iOS Learning _ map _ Add a Pin

The first step is to introduce #import <MapKit/MapKit.h> Framework

Creates a class that inherits and NSObject; declares a property

Next, implement the related operations in Viewcontroller

Introducing Header Files

#import <MapKit/MapKit.h><CoreLocation/CoreLocation.h>"  MyAnnotation.h"

Define the appropriate properties

// Location Manager @property (nonatomic,strong) Cllocationmanager *Locationmanager; // Displays the view of the map @property (nonatomic,strong) Mkmapview *mapview;

Code manipulation

#pragmaMark-Create View-(void) createmapview{//Create a map and add it to the current viewSelf.mapview =[[Mkmapview alloc] Initwithframe:[uiscreen mainscreen].bounds];    [Self.view AddSubview:self.mapView]; //Set up proxy_mapview.Delegate=Self ; //positioningSelf.locationmanager =[[Cllocationmanager alloc] init]; //Make privacy Judgments    if(![Cllocationmanager locationservicesenabled]) {NSLog (@"Current device location is not available"); }    //Determine authorization status    if([Cllocationmanager authorizationstatus]! =kclauthorizationstatusauthorizedwheninuse) {        //you need to set what is allowed to be located in Inforplist before authorizing the request: Nslocationwheninuseusagedescription (Nslocationalwaysusagedescription this is another way )[Self.locationmanager requestwheninuseauthorization]; }    //set location tracking for a map_mapview.usertrackingmode =Mkusertrackingmodefollow; //set the display type of the map_mapview.maptype =Mkmaptypestandard; //Add a PIN[self addannotation];}

Add a PIN

#pragmaMark-Add a pin-(void) addannotation{//Set LocationCllocationcoordinate2d location1 = Cllocationcoordinate2dmake ( +, the); Myannotation*annotation =[[Myannotation alloc] init]; Annotation.coordinate=Location1; Annotation.title=@"Beijing"; Annotation.subtitle=@"ANN";#warningAdd a pictureAnnotation.image= [UIImage imagenamed:@"1"];        [_mapview addannotation:annotation]; Cllocationcoordinate2d Location2= Cllocationcoordinate2dmake ( the,121); Myannotation*annotation1 =[[Myannotation alloc] init]; Annotation1.coordinate=Location2; Annotation1.title=@"Dalian"; Annotation1.subtitle=@"Abxa"; Annotation1.image= [UIImage imagenamed:@"1"];            [_mapview Addannotation:annotation1]; Cllocationcoordinate2d Location3= Cllocationcoordinate2dmake ( to,121); Myannotation*annotation2 =[[Myannotation alloc] init]; Annotation2.coordinate=Location3; Annotation2.title=@"Shanghai"; Annotation2.subtitle=@"Gda"; Annotation2.image= [UIImage imagenamed:@"1"]; [_mapview Addannotation:annotation2];}

Implementing Proxy methods

#pragmaMark-Proxy method for implementing a custom pin view//It is called when a pin is displayed .-(Mkannotationview *) Mapview: (Mkmapview *) Mapview viewforannotation: (id<mkannotation>) annotation{//determine if the Pin class is currently customized    if([Annotation iskindofclass:[myannotationclass]]) {        //define a reuse identity        StaticNSString *identifier =@"Annotationone"; Mkannotationview*annotationview =[_mapview Dequeuereusableannotationviewwithidentifier:identifier]; if(!Annotationview) {Annotationview=[[Mkannotationview alloc] initwithannotation:annotation reuseidentifier:identifier]; //Allow user interactionAnnotationview.canshowcallout =YES; //set the header offset for details and pinsAnnotationview.calloutoffset = Cgpointmake (0,2); //set the left view of the detailsAnnotationview.leftcalloutaccessoryview = [[Uiimageview alloc] initwithimage:[uiimage imagenamed:@"1"]]; }        //Modify the Pin viewAnnotationview.annotation =annotation; Annotationview.image= ((Myannotation *). Annotation). Image; returnAnnotationview; } Else {        returnNil; }}

iOS Learning _ map _ Add a Pin