManager = [ init];
;
locationManager.delegate = self;
;
imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
}];
}
- (void)viewDidAppear:(BOOL)animated {
;
NSNumber *agressionID = [ valueForKey:@"aggression_id"];
if (agressionID && agressionID != 0)
{
self.aggressionIdToCenter = agressionID;
[ setValue:0 forKey:@"aggression_id"];
[ synchronize];
}
if (self.aggressionIdToCenter != nil) {
;
self.aggressionIdToCenter = nil;
}
}
- (void)viewWillDisappear:(BOOL)animated {
;
;
didSetLocation = NO;
}
- (void)didReceiveMemoryWarning {
;
// Dispose of any resources that can be recreated.
}
- (UIView*)locationPin {
User *user = ;
UIImage *pin = ;
if() {
pin = ;
}
UIImageView *pinImageView = [ initWithFrame:CGRectMake(0, 0, 39, 48)];
;
UIView *markerContainer = [ initWithFrame:CGRectMake(0, 0, 39, 48)];
;
imgAvatar = [ initWithFrame:CGRectMake(4.5, 4.5, 30, 30)];
;
imgAvatar.layer.cornerRadius = 15;
imgAvatar.clipsToBounds = YES;
;
if() {
];
}
else {
placeholderImage:];
}
];
];
];
return markerContainer;
}
- (void)ckeckUserImage
{
User *user = ;
if() {
];
}
else {
placeholderImage:];
}
if (self.mapToolbar.currentUser)
{
;
}
}
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using .
// Pass the selected object to the new view controller.
if() {
self.mapToolbar = segue.destinationViewController;
self.mapToolbar.height = self.bottomHeight;
self.mapToolbar.masterVC = self;
} else if ( && ]) {
NotificationsViewController *destination = (NotificationsViewController *)segue.destinationViewController;
destination.delegate = self;
}
else if() {
self.VCactionSheetMap = segue.destinationViewController;
self.VCactionSheetMap.delegate = self.mapToolbar;
} else if () {
self.reportVC = (ReportVC *)segue.destinationViewController;
self.reportVC.delegate = self;
}
}
- (IBAction)onMenu:(id)sender {
;
}
-(IBAction)onLocate:(id)sender {
self.txtSearch.text = @"";
;
self.searchMarker = nil;
didSetLocation = NO;
}
- (IBAction)onCheckIn:(id)sender {
if([ valueForKey:@"tutorials2"]) {
self.btnCheckin.hidden = YES;
checkInVC = ;
checkInVC.delegate = self;
checkInVC.model = [ init];
if(_searchMarker != nil) {
checkInVC.model.longitude = (double) _searchMarker.coordinate.longitude;
checkInVC.model.latitude = (double) _searchMarker.coordinate.latitude;
}
else {
checkInVC.model.longitude = (double) locationManager.location.coordinate.longitude;
checkInVC.model.latitude = (double) locationManager.location.coordinate.latitude;
}
if(]) {
checkInVC.agressionId = sender;
}
UIWindow *currentWindow = .keyWindow;
;
}
else {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if(![ valueForKey:@"tutorials2"]) {
;
;
;
UIStoryboard *tutorials = ;
tutorialVC2 = (TutorialViewController *)];
tutorialVC2.delegate = self;
[ setFrame:self.view.bounds];
belowSubview:self.btnCheckin];
[ setValue:@YES forKey:@"tutorials2"];
}
});
}
}
- (IBAction)onNotifications:(id)sender {
if([ valueForKey:@"tutorials1"]) {
;
}
else {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if(![ valueForKey:@"tutorials1"]) {
;
UIStoryboard *tutorials = ;
tutorialVC1 = (TutorialViewController *)];
tutorialVC1.delegate = self;
[ setFrame:self.view.bounds];
];
[ setValue:@YES forKey:@"tutorials1"];
}
});
});
}
}
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
;
}
BOOL didSetLocation;
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray<CLLocation *> *)locations {
if(locations.count > 0 ) {
CLLocation *aUserLocation = locations;
self.myMarker.coordinate = aUserLocation.coordinate;
// if(_myMarker == nil) {
// GMSMarker *marker = [ init];
// marker.iconView = [ locationPin];
// marker.map = mapView_;
// _myMarker = marker;
// }
// _myMarker.position = aUserLocation.coordinate;
if(!didSetLocation) {
didSetLocation = YES;
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta = 0.01557113906538632;
span.longitudeDelta = 0.02284631241712987;
CLLocationCoordinate2D location;
location.latitude = aUserLocation.coordinate.latitude;
location.longitude = aUserLocation.coordinate.longitude;
region.span = span;
region.center = location;
;
// [APICLIENT locateUserWithCoordinates:location
// completion:^(NSDictionary *result) {
//
// } error:^{
//
// }];
}
}
}
#pragma mark - Bottom bar
BOOL isBottomBarShown = YES;
}
#pragma mark - MKMapViewDelegate
- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated {
// NSLog(@"longitured : %@, lattitude: %@", @(mapView.region.span.longitudeDelta), @(mapView.region.span.latitudeDelta));
;
;
refreshTimer = [NSTimer scheduledTimerWithTimeInterval:0.8
target:self
selector:@selector(refreshMapMarkersWithCoordinates:)
userInfo:@{@"longitude" : @(mapView.region.center.longitude), @"latitude" : @(mapView.region.center.latitude), @"range" : @(rangeValue)}
repeats:NO];
}
- (nullable MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
if(!]) {
MKAnnotationView * annotationView = ;
if(]) {
UIView *userView = ;
;
;
self.myMarker = annotation;
;
}
else {
annotationView.annotation = annotation;
Marker *dbmarker = ((MarkerAnnotation*)annotation).userData;
if(dbmarker.agression != nil) {
];
;
}
else if(dbmarker.user != nil) {
UIView *userView = ;
;
;
;
}
}
return annotationView;
}
return nil;
}
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
if(view.annotation != self.searchMarker && view.annotation != self.myMarker) {
if(]) {
}
else {
;
}
}
else
{
if (view.annotation == self.myMarker)
{
;
}
;
}
}
- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view {
if(view.annotation != self.searchMarker && view.annotation != self.myMarker) {
if(]) {
}
else {
;
}
}
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation {
[APICLIENT locateUserWithCoordinates:userLocation.location.coordinate
completion:^(NSDictionary *result) {
} error:^{
}];
}
#pragma mark - GMSMap delegate
//- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker {
// ;
// return YES;
//}
- (void)selectMarker:(Marker *)marker {
Marker *dbMarker = marker;
if(dbMarker.agression != nil) {
[APICLIENT getAgressionWithId:dbMarker.agression.webID
completion:^(Marker *newmarker) {
completion:^(User *result) {
self.mapToolbar.marker = newmarker;
//;
} error:^{
}];
} error:^{
}];
}
else {
completion:^(User *result) {
self.mapToolbar.marker = dbMarker;
;
} error:^{
}];
}
}
-(void)reloadMarkers {
[APICLIENT getMapMarkersAroundMeWithCoordinates:self.mapView.region.center
range:@(rangeValue)
completion:^(NSArray *result) {
;
NSArray *oldAnnotations = ]];
oldAnnotations = ;
markers = ];
//;
NSMutableArray *allMapMarkersMutable = [ init];
for(Marker *dbmarker in markers) {
MarkerAnnotation *marker = [ init];
marker.coordinate = CLLocationCoordinate2DMake(, );
marker.userData = dbmarker;
;
;
}
self.allMapMarkers = [ arrayByAddingObjectsFromArray:oldAnnotations];
if(_searchMarker != nil && !) {
;
}
if(self.aggressionIdToCenter != nil) {
;
self.aggressionIdToCenter = nil;
}
} error:^{
}];
/*NSArray *oldAnnotations = ]];
oldAnnotations = ;
markers = ];
// ;
NSMutableArray *allMapMarkersMutable = [ init];
for(Marker *dbmarker in markers) {
MarkerAnnotation *marker = [ init];
marker.coordinate = CLLocationCoordinate2DMake(, );
marker.userData = dbmarker;
;
;
}
self.allMapMarkers = [ arrayByAddingObjectsFromArray:oldAnnotations];
if(_searchMarker != nil && !) {
;
}
if(self.aggressionIdToCenter != nil) {
;
self.aggressionIdToCenter = nil;
}*/
}
//-(void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D)coordinate {
// ;
//}
#pragma mark - UITextFieldDelegate and place search
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
;
MKCoordinateRegion newRegion;
newRegion.center.latitude = locationManager.location.coordinate.latitude;
newRegion.center.longitude = locationManager.location.coordinate.longitude;
// Setup the area spanned by the map region:
// We use the delta values to indicate the desired zoom level of the map,
// (smaller delta values corresponding to a higher zoom level).
// The numbers used here correspond to a roughly 8 mi
// diameter area.
//
newRegion.span.latitudeDelta = 0.112872;
newRegion.span.longitudeDelta = 0.109863;
MKLocalSearchRequest *request = [ init];
request.naturalLanguageQuery = textField.text;
request.region = newRegion;
MKLocalSearch *localSearch = [ initWithRequest:request];
MKLocalSearchCompletionHandler completionHandler = ^(MKLocalSearchResponse *response, NSError *error) {
if (error != nil) {
// NSString *errorStr = [ valueForKey:NSLocalizedDescriptionKey];
// UIAlertView *alert = [ initWithTitle:@"Could not find places"
// message:errorStr
// delegate:nil
// cancelButtonTitle:@"OK"
// otherButtonTitles:nil];
// ;
} else {
NSArray<MKMapItem *> *mapItems = ;
if(mapItems.count > 0) {
MKCoordinateRegion boundingRegion = response.boundingRegion;
MKMapItem *item = mapItems;
self.searchMarker = item.placemark;
;
;
}
}
};
;
double radians(double degrees) {
return degrees * M_PI / 180.0;
}
double degrees(double radians) {
return radians * 180.0 / M_PI;
}
const CLLocationDegrees kLatLonEarthRadius = 6371.0;
CLLocationCoordinate2D LatLonDestPoint(CLLocationCoordinate2D origin, double bearing, CLLocationDistance distance) {
double brng = radians(bearing);
double lat1 = radians(origin.latitude);
double lon1 = radians(origin.longitude);
CLLocationDegrees lat2 = asin(sin(lat1) * cos(distance / kLatLonEarthRadius) +
cos(lat1) * sin(distance / kLatLonEarthRadius) * cos(brng));
CLLocationDegrees lon2 = lon1 + atan2(sin(brng) * sinf(distance / kLatLonEarthRadius) * cos(lat1),
cosf(distance / kLatLonEarthRadius) - sin(lat1) * sin(lat2));
lon2 = fmod(lon2 + M_PI, 2.0 * M_PI) - M_PI;
CLLocationCoordinate2D coordinate;
if (! (isnan(lat2) || isnan(lon2))) {
coordinate.latitude = degrees(lat2);
coordinate.longitude = degrees(lon2);
}
return coordinate;
}
#pragma mark - CheckInDelegate
- (void)willRemoveCheckinView {
[ setStatusBarHidden:NO
withAnimation:UIStatusBarAnimationSlide];
[self.navigationController setNavigationBarHidden:NO
animated:YES];
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>问题是您在 <code>MKLocalSearchCompletionHandler</code> 中添加标记，因此从 <code>MKLocalSearchCompletionHandler</code> 中删除以下行将解决您的问题。 </p>
<pre><code>;
</code></pre></p>
<p style="font-size: 20px;">关于ios - 当我搜索一个地方时，它会丢弃一个 pin mapView，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/40802266/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/40802266/
</a>
</p>
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