更新 2:
这是 map 中的现有代码，但好像注释与图钉一起乱序了。一次 pin 是绿色的，下一次我运行它时，同一个 pin 是红色的。脱节从何而来？
-(void) viewWillAppear:(BOOL)animated {
self.annotationArray = [[NSMutableArray alloc] init];
CLLocationCoordinate2D coord = {.latitude = 15.8700320, .longitude = 100.9925410};
MKCoordinateSpan span = {.latitudeDelta = 3, .longitudeDelta = 3};
MKCoordinateRegion region = {coord, span};
[mapViewUI setRegion:region];
PFQuery *query = [PFQuery queryWithClassName:@"Share"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
self.mapViewData = objects;
for (int i=0;i<[objects count];i++)
{
// Question * q = [[Question alloc]init];
PFObject * obj = [self.mapViewData objectAtIndex:i];
NSLog(@"%@", obj);
self.theObject = obj;
NSString *string = obj[@"WhereAt"];
NSArray *stringArray = [string componentsSeparatedByString: @","];
CLLocationDegrees myLatitude = [[stringArray objectAtIndex:0] doubleValue];
CLLocationDegrees myLongitude = [[stringArray objectAtIndex:1] doubleValue];
CLLocationCoordinate2D coord2 = {.latitude = myLatitude, .longitude = myLongitude};
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"MMM dd, yyyy";
MKPointAnnotation *annotation2 = [[MKPointAnnotation alloc] init];
[annotation2 setCoordinate:coord2];
[annotation2 setTitle:obj[@"FamilyName"]];
[annotation2 setSubtitle:obj[@"Result"]];
[mapViewUI addAnnotation:annotation2];
}
} else {
// Log details of the failure
NSLog(@"Error: %@ %@", error, [error userInfo]);
}
}];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
if (annotation == mapViewUI.userLocation)
{
return nil;
}
else
{
NSUInteger index = [[mapView annotations] indexOfObject:annotation];
PFObject *objectForCurrentAnnotation = [self.mapViewData objectAtIndex:index];
MKPinAnnotationView *annotationView = [[MKPinAnnotationView alloc] init];
annotationView.enabled = YES;
annotationView.canShowCallout = YES;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"MMM dd, yyyy";
NSString *theResult = objectForCurrentAnnotation[@"Result"];
NSLog(@"Result is %@", theResult);
if ([theResult isEqualToString:@"Accepted Bible"]) {
NSLog(@"Accepted");
annotationView.pinTintColor = [UIColor greenColor];
}
else if ([theResult isEqualToString:@"Requested Different Material"]) {
NSLog(@"Different");
annotationView.pinTintColor = [UIColor blackColor];
}
else if ([theResult isEqualToString:@"Not Home"]) {
NSLog(@"Not Home");
annotationView.pinTintColor = [UIColor yellowColor];
}
else if ([theResult isEqualToString:@"Rejected Bible"]) {
NSLog(@"Rejected");
annotationView.pinTintColor = [UIColor redColor];
}
return annotationView;
}
return nil;
}
更新:
我现在看到问题是 self.theObject 被设置了一次，所以它只是从中提取数据，用于注释未处理的所有内容。我想现在的问题是，我怎样才能让它显示每个对象而不是最后一组？
我的应用程序使用 Parse.com 和 PFObjects。该应用程序查询 PFObject 以获取行中每个条目的所有数据，提取该条目给定位置的坐标以及各种数据，并为每个条目添加注释。当我为此设置 MKAnnotationView 以便我可以在 Apple 通常允许您轻松执行的操作之外拥有多个彩色图钉时，我遇到了问题。注释的图像和一些数据将每个引脚设置为最后一个调用的引脚。标题和副标题都很好，但颜色或标注图像不是。这是我的代码，这里出了什么问题？
-(void) viewWillAppear:(BOOL)animated {
CLLocationCoordinate2D coord = {.latitude = 15.8700320, .longitude = 100.9925410};
MKCoordinateSpan span = {.latitudeDelta = 3, .longitudeDelta = 3};
MKCoordinateRegion region = {coord, span};
[mapView setRegion:region];
PFQuery *query = [PFQuery queryWithClassName:@"Share"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
NSLog(@"YAY");
// The find succeeded. The first 100 objects are available in objects
// questionsList = [[NSMutableArray alloc]init];
NSLog(@"Objects%lu", (unsigned long)[objects count]);
for (int i=0;i<[objects count];i++)
{
// Question * q = [[Question alloc]init];
PFObject * obj = [objects objectAtIndex:i];
self.theObject = obj;
NSString *string = obj[@"WhereAt"];
NSArray *stringArray = [string componentsSeparatedByString: @","];
CLLocationDegrees myLatitude = [[stringArray objectAtIndex:0] doubleValue];
CLLocationDegrees myLongitude = [[stringArray objectAtIndex:1] doubleValue];
CLLocationCoordinate2D coord2 = {.latitude = myLatitude, .longitude = myLongitude};
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"MMM dd, yyyy";
NSString *theResult = obj[@"Result"];
NSString *theDate = [dateFormatter stringFromDate:obj[@"DateVisited"]];
NSString *combined = [[theResult stringByAppendingString:@" on "] stringByAppendingString:theDate];
NSString *theTitle = [[obj[@"FamilyName"] stringByAppendingString:@" "] stringByAppendingString:obj[@"StreetAddress"]];
MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
[annotation setCoordinate:coord2];
[annotation setTitle:theTitle];
[annotation setSubtitle:combined];
[mapView addAnnotation:annotation];
}
} else {
// Log details of the failure
NSLog(@"Error: %@ %@", error, [error userInfo]);
}
}];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
MKPinAnnotationView *annotationView = [[MKPinAnnotationView alloc] init];
annotationView.enabled = YES;
annotationView.canShowCallout = YES;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"MMM dd, yyyy";
NSString *theResult = self.theObject[@"Result"];
NSLog(@"Result is %@", theResult);
if ([theResult isEqualToString:@"Accepted Bible"]) {
// NSLog(@"Accepted");
annotationView.pinTintColor = [UIColor greenColor];
}
else if ([theResult isEqualToString:@"Requested Different Material"]) {
//NSLog(@"Different");
annotationView.pinTintColor = [UIColor blackColor];
}
else if ([theResult isEqualToString:@"Not Home"]) {
// NSLog(@"Not Home");
annotationView.pinTintColor = [UIColor yellowColor];
}
else if ([theResult isEqualToString:@"Rejected Bible"]) {
//NSLog(@"Rejected");
annotationView.pinTintColor = [UIColor redColor];
}
//annotationView.image = [UIImage imageNamed:@"arrest.png"];//here we use a nice image instead of the default pins
PFFile *thumbnail = self.theObject[@"HousePicture"];
[thumbnail getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
UIImage *thumbnailImage = [UIImage imageWithData:imageData];
self.theImage = thumbnailImage;
//annotationView.image = thumbnailImage;
UIView *leftCAV = [[UIView alloc] initWithFrame:CGRectMake(0,0,60,60)];
UIImageView *theImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 60, 60)];
theImageView.image = self.theImage;
annotationView.leftCalloutAccessoryView = leftCAV;
[leftCAV addSubview:theImageView];
annotationView.canShowCallout = YES;
}];
return annotationView;
return nil;
}
最佳答案
子类 MKPointAnnotation 例如 MyPointAnnotation 添加一个属性 result
@interface MyPointAnnotation : MKPointAnnotation
@property (nonatomic, strong) NSString *result;
@end
在viewWillAppear:中修改这些行
NSString *theResult = obj[@"Result"];
MyPointAnnotation *myAnnotation = [[MyPointAnnotation alloc] init];
[myAnnotation setCoordinate:coord2];
[myAnnotation setTitle:theTitle];
[myAnnotation setSubtitle:combined];
[myAnnotation setResult:theResult];
[mapView addAnnotation:myAnnotation];
在viewForAnnotation:委托(delegate)方法中得到这样的结果
MyPointAnnotation *myAnnotation = (MyPointAnnotation *)annotation;
NSString *theResult = myAnnotation.result;
关于ios - 向 map 添加多个注释但都显示一些相同的数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39235505/