MapKit基础讲解
Map Kit（地图套件）提供了一个接口，可以将地图直接嵌入到自己的视图中。通过Map Kit框架，可以在iOS应用程序中显示地图以及当前位置。通过属性的设定，可以轻松实现位置显示、添加地图注释，通过给定信息查找确定地标信息等相关功能。
- MKMapView：提供了一个可嵌入应用的地图界面。
- MKCoordinateRegin：设置地图显示区域。
- MKPointAnnotation：提供了在指定点添加注释的功能，不能自定义该类。
- MKPinAnnotation：通过此类可以对地图标注进行配置。
- MKAnnotationView：通过此类实现自定义地图标注功能。
创建地图应用
添加MKMapView到视图
MKMapView * mapView = [[MKMapView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:mapView];
MKMapView相关属性
[mapView setDelegate:self];
[mapView setMapType:MKMapTypeStandard]; //有卫星，标准地图等
[mapView setZoomEnabled:YES]; //设置地图缩放
[mapView setScrollEnabled:YES]; //设置地图移动
[mapView setRotateEnabled:YES]; //设置地图旋转
地图的显示区域
//Method.1 -- 通过跨度来设置地图的显示区域
//MKCoordinateRegion region = MKCoordinateRegionMake(CLLocationCoordinate2DMake(-37.855339, 145.153377), MKCoordinateSpanMake(0.1, 0.1));
//Method.2 -- 通过距离来设置地图显示区域
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(CLLocationCoordinate2DMake(-37.855339, 145.153377),100 ,100);
[mapView setRegion:[mapView regionThatFits:region]];
添加地图标注
设置地点坐标
//Method.1
CLLocationCoordinate2D coordinate2D = CLLocationCoordinate2DMake(39.936846 , 116.503729);
//Method.2
CLLocationCoordinate2D coordinate2D;
coordinate2D.latitude = 39.936846;
coordinate2D.longitude = 116.503729;
指定坐标点添加标注
MKPointAnnotation * pointAnntation1 = [[MKPointAnnotation alloc] init];
[pointAnntation1 setTitle:@"当前位置"];
[pointAnntation1 setSubtitle:@"位置说明"];
[pointAnntation1 setCoordinate:coordinate2D];
[mapView addAnnotation:pointAnntation1];
添加多个标注
//标注一
MKPointAnnotation * pointAnntation1 = [[MKPointAnnotation alloc] init];
[pointAnntation1 setTitle:@"当前位置"];
[pointAnntation1 setSubtitle:@"位置说明"];
[pointAnntation1 setCoordinate:coordinate2D];
//标注二
MKPointAnnotation * pointAnntation2 = [[MKPointAnnotation alloc] init];
[pointAnntation2 setTitle:@"当前位置"];
[pointAnntation2 setSubtitle:@"位置说明"];
[pointAnntation2 setCoordinate:coordinate2d];
NSArray * arrAnnitations = @[pointAnntation1,pointAnntation2];
[mapView addAnnotations:arrAnnitations];
地图启动时显示标注气泡
[mapView selectAnnotation:pointAnntation1 animated:YES];
设置标注样式
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{
static NSString * pinIdentifier = @"pin";
MKPinAnnotationView * pintAnntation = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:pinIdentifier];
if(!pintAnntation){
pintAnntation = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:pinIdentifier];
[pintAnntation setPinColor:MKPinAnnotationColorPurple];
[pintAnntation setAnimatesDrop:YES];
[pintAnntation setCanShowCallout:YES];
}
return pintAnntation;
自定义标注视图
- 创建annotation object,并实现MKAnnotation协议
- 创建自定义标注视图，继承自MKAnnotationView
ViewController
- (void)viewDidLoad {
...............
CLLocationCoordinate2D coordinate2D = CLLocationCoordinate2DMake(39.936846, 116.503729);
CustomAnnotation * customAnnotation = [[CustomAnnotation alloc] initWithCoordinate2D:coordinate2D];
[customAnnotation setTitle:@"我的位置"];
[customAnnotation setSubTitle:@"具体说明"];
[mapView addAnnotation:customAnnotation];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{
static NSString * customIdentifier = @"customView";
CustomAnnotationView * customAnnotationView = (CustomAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:customIdentifier];
if(!customAnnotationView){
customAnnotationView = [[CustomAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:customIdentifier];
[customAnnotationView setImage:[UIImage imageNamed:@"an"]];
}
return customAnnotationView;
}
CustomAnnotation
@interface CustomAnnotation : NSObject<MKAnnotation>{
CLLocationCoordinate2D coord;
}
@property (nonatomic, readonly) CLLocationCoordinate2D coord;
@property (nonatomic, copy) NSString * title;
@property (nonatomic, copy) NSString * subTitle;
- (instancetype)initWithCoordinate2D:(CLLocationCoordinate2D)coordinate2D;
@end
@implementation CustomAnnotation
@synthesize coord;
@synthesize title,subTitle;
- (instancetype)initWithCoordinate2D:(CLLocationCoordinate2D)coordinate2D{
self = [super init];
if(self){
coord = coordinate2D;
}
return self;
}
- (CLLocationCoordinate2D)coordinate{
return coord;
}
- (NSString *)title{
return title;
}
- (NSString *)subtitle{
return subTitle;
}
@end
CustomAnnotationView
@interface CustomAnnotationView : MKAnnotationView
@end
@interface CustomAnnotationView()
@property (nonatomic, strong) CustomAnnotation * customAnnotation;
@property (nonatomic, strong) UIView *infoView;
@end
@implementation CustomAnnotationView
- (instancetype)initWithAnnotation:(id<MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier{
self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];
if(self){
self.customAnnotation = annotation;
}
return self;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated{
[super setSelected:selected animated:animated];
if(selected){
self.infoView = [[UIView alloc] initWithFrame:CGRectMake(-(150-50)/2, -30, 150, 30)];
[_infoView.layer setBorderColor:[UIColor blackColor].CGColor];
[_infoView.layer setBorderWidth:1.f];
[_infoView.layer setCornerRadius:5.f];
[self.infoView setBackgroundColor:[UIColor whiteColor]];
[self addSubview:self.infoView];
UILabel * label = [[UILabel alloc] initWithFrame:_infoView.bounds];
[label setFont:[UIFont systemFontOfSize:12]];
[label setTextAlignment:NSTextAlignmentCenter];
[label setText:[NSString stringWithFormat:@"%f %f",_customAnnotation.coordinate.latitude,_customAnnotation.coordinate.longitude]];
[_infoView addSubview:label];
CGFloat scale = 0.001f;
[_infoView setTransform:CGAffineTransformMake(scale, 0, 0, scale, 0, 0)];
[UIView animateWithDuration:0.15 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
CGFloat scale = 1.1f;
[_infoView setTransform:CGAffineTransformMake(scale, 0, 0, scale, 0, 2)];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.1 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
CGFloat scale = 0.9;
[_infoView setTransform:CGAffineTransformMake(scale, 0, 0, scale, 0, -2)];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.075 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
CGFloat scale = 1.0f;
[_infoView setTransform:CGAffineTransformMake(scale, 0, 0, scale, 0, 0)];
} completion:^(BOOL finished) {}];
}];
}];
}else{
[UIView animateWithDuration:0.2 animations:^{
[_infoView setAlpha:0.1];
} completion:^(BOOL finished) {
[_infoView removeFromSuperview];
}];
}
}
选中标注时执行
MKAnnotationView
- (void)setSelected:(BOOL)selected animated:(BOOL)animated{
}
MKMapView代理方法讲解
- (void)mapViewWillStartLoadingMap:(MKMapView *)mapView{
//地图将要载入执行
}
- (void)mapViewDidFinishLoadingMap:(MKMapView *)mapView{
//地图载入完成以后执行
}
- (void)mapViewDidFailLoadingMap:(MKMapView *)mapView withError:(NSError *)error{
//地图载入失败执行
NSLog(@"error:%@",[error description]);
}
- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated{
//地图显示区域将要发生改变时执行
UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"地图位置将要改变" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
[alertView show];
}
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
//地图显示区域改变以后执行
UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"地图位置已经改变" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
[alertView show];
}
//添加标注时调用
- (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views{
}
//标注被选中时执行此方法
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{
}
//标注失去焦点时执行
- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view{
}
//添加左右配件控件时才会调用
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
}