自定义注释苹果mapkit

debugcn 发表于 Dev

针头

我正在尝试分配两个自定义注释，一个称为“ arsenal.png”，另一个称为“ chelsea.png”

使用Apple Mapkit框架，xcode 7。

需要代码帮助以实现自定义标记。

这是我的实现文件：

// TrucksViewController.m

#import "TrucksViewController.h"
#import "Annotation.h"

@interface TrucksViewController ()

@end

//Wimbledon Coordinates
#define WIMB_LATITUDE 51.434783;
#define WIMB_LONGITUDE -0.213428;

//Stadium Coordinates
#define ARSENAL_LATITUDE 51.556899;
#define ARSENAL_LONGITUDE -0.106483;

#define CHELSEA_LATITUDE 51.481314;
#define CHELSEA_LONGITUDE -0.190129;

//Span
#define THE_SPAN 0.20f;

@implementation TrucksViewController
@synthesize myMapView;

#pragma mark -
#pragma mark Initialisation

- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {

    self.title = @"Trucks";

    [[UIApplication sharedApplication] setStatusBarHidden:NO     withAnimation:UIStatusBarAnimationNone];
}
return self;
}

#pragma mark -
#pragma mark UIViewController Delegates

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}

- (void)viewDidUnload {
[super viewDidUnload];
}

-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];

// Update support iOS 7
if ([self respondsToSelector:@selector(edgesForExtendedLayout)]) {
    self.edgesForExtendedLayout = UIRectEdgeNone;
    self.navigationController.navigationBar.translucent = NO;
}
}

-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];

// Revert to default settings
if ([self respondsToSelector:@selector(edgesForExtendedLayout)]) {
    self.edgesForExtendedLayout = UIRectEdgeAll;
}
}

- (void)viewDidLoad 
{
[super viewDidLoad];

//Create Region
MKCoordinateRegion myRegion;

//Center
CLLocationCoordinate2D center;
center.latitude = ARSENAL_LATITUDE;
center.longitude = ARSENAL_LONGITUDE;

//Span
MKCoordinateSpan span;
span.latitudeDelta = THE_SPAN;
span.longitudeDelta = THE_SPAN;

//Region
myRegion.center = center;
myRegion.span = span;

//Set our mapview
[myMapView setRegion:myRegion animated:YES];

//Annotation
NSMutableArray * locations = [[NSMutableArray alloc] init];
CLLocationCoordinate2D location;
Annotation * myAnn;

//Arsenal annotation
myAnn = [[Annotation alloc] init];
location.latitude = ARSENAL_LATITUDE;
location.longitude = ARSENAL_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Arsenal FC";
myAnn.subtitle = @"The Gunners";
[locations addObject:myAnn];

//Chelsea annotation
myAnn = [[Annotation alloc] init];
location.latitude = CHELSEA_LATITUDE;
location.longitude = CHELSEA_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Chelsea FC";
myAnn.subtitle = @"The Blue Lions";
[locations addObject:myAnn];

[self.myMapView addAnnotations:locations];

}

@end

添加发布2013/12/11 18:31东部时间

更新了Annotations.h文件

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>

@interface Annotation : NSObject <MKAnnotation>

@property(nonatomic, assign) CLLocationCoordinate2D coordinate;
@property(nonatomic, copy) NSString * title;
@property(nonatomic, copy) NSString * subtitle;
@property(nonatomic, copy) NSString * imageName;

@end

更新了Annotations.m文件

#import "Annotation.h"

@implementation Annotation
@synthesize coordinate, title, subtitle, imageName;

@end

更新了TrucksViewController.h

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>

@interface TrucksViewController : UIViewController {

}
@property (weak, nonatomic) IBOutlet MKMapView *myMapView;

@end

更新了TrucksViewController.m

（代码段）

//Arsenal annotation
myAnn = [[Annotation alloc] init];
location.latitude = ARSENAL_LATITUDE;
location.longitude = ARSENAL_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Arsenal FC";
myAnn.subtitle = @"The Gunners";
myAnn.imageName = @"arsenal";
[locations addObject:myAnn];

//Chelsea annotation
myAnn = [[Annotation alloc] init];
location.latitude = CHELSEA_LATITUDE;
location.longitude = CHELSEA_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Chelsea FC";
myAnn.subtitle = @"The Blue Lions";
myAnn.imageName = @"chelsea";
[locations addObject:myAnn];

[self.myMapView addAnnotations:locations];

}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

这是我更新的TrucksViewController.m文件：2013/12/11 20:07 Eastern

// TrucksViewController.m

#import "TrucksViewController.h"
#import "Annotation.h"

@interface TrucksViewController ()


@end

//Wimbledon Coordinates
#define WIMB_LATITUDE 51.434783;
#define WIMB_LONGITUDE -0.213428;

//Stadium Coordinates
#define ARSENAL_LATITUDE 51.556899;
#define ARSENAL_LONGITUDE -0.106483;

#define CHELSEA_LATITUDE 51.481314;
#define CHELSEA_LONGITUDE -0.190129;

//Span
#define THE_SPAN 0.20f;

@implementation TrucksViewController
@synthesize myMapView;

//insert code per Anna

-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:    (id<MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[Annotation class]])
{
    static NSString *reuseId = @"ann";
    MKAnnotationView *av = [mapView dequeueReusableAnnotationViewWithIdentifier:reuseId];
    if (av == nil)
    {
        av = [[MKAnnotationView alloc] initWithAnnotation:annotation     reuseIdentifier:reuseId];
    }
    else
    {
        av.annotation = annotation;
    }

    Annotation *ann = (Annotation *)annotation;
    av.image = [UIImage imageNamed:ann.imageName];

    return av;
}

//return nil (default view) if annotation is not our custom type
return nil;
}

//end new code per Anna

#pragma mark -
#pragma mark Initialisation

- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
    // Set the title for this view controller
    // Note: In future we will copy over the title from any created     UINavigationBar objects
    self.title = @"Trucks";

    [[UIApplication sharedApplication] setStatusBarHidden:NO         withAnimation:UIStatusBarAnimationNone];
}
return self;
}

#pragma mark -
#pragma mark UIViewController Delegates

- (void)viewDidUnload {
[super viewDidUnload];
}

-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];

// Update support iOS 7
if ([self respondsToSelector:@selector(edgesForExtendedLayout)]) {
    self.edgesForExtendedLayout = UIRectEdgeNone;
    self.navigationController.navigationBar.translucent = NO;
}
}

-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];

// Revert to default settings
if ([self respondsToSelector:@selector(edgesForExtendedLayout)]) {
    self.edgesForExtendedLayout = UIRectEdgeAll;
}
}

- (void)viewDidLoad
{
[super viewDidLoad];

//Create Region
MKCoordinateRegion myRegion;

//Center
CLLocationCoordinate2D center;
center.latitude = ARSENAL_LATITUDE;
center.longitude = ARSENAL_LONGITUDE;

//Span
MKCoordinateSpan span;
span.latitudeDelta = THE_SPAN;
span.longitudeDelta = THE_SPAN;

//Region
myRegion.center = center;
myRegion.span = span;

//Set our mapview
[myMapView setRegion:myRegion animated:YES];

//Annotation
NSMutableArray * locations = [[NSMutableArray alloc] init];
CLLocationCoordinate2D location;
Annotation * myAnn;

//Arsenal annotation
myAnn = [[Annotation alloc] init];
location.latitude = ARSENAL_LATITUDE;
location.longitude = ARSENAL_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Arsenal FC";
myAnn.subtitle = @"The Gunners";
myAnn.imageName = @"arsenal.png";
[locations addObject:myAnn];

//Chelsea annotation
myAnn = [[Annotation alloc] init];
location.latitude = CHELSEA_LATITUDE;
location.longitude = CHELSEA_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Chelsea FC";
myAnn.subtitle = @"The Blue Lions";
myAnn.imageName = @"chelsea.png";
[locations addObject:myAnn];

[self.myMapView addAnnotations:locations];

}

- (void)didReceiveMemoryWarning
   {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    }

@end

用户名

您确实需要实现viewForAnnotation委托方法来显示注释的图像，而不是标准的红色图钉。

在该委托方法中，您需要创建一个MKAnnotationView并将其image属性设置为的图像返回给注解所需的图像。

您将获得对地图视图所要求的注释的引用，并使用注释的属性，相应地设置图像。

您可以基于注释的title值，但是我建议采用以下方法：

将imageName类型的属性添加NSString到您的Annotation类。将此属性设置为用于注释的图像名称，然后再调用addAnnotation它。例如：
```
myAnn.title = @"Arsenal FC";
myAnn.subtitle = @"The Gunners";
myAnn.imageName = @"arsenal";
[locations addObject:myAnn];
```

在viewForAnnotation委托方法中，检查注释是否为类型Annotation，然后使用其imageName属性设置注释视图的image属性：

-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
    if ([annotation isKindOfClass:[Annotation class]])
    {
        static NSString *reuseId = @"ann";
        MKAnnotationView *av = [mapView dequeueReusableAnnotationViewWithIdentifier:reuseId];
        if (av == nil)
        {
            av = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseId];
        }
        else
        {
            av.annotation = annotation;
        }

        Annotation *ann = (Annotation *)annotation;
        av.image = [UIImage imageNamed:ann.imageName];

        return av;
    }

    //return nil (default view) if annotation is not our custom type
    return nil;
}

另外，不要忘记设置地图视图的delegate属性，否则将不会调用委托方法。在Interface Builder中，将delegate插座连接到视图控制器。

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