【发布时间】：2020-09-17 01:20:55
【问题描述】：
我正在尝试使用以下代码（餐厅、公园、聚会和商店）在我的 mapView 上显示多个位置数组。当我打开应用程序时，并非数组中的所有地址都显示在我的 mapView 上（即使返回了所有数据） - 例如有时只有“商店”和“公园”注释数组会显示在我的地图上，但餐厅不可见（即使所有数组的数据都已成功返回）。如果我关闭并重新打开应用程序，有时公园会显示在地图上，但不会显示其他内容。知道为什么会发生这种情况，我该如何解决？代码更新如下。一直在这里！
注意：ParksAnnotation、RestAnnotation、meetupAnn 和 StoreAnnotation 都是 MKPointAnnotation 类。
更新（2020 年 10 月 13 日）：我尝试在检索和地理编码我的“商店”坐标的代码块下记录“地标”。看起来好像 self.storeData 已填充，创建的 NSDictionary storeFields 也是如此。也就是说，当我记录“地标”时，即使填充了 storeFields[@"address"]，它也不会返回任何坐标。其他代码块似乎做得很好（即检索 Meet Ups 和检索 Parks）。因此，Meet Ups、Restaurants 和 Parks 注释看起来很好，但并未填充所有 Stores 注释。当我启动应用程序时，至少有一种类型的注释（有时是缺少的商店，有时是公园）会随机发生这种情况。我一生都无法弄清楚为什么会发生这种情况。
见以下代码：
MapViewController.m
#import "StoreAnnotation.h"
#import "ParksAnnotation.h"
#import "RestAnnotation.h"
#import "meetupAnn.h"
@interface MapViewController ()
@end
@implementation MapViewController
-(void)viewWillAppear:(BOOL)animated {
NSMutableDictionary *viewParamsallUsers1 = [NSMutableDictionary new];
[viewParamsallUsers1 setValue:@"hosted_meet_ups" forKey:@"view_name"];
[DIOSView viewGet:viewParamsallUsers1 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.meetUps = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *allMeetups in self.meetUps) {
NSString *location = allMeetups[@"where"];
NSString *userNames = allMeetups[@"node_title"];
NSString *userBio = allMeetups[@"body"];
self.alertMessage = [allMeetups[@"node_title"] mutableCopy];
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.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
meetupAnn *meet = [[meetupAnn alloc] init];
meet.coordinate = placemark.coordinate;
meet.title = userNames;
meet.subtitle = userBio;
meet.index = index; // Store index here.
[self.mapView addAnnotation:meet];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure: %@", [error localizedDescription]);
}];
/// GRAB ALL RESTAURANT LOCATIONS ///
NSMutableDictionary *viewParams6 = [NSMutableDictionary new];
[viewParams6 setValue:@"restaurants" forKey:@"view_name"];
[DIOSView viewGet:viewParams6 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.neighbourhoodData = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *multiplelocationsFriend in self.neighbourhoodData) {
NSString *location = multiplelocationsFriend[@"address"];
NSString *userNames = multiplelocationsFriend[@"node_title"];
NSString *ampRemoved = [userNames stringByReplacingOccurrencesOfString:@"amp;" withString:@""];
NSString *userBio = multiplelocationsFriend[@"body"];
self.x3 = multiplelocationsFriend[@"x3"];
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.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
RestAnnotation *point1 = [[RestAnnotation alloc] init];
point1.coordinate = placemark.coordinate;
point1.title = ampRemoved;
point1.subtitle = userBio;
point1.index = index; // Store index here.
[self.mapView addAnnotation:point1];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure: %@", [error localizedDescription]);
}];
NSString *test = self.areaName;
NSLog(@"SHOW TEST %@", test);
/// GRAB ALL STORE LOCATIONS ///
NSMutableDictionary *viewParams7 = [NSMutableDictionary new];
[viewParams7 setValue:@"stores" forKey:@"view_name"];
[DIOSView viewGet:viewParams7 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.storesData = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *storeFields in self.storesData) {
NSString *location = storeFields[@"address"];
NSString *userNames = storeFields[@"node_title"];
NSString *ampRemoved = [userNames stringByReplacingOccurrencesOfString:@"amp;" withString:@""];
NSString *userBio = storeFields[@"body"];
self.x3 = storeFields[@"x3"];
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.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
StoreAnnotation *point2 = [[StoreAnnotation alloc] init];
point2.coordinate = placemark.coordinate;
point2.title = ampRemoved;
point2.subtitle = userBio;
point2.index = index; // Store index here.
[self.mapView addAnnotation:point2];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure: %@", [error localizedDescription]);
}];
/// GRAB ALL PARKS LOCATIONS ///
NSMutableDictionary *viewParams8 = [NSMutableDictionary new];
[viewParams8 setValue:@"parks" forKey:@"view_name"];
[DIOSView viewGet:viewParams8 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.parksData = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *parkFields in self.parksData) {
// NSLog(@"WHAT IS IN FRIENDS %@", self.friendData);
NSString *location = parkFields[@"address"];
NSString *userNames = parkFields[@"node_title"];
NSString *ampRemoved = [userNames stringByReplacingOccurrencesOfString:@"amp;" withString:@""];
NSString *userBio = parkFields[@"body"];
self.x3 = parkFields[@"x3"];
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.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
ParksAnnotation *point3 = [[ParksAnnotation alloc] init];
point3.coordinate = placemark.coordinate;
point3.title = ampRemoved;
point3.subtitle = userBio;
point3.index = index; // Store index here.
[self.mapView addAnnotation:point3];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failure: %@", [error localizedDescription]);
}];
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{
MKCoordinateRegion mapRegion;
mapRegion.center = mapView.userLocation.coordinate;
mapRegion.span.latitudeDelta = 0.5;
mapRegion.span.longitudeDelta = 0.5;
[mapView setRegion:mapRegion animated: YES];
[self.locationManager stopUpdatingLocation];
self.locationManager = nil;
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 8000, 8000);
[mapView setRegion:[mapView regionThatFits:region] animated:YES];
[mapView addAnnotations:[mapView annotations]];
});
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
if([annotation isKindOfClass:[StoreAnnotation class]]) {
static NSString *identifier = @"stores";
MKAnnotationView *storesView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(storesView == nil) {
storesView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
storesView.displayPriority = MKFeatureDisplayPriorityRequired;
storesView.canShowCallout = YES;
storesView.image = [UIImage imageNamed:@"storeann4.png"];
}
else {
storesView.annotation = annotation;
}
return storesView;
}
if([annotation isKindOfClass:[meetupAnn class]]) {
static NSString *identifier = @"meetUps";
MKAnnotationView *pulsingView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(pulsingView == nil) {
pulsingView.displayPriority = MKFeatureDisplayPriorityRequired;
pulsingView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
pulsingView.image = [UIImage imageNamed:@"meetupbeacon.png"];
pulsingView.canShowCallout = YES;
}
else {
pulsingView.annotation = annotation;
}
return pulsingView;
}
if([annotation isKindOfClass:[ParksAnnotation class]]) {
static NSString *identifier = @"parks";
MKAnnotationView *parksView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(parksView == nil) {
parksView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
parksView.displayPriority = MKFeatureDisplayPriorityRequired;
parksView.image = [UIImage imageNamed:@"parksann.png"];
parksView.canShowCallout = YES;
}
else {
parksView.annotation = annotation;
}
return parksView;
}
if([annotation isKindOfClass:[RestAnnotation class]]) {
static NSString *identifier = @"rests";
MKAnnotationView *restView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(restView == nil) {
restView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
restView.displayPriority = MKFeatureDisplayPriorityRequired;
restView.image = [UIImage imageNamed:@"restann.png"];
restView.canShowCallout = YES;
}
else {
restView.annotation = annotation;
}
return restView;
}
【问题讨论】：
-
也许
viewDidLoad太早了？ -
@matt 还有什么选择？ viewDidAppear?
-
不知道，试试看。
-
试过了 - 没有改变/没有改变。不过谢谢。 @马特
-
我能想到的唯一其他事情是其中一些可能在屏幕外或重叠
标签： ios objective-c mkmapview mkannotation